MFJ | 495 | manual | MFJ 495 - MEMORY KEYER/KEYBOARD Manual

MFJ 495 - MEMORY KEYER/KEYBOARD Manual
Model MFJ-495
INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
VERSION 0E
COPYRIGHT
C
2001-2012 MFJ ENTERPRISES, INC.
DISCLAIMER
Information in this manual is designed for user purposes only and is not intended to
supersede information contained in customer regulations, technical manuals/documents,
positional handbooks, or other official publications. The copy of this manual provided to
the customer will not be updated to reflect current data.
Customers using this manual should report errors or omissions, recommendations for
improvements, or other comments to MFJ Enterprises, 300 Industrial Park Road,
Starkville, MS 39759. Phone: (662) 323-5869; FAX: (662) 323-6551. Business hours:
M-F 8-4:30 CST.
MFJ-495 Memory Keyer
Instruction Manual
Contents
THE BASICS
Introduction...................................................................................................................................... 1
Front Panel....................................................................................................................................... 2
Back Panel ....................................................................................................................................... 3
Connecting to a Computer ............................................................................................................... 5
Basic Operation................................................................................................................................ 6
How to Use the Menu System ......................................................................................................... 6
THE MENUS
Main Menus ..................................................................................................................................... 9
MSG1-MSG4 Buttons ........................................................................................................ 9
MSG5-MSG8 Buttons ........................................................................................................ 9
Command [COM] Button ................................................................................................... 9
Decrement [DEC] Button ................................................................................................... 9
Carrier Tune [CXT] Button ................................................................................................ 9
Pulse Tune [PXT] Button ................................................................................................... 9
Speed................................................................................................................................. 10
Farnsworth ........................................................................................................................ 10
Weight............................................................................................................................... 10
Tone .................................................................................................................................. 10
Changing Memory Banks ................................................................................................. 10
Miscellaneous ................................................................................................................... 10
Setup Menus .................................................................................................................................. 11
Speed Ratio ....................................................................................................................... 11
Overall Speed.................................................................................................................... 11
Farnsworth ........................................................................................................................ 11
CCW Weight..................................................................................................................... 12
CW Weight ....................................................................................................................... 12
Character Space ................................................................................................................ 12
Word Space....................................................................................................................... 12
Keying Compensation....................................................................................................... 13
Keying Delay .................................................................................................................... 13
PTT Hang Time ................................................................................................................ 13
Tone .................................................................................................................................. 13
Serial Number ................................................................................................................... 14
Leading Zeroes ................................................................................................................. 14
Other Zeroes ..................................................................................................................... 14
Nines ................................................................................................................................. 14
Iambic ............................................................................................................................... 14
Reverse.............................................................................................................................. 15
Paddle ............................................................................................................................... 15
Monitor ............................................................................................................................. 15
Output ............................................................................................................................... 15
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
Queue ................................................................................................................................ 15
User................................................................................................................................... 15
THE PADDLE
Using the MFJ-495 with a Paddle.................................................................................................. 16
Setup Commands ........................................................................................................................... 16
Message Memory........................................................................................................................... 20
THE KEYBOARD
Using the MFJ-495 with a Keyboard............................................................................................. 21
Keyboard Key Combinations......................................................................................................... 21
Setup Commands ........................................................................................................................... 23
Message Memory........................................................................................................................... 27
Quick Speeds ................................................................................................................................. 28
THE TERMINAL
Using the MFJ-495 with a Terminal Program ............................................................................... 29
Setup Commands ........................................................................................................................... 29
Message Memory........................................................................................................................... 34
Uploading and Downloading Messages......................................................................................... 34
Loading a Memory Block from the Computer.................................................................. 34
Loading a Memory Block Manually................................................................................. 35
Sending Contents of a Memory Block to the Computer ................................................... 35
THE MEMORY
Message Memory........................................................................................................................... 36
Preparing Messages ....................................................................................................................... 37
Embedded Commands ................................................................................................................... 37
APPENDICES
Resetting the Keyer........................................................................................................................ 41
Factory Defaults................................................................................................................ 41
Message Memory Reset.................................................................................................... 42
Self Test ......................................................................................................................................... 42
Power Down Circuit Test............................................................................................................... 43
Troubleshooting ............................................................................................................................. 44
Technical Assistance...................................................................................................................... 44
Morse Code Character Set ............................................................................................................. 45
Signals Used in Other Radio Services ........................................................................................... 46
Some CW Abbreviations ............................................................................................................... 46
Meaning of Q Signals .................................................................................................................... 47
Setup Commands ........................................................................................................................... 48
Schematic....................................................................................................................................... 50
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 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
FIGURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
MFJ-495 Front Panel....................................................................................................... 2
MFJ-495 Back Panel ....................................................................................................... 3
Qwerty Keyboard Layout ................................................................................................ 5
Dvorak Keyboard Layout ................................................................................................ 5
MFJ-495 Menu Flow and Button Action Chart............................................................... 7
Code Weight.................................................................................................................. 12
Keying Delay and PTT Hang Time Timing .................................................................. 13
Rise Time and Decay Time Timing .............................................................................. 14
MFJ-495 Message Memory Structure ........................................................................... 36
TABLES
Table 1.
Table 2.
Table 3.
Table 4.
Keying Output Jumpers .................................................................................................... 3
Manual Key Jumper.......................................................................................................... 4
Keyboard Jumpers ............................................................................................................ 4
Setup Commands ............................................................................................................ 48
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MFJ-495 Memory Keyer
Instruction Manual
THIS PAGE IS LEFT BLANK INTENTIONALLY
iv
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
The Basics
Introduction
The MFJ-495 Memory Keyer is a full-featured memory keyer combining dual microprocessors and a nonvolatile EEPROM chip for a full featured, low cost, high reliability design. Unlike other keyers, it uses a
LCD display to set keyer functions and show the sending message. The MFJ-495 keys CW from a
paddle, a keyboard and a serial computer interface. All code parameters are changed with an easy to use
menu interface shown on the LCD display. The MFJ-495 has 32 message memories total over 8000
characters which can be loaded by paddle, keyboard or from a computer with a terminal program. The
MFJ-495 can repeat messages continuously, insert timed pauses within messages, insert an autoincrementing serial number, have messages call other messages or insert embedded commands into a
message. Commands also can be simply sent to the keyer in Morse code using your paddles, keyboard,
terminal program on your computer, or push-button switches on the unit.
The MFJ-495 has controls for volume and speed on the front of the unit. The paddle jack connects to any
iambic or single lever (dual contact) key paddle. The keyboard port allows use of an optional keyboard
for keyboard keying operation. The serial interface allows connection of most RS-232 compatible
computers. The MFJ-495 supports both Direct and Grid-Block outputs and has a port for an optional
remote control. Some of its features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
2-line by 16-character LCD display.
Iambic keyer with dot and dash memories; automatic, semi-automatic or hand-key mode.
32 messages (four banks of eight messages each) total over 8000 characters.
Messages may “call” other messages and contain programmed functions.
Message editing capability.
Input queue to store multiple message activation.
Auto-incrementing contest serial number from 001 to 9999.
Digital and linear analog speed control from 5 to 99 WPM (2:1-to-20:1 speed range ratio).
Farnsworth mode with speed from 10 to 99 WPM.
Ultra speed mode allows messages at speeds up to 990 WPM.
QRSS mode allows messages at speeds of QRSS1 to QRSS99.
Adjustable weight on code elements from 25% to 75% (constant or speed dependent).
Adjustable sidetone frequency from 300 to 1000 Hz.
Compensation for transmitter character shortening up to 25 ms.
Keying output delay up to 20 ms to accommodate switching delay.
Push-to-talk (PTT) hang time up to 10 seconds.
Direct (positive) or grid-block (negative) keying.
Carrier tune and adjustable pulse tune functions for transmitter adjustment.
Timed pauses within messages and message loop capability for continuous replay.
Message and keyer configuration saved without battery backup.
Internal sidetone speaker with adjustable volume.
Support for Qwerty and Dvorak keyboards with RepeatKey feature.
190 characters type-ahead keyboard buffer with buffer-full warning.
Quad user mode supports four operators with different configuration settings.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
Front Panel
MFJ MEMORY KEYER
MFJ-495
Q CQ CQ DE K5MFJ
[1A][2A][3A][4A]
F1
F2
F3
VOLUME
SPEED
F4
MENU
ON
PWR
OFF
POWER
Figure 1. MFJ-495 Front Panel.
•
LCD Display: A 2-line by 16-character alphanumeric display. It displays the keyer’s various menus
and the code being sent.
•
Menu Button: Time-sensitive and used to navigate through the various menus and to enter or exit
the setup menus.
•
Function Buttons: The general purpose Function buttons F1 to F4 perform the operations displayed
on the LCD above each corresponding buttons. They also use to navigate through the setup menus as
well as to change the keyer settings within the setup menus. These buttons are also time-sensitive.
Note: The F1 to F4 on the MFJ-495 will be referred to as “button” and the F1 to F4 on the
keyboard will be referred to as “key” throughout this manual.
•
Volume Control: Used to adjust the sidetone audio volume to the internal speaker and Audio Out
jack. Turn the control clockwise to increase the volume and counter-clockwise to decrease the
volume.
•
PWR LED: Illuminates when the power to the unit is on. It also blinks when the keyer is in
message program mode and command mode.
•
Speed Control: Used to adjust the code speed in a 2:1-to-20:1 ratio within the range of 5 to 99
WPM. Turn the control clockwise to increase speed and counter-clockwise to decrease speed.
Whenever the speed is changed using the front panel Speed control, the LCD momentarily displays
the change for approximately two seconds so you can see exactly what speed you just changed to.
Also, the Speed main menu is shown momentarily after the power is turned on, and then changes to
the last-used main menu.
•
Power Button: Used to turn the unit on and off. Press to turn power on; press again to turn power
off.
WARNING:
2
Do not turn the power on and off rapidly, otherwise the memory (keyer
settings) would be corrupted and the unit will have to reset to factory defaults
to function properly.
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Back Panel
+
MANUAL
KEY
KEYING
OUTPUT
SERIAL
PORT
MFJ ENTERPRISES, INC.
STARKVILLE, MS USA
KEYBOARD
AUDIO
OUT
KEY
INPUT
REMOTE
GND
DASH
DOT
F4
F3
F2
F1
MENU
POWER
12VDC
PTT
OUTPUT
Figure 2. MFJ-495 Back Panel.
•
Power: Accepts a standard 2.1 × 5.5 mm coaxial plug with positive center and negative sleeve. This
unit requires 12 volts DC. An optional 500 mA power supply, the MFJ-1315, is available from MFJ
Enterprises, Inc. This unit requires a minimum of 50 mA at no volume and without using a keyboard
and a maximum of 300 mA at maximum volume into an 8-ohm audio load with a typical keyboard. It
may require more current depending on the keyboard used; typical keyboard uses about 100 mA.
WARNING:
•
Do not apply voltages greater that 18 volts to this unit, or permanent damage
to the unit may result.
Audio Out: A 3.5 mm stereo phone jack for connecting to an external speaker or headphones. This
jack accepts both stereo and mono plugs. When this jack is used, the internal speaker is disabled. An
optional external speaker, the MFJ-281, is available from MFJ Enterprises, Inc.
WARNING:
To prevent suffering hearing damage when using headphones, turn the
Volume control to minimum before putting on the headphones and then
slowly adjust for a comfortable volume.
•
PTT Output: An RCA jack providing connection for a PTT (push-to-talk) output that goes low
when active. This jack is an open-drain output; an external pull-up can be used if so desired. Use a
quality-shielded cable for connection to this jack.
•
Keying Output: This unit supports both
positive and negative keyed radios. Use a
quality-shielded cable for connection to this
RCA jack. Consult your transmitter's manual
to determine if it uses direct (positive) or
grid-block (negative) keying.
Two jumpers JMP1 and JMP2 inside the unit
set the keying output to direct for positive
keyed radios (most solid-state radios) or to
grid-block for negative keyed radios (most
 2001-2012 MFJ Enterprises, Inc.
JMP1
JMP2
Keying Output
D
D
G
G
D
G
D
G
Direct
Invalid
Invalid
Grid Block
*
Table 1. Keying Output Jumpers.
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MFJ-495 Memory Keyer
Instruction Manual
radios with tube finals). Set both jumpers to the “D” positions for direct keying or to the “G”
positions for grid-block keying. If it is set wrong, the transmitter will either not key at all or key
continuously. The factory default * is direct keying output.
•
Manual Key: An RCA jack providing an input line for manually keyed devices, such as a straight
key or a computer interface. An internal jumper JMP3
configures this jack to accept active-low (for straight key)
JMP3
Manual Key
or active-high (output from computer software) input.
L
Active Low
Set this jumper to the “L” position for active-low input or
H
Active
High *
to the “H” position for active-high input. If it is set
wrong, the keyer will key continuously. The factory
Table 2. Manual Key Jumper.
default * is active-high.
•
Serial Port: Accepts a standard 9-pin serial plug for connecting the MFJ-495 to a computer for
ASCII file transfers or monitoring your sending on the computer screen. A 9-pin-to-9-pin serial cable
is needed. If your computer has a 25-pin serial port, use a 9-pin-to-25-pin adapter.
To communicate with the MFJ-495, use a terminal program on your computer that is capable of
transferring information in ASCII format. Configure the software for 1200 baud, 8 data bits, 1 stop
bit and no parity; set the flow control to Xon/Xoff.
•
Keyboard: Accepts most standard AT style keyboards (XT keyboard does not work with the MFJ495). The MFJ-551 keyboard is guaranteed to be fully compatible with the keyer and available from
MFJ Enterprises, Inc.
Two jumpers JMP4 and JMP5 inside the unit
JMP4
Keyboard Layout
configure the keyboard operation. Jumper
JMP4 selects whether a Qwerty or Dvorak
L
Qwerty
*
keyboard is used (see Figures 3 and 4 on next
H
Dvorak
page); place this jumper on the “L” position
JMP5
RepeatKey
for the Qwerty keyboard or on the “H”
position for the Dvorak keyboard. Jumper
L
Off
*
JMP5 set the RepeatKey feature that selects
H
On
whether or not to repeat a key when it is held
Table 3. Keyboard Jumpers.
down; place this jumper on the “L” position
to disable RepeatKey or on the “H” position
to enable RepeatKey. The factory defaults * are Qwerty keyboard and RepeatKey off.
•
Key Input: A ¼-inch stereo phone jack for connecting to a paddle. An iambic or single lever (dual
contact) paddle with a shielded cable should be used. When used with paddles, the dot wire should
be connected to the tip of the plug, the dash wire to the ring, and the ground wire to the shield.
•
Remote Port: The last port on the back of the unit is for the optional remote control. The remote
control gives you remote access to the keyer menu if the main unit is out of reach. The remote has
the menu and function buttons as well as the paddles connections. The remote connector combines
both the remote functions and the paddle jack so that only one cable from the paddle to the keyer is
needed.
4
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
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Instruction Manual
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Figure 3. Qwerty Keyboard Layout.
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Figure 4. Dvorak Keyboard Layout.
Connecting to a Computer
You may connect the MFJ-495 to a computer using the 9-pin DIN serial port on the back panel. If your
computer has a 25-pin serial port, you can use a 25-pin-to-9-pin adapter.
To use a computer with the MFJ-495, run a terminal program that will upload and download ASCII files,
and configure the terminal program to do so. Set the terminal program for 1200 baud, 8 data bits, one
stop bit and no parity; set the flow control to Xon/Xoff. If you see extraneous linefeeds on the computer
screen when receiving data from the MFJ-495, you may configure your software to strip out these extra
linefeeds.
During sending, the characters sent by the MFJ-495 are sent through the serial port, so you may use your
computer to monitor the transmitted copy. You may find this particularly convenient.
You also may upload and download text files between the MFJ-495 and your computer. For details on
this, see the discussion of “Uploading and Downloading Messages” on page 34.
 2001-2012 MFJ Enterprises, Inc.
5
MFJ-495 Memory Keyer
Instruction Manual
Basic Operation
The Memory Keyer is simple to operate. The Power button controls power to the unit. Start sending with
a paddle or keyboard. Adjust the volume and speed to your preference. If the speed is still too fast or too
slow, adjust the range of the Speed control using the Speed and Ratio commands.
All characters or code sent by the user are played on the sidetone speaker. This allows the user to hear
what he is keying, typing, or sending with a computer. Only when the keyer is used with a paddle is the
code sent as soon as it is keyed. When using a keyboard or keyer terminal, you may type ahead of the
code that is being transmitted. This allows you to enter words and phrases faster than the transmitted
code. This permits smoother code with less pauses because you can fix misspelled words and think of the
right phrase to use while your previous sentence is being sent.
When you are in command mode, memory save, or configuration mode, the code sent to the speaker is
not sent to the Keying Output or your radio. This keeps all erroneous code off of the air.
How to Use the Menu System
You may set up the MFJ-495 to perform any of its many functions by making the appropriate selections
from its menu system. This system consists of seven main menus and 22 setup menus. You make your
selections using the five buttons under the LCD display - Menu, F1/Previous ◄, F2/Next ►, F3/Down
▼, and F4/Up ▲. These buttons do the following:
•
Menu - Scrolls through the main and setup menus when press briefly. To enter the setup menu, press
and hold this button for two seconds. To exit the setup menu, press and hold this button for two
seconds to go back to the main menu.
•
F1/Previous - Selects the main menu command or the previous setup menu.
•
F2/Next - Selects the main menu command or the next setup menu.
•
F3/Down - Selects the main menu command or the previous item in a setup menu.
•
F4/Up - Selects the main menu command or the next item in a setup menu.
The main menus are arranged in a "wrap-around" structure, so that momentarily pressing the Menu button
will bring up another main menu in a sequence. Figure 5 shows the sequence of the main menus. When
power is turned on, the main menu displayed is the one that was displayed when the unit was last turned
off.
6
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
MENU BUTTON FLOW CHART
MAIN MENUS
[1A][2A][3A][4A]
[1B][2B][3B][4B]
[1C][2C][3C][4C]
[1D][2D][3D][4D]
SETUP MENUS
(Bank A)
(Bank B)
(Bank C)
(Bank D)
SPEED RATIO
OVERALL SPEED
FARNSWORTH
MENU
CCW WEIGHT
For 2 sec.
[5A][6A][7A][8A]
[5B][6B][7B][8B]
[5C][6C][7C][8C]
[5D][6D][7D][8D]
CW WEIGHT
(Bank A)
(Bank B)
(Bank C)
(Bank D)
CHAR SPACE
WORD SPACE
KEY COMPENSATION
MENU
MENU
COM DEC CXT PXT
[A] B
C
D
A [B] C
D
A
B [C] D
A
B
C [D]
or
(Bank A)
(Bank B)
(Bank C)
(Bank D)
KEY DELAY
PTT HANG TIME
TONE
SERIAL NUMBER
LEADING ZEROES
OTHER ZEROES
SPEED
NINES
IAMBIC
FARNSWORTH
MENU
REVERSE
For 2 sec.
PADDLE
WEIGHT
MONITOR
OUTPUT
TONE
QUEUE
USER
Press
Press
Press
Press
Press
to go to
previous
menu.
to go to
next
menu.
to
decrease
setting.
to
increase
setting.
MENU
to
navigate
menus.
BUTTON
ACTION
Press
MENU
+
F1
to select Bank A.
Press
MENU
+
F2
to select Bank B.
Press
MENU
+
F3
to select Bank C.
Press
MENU
+
F4
to select Bank D.
Press
MENU
+
DIT
to select MSG1-MSG4 main menu.
Press
MENU
+
DAH
to select MSG5-MSG8 main menu.
Figure 5. MFJ-495 Menu Flow and Button Action Chart.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
The setup menus are also arranged in a "wrap-around" structure, so that pressing the Previous or Next
button will bring up another setup menu in a sequence. Also, momentarily pressing the Menu button will
bring up the next setup menu. Figure 5 shows the sequence of the setup menus. When entering the setup
menus, the setup menu displayed is the one that was last used.
To see how the setup menu system works, consider the following example.
EXAMPLE: To enter the setup menu, press and hold the Menu button for two seconds. If the
display shows that you are in the Overall Speed menu, pressing the Next button would put you in
the Farnsworth menu and pressing the Previous button would put you in the Speed Ratio menu.
Pressing the Down or Up button would lower or raise the overall code speed. Once you have
selected the speed you desire, you may leave the setup menu by pressing the Menu button again
for two seconds; or press Previous or Next button to go to another setup menu.
Once you have made your choices within the setup menus, they will be saved in non-volatile memory for
your next session.
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 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
The Menus
Main Menus
The main menus allow you access to the commonly used functions. There are seven main menus
arranged in a “wrap-around” structure. When power on, keyer operation starts with the main menu that
was last used. The first two main menus (MSG1-MSG4 and MSG5-MSG8) let you play and save
messages. The next main menu allows you to enter command mode and tune modes directly as well as
decrement the serial number. The last four main menus give you easier access to the frequently adjusted
settings and display their current values. For the first three main menus, the four function buttons take on
different meanings and perform the operations displayed directly above each button. Within each main
menu, press the Menu button briefly to view the next main menu. Press and hold the Menu button for
two seconds to enter the setup menus (see below).
MSG1-MSG4 Buttons
This is the first message menu that consists of four messages buttons, where the digit (1-4) is the message
number and the letter (A-D) is the current memory bank. For example, [1A] is message number 1 of bank
A. To play a message, press and release the corresponding message button. To save a message, press and
hold a message button for two seconds until the keyer responds with “GO” (dah-dah-dit dah-dah-dah).
You may then key in a message using the paddle, keyboard or terminal. Refer to “The Memory” section
on page 36 for explanation of the MFJ-495’s message memory.
MSG5-MSG8 Buttons
This is the second message menu that consists of another four messages buttons, where the digit (5-8) is
the message number and the letter (A-D) is the current memory bank. For example, [8D] is message
number 8 of bank D. To play a message, press and release the corresponding message button. To save a
message, press and hold a message button for two seconds until the keyer responds with “GO” (dah-dahdit dah-dah-dah). You may then key in a message using the paddle, keyboard or terminal. Refer to “The
Memory” section on page 36 for explanation of the MFJ-495’s message memory.
Command [COM] Button
Use to enter the command mode and the keyer will respond with “CO” (dah-di-dah-dit dah-dah-dah).
When a valid command is entered, the keyer will respond with “R” (di-dah-dit) when appropriate. If an
invalid command is entered, it will respond with an error character (di-di-di-di-di-di-di-dit). See the “The
Paddle” section on page 16 for more details on setup commands.
Decrement [DEC] Button
Use to decrement the serial number by one, effectively canceling the automatic increment applied when
last played from a message. The decrement function accommodates re-sending the last serial number, as
might be needed when a repeat of a contest exchange is requested, or canceling the exchange with a
station that proved to be a “dupe”. The unit will echo a "D" (dah-di-dit) for every number that is
decrement. Decrement serial number 0001 rolls over to 9999, because the number 0000 is not used.
Carrier Tune [CXT] Button
Use to engage the carrier tune mode. The keyer will key continuously to tune your station. Press any
button, paddle or key to exit.
Pulse Tune [PXT] Button
Use to engage the pulse tune mode. The keyer will send a continuous string of pulses to tune your
station. The rate (speed of 50 to 99 WPM) and the duty cycle (weight of 1% to 35%) of the pulses can be
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
adjusted with the function buttons. Press F1 button to decrease speed and F2 button to increase speed.
Press F3 button to decrease weight and F4 button to increase weight. Press Menu button, either paddle or
the ESC key to exit.
Speed
This menu is placed in the main menus to allow easier access to change the overall speed for the current
position of the Speed control in the range of 5 to 99 WPM. The speed shown on the display corresponds
to the current position of the Speed control. When SPEED is displayed, press the Down button will
decrease the overall sending speed and the Up button will increase it. Note that setting the overall speed
higher than or equal to the Farnsworth speed will disable Farnsworth spacing.
Whenever the speed is changed using the front panel Speed control, the LCD momentarily displays the
change for approximately two seconds so you can see exactly what speed you just changed to. Also, the
Speed main menu is shown momentarily after the power is turned on, and then changes to the last-used
main menu.
Farnsworth
This menu is placed in the main menus to allow easier access to change the Farnsworth speed in the range
of 10 to 99 WPM. When FARNSWORTH is displayed, press the Down button will decrease the
Farnsworth speed and the Up button will increase it. The Farnsworth speed must be higher than the
overall speed. To turn Farnsworth off, reduce the Farnsworth speed to the same speed as the overall
speed.
Weight
This menu is placed in the main menu to allow easier access to change the weight of code elements in the
range of 25% to 75%. Weight is the duty cycle of a continuous string of dots, which is 50% for perfect
code. The weight shown on the display corresponds to the current position of the Speed control. When
WEIGHT is displayed, press the Down button will decrease the code weight and the Up button will
increase it. Notice that adjusting the weight here changes both the CCW Weight and CW Weight to the
same percentage, resulting in a constant code weight. A higher weight produces a heavier sound, and a
lower weight causes characters to sound lighter. Once set, weight remains constant and independent of
the speed. For variable weight that adjusts with the speed, use the CCW Weight and CW Weight setup
menus (see below).
Tone
This menu is placed in the main menu to allow easier access to change the audio frequency of the
sidetone in the range of 305 to 1006 Hz. When TONE is displayed, press the Down button will decrease
the sidetone frequency and the Up button will increase it. Most people prefer 700 to 800 Hz sidetone.
Changing Memory Banks
To change the memory banks from any main menu, press and hold the Menu button and then within two
seconds press the F1 button for bank A, F2 button for bank B, F3 button for bank C, or F4 button for bank
D. The keyer will respond with “BA”, “BB”, “BC” or “BD” for the selected bank. Each memory bank
has eight message memories (see “The Memory” section on page 36 for more details).
Miscellaneous
A shortcut to the message menus from any main menu is to press and hold the Menu button and then
within two seconds press the Dit paddle to select the MSG1-MSG4 menu or press the Dah paddle to
select the MSG5-MSG8 menu.
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During message playback, the third main menu COM DEC CXT PXT will change to [A] [B] [C]
[D]. Notice there is only one set of “[” and “]” that indicates the current memory bank. To change to
another memory bank during playback, press the corresponding function button.
Setup Menus
The setup menus allow you to set up how the MFJ-495 works and behaviors. There are 22 setup menus
arranged in a “wrap-around” structure. To access these setup menus, press and hold the Menu button for
two seconds. The setup menu that will display is the one that was last used. When finishing, press and
hold the Menu button for two seconds to go back to the main menus for normal operation. The LED will
blink to indicate that you are in the setup menus. The Keying Output and PTT Output are also disabled.
Within each setup menu:
•
•
•
Press the Menu button briefly to view the next setup menu; press and hold the Menu button for two
seconds to exit the setup menu and go back to the main menu.
Press the Next button to view the next setup menu; press the Previous button to view the previous
setup menu.
Press the Up or Down button to change the setting for that setup menu.
Speed Ratio
The Speed Ratio menu is used to set the speed ratio of the Speed control in the range of 2:1 to 20:1. This
ratio is the speed at the full clockwise position to that at the full counter-clockwise position. With
minimum overall speed of 5 WPM, a ratio of 20:1 will cover the entire speed range of 5 to 99 WPM.
Default speed ratio is 3:1 making the Speed control less sensitive and easier to adjust the code speed.
Overall Speed
The Overall Speed menu allows you to set the code speed for the current position of the Speed control in
the range of 5 to 99 words per minute (WPM). There are three numbers on line two of the display. The
first number is the speed at the full counter-clockwise position of the Speed control; the second number
enclosed within “[” and “]” is the speed corresponding to the current position of the Speed control; and
the last number is the speed at the full clockwise position of the Speed control. You can also adjust the
Speed control to where you want it to match the speed shown on the display.
By "overall" speed, we mean the speed at which the words are sent. A "word" is defined as 50 units of
time, and the word "PARIS" is exactly 50 units in length. Therefore, if "PARIS" is sent 13 times in one
minute, the sending speed is 13 WPM. Standard Morse code timing defines a dit as one unit of time and a
dah as three units of time. Within each character, there is one unit between elements (dits and dahs).
Three units separate characters and seven units separate words. Farnsworth spacing (see below) will
increase the amount of time between characters and words. Note that setting the overall speed greater
than or equal to the Farnsworth speed will disable Farnsworth spacing.
Farnsworth
The Farnsworth menu allows you to disable or enable Farnsworth mode and set the Farnsworth speed
(character speed) in the range of 10 to 99 WPM. When Farnsworth mode is enabled, characters (dots,
dashes, and intra-character spaces) are sent at the Farnsworth speed, but the spacing between characters
and words is increased to produce a slower overall speed. This technique is useful for helping the novice
learn the sounds of the code characters and avoid the tendency of counting individual dots and dashes.
The Farnsworth speed is always higher than the overall speed. As a result, Farnsworth mode (if enabled)
is automatically disabled when the overall speed is changed to one that is greater than or equal to the
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current Farnsworth speed. Also, Farnsworth speed cannot be enabled when the overall speed is at its
maximum of 99 WPM.
CCW Weight
The CCW Weight menu is used to set the code weight at the counter-clockwise (CCW) position of the
Speed control. There are three numbers on line two of the display. The first number enclosed within “[“
and “]” is the CCW weight; the second number is the weight corresponding to the current position of the
Speed control; and the last number is the CW weight. Constant weighting is achieved when all three
numbers are the same.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher weight
produces a heavier sound and a lower weight causes characters to sound lighter. Weight can be set to
remain constant and independent of speed, or it can be set to vary with the code speed.
CW Weight
The CW Weight menu is used to set the code weight at the clockwise (CW) position of the Speed control.
There are three numbers on line two of the display. The first number is the CCW weight; the second
number is the weight corresponding to the current position of the Speed control; and the last number
enclosed within “[“ and “]” is the CW weight. Constant weighting is achieved when all three numbers are
the same.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher weight
produces a heavier sound and a lower weight causes characters to sound lighter. Weight can be set to
remain constant and independent of speed, or it can be set to vary with the code speed.
25% Weight
50% Weight
75% Weight
Figure 6. Code Weight.
Character Space
The Character Space menu is used to increase the character space (normally three units) up to 12 units
long. There are two numbers on line two of the display; the number enclosed within “[“ and “]” is the
character spacing and the other number is the word spacing. Note the character space is always at least
four units shorter than the word space. So you might have to increase the word spacing before adjusting
the character space.
Word Space
The Word Space menu is used to increase the word space (normally seven units) up to 16 units long.
There are two numbers on line two of the display; the number enclosed within “[“ and “]” is the word
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spacing and the other number is the character spacing. Note the word space is always at least four units
longer than the inter-character space.
Keying Compensation
The Keying Compensation menu is used to increase the keying on-time and decrease the keying off-time
up to 25 milliseconds (ms). Some radios have a key delay of 5 ms or more. By setting 5 milliseconds of
compensation, the keyer will add 5 ms to the dots and dashes and subtract 5 ms from the intra-character
spaces. Although similar to increasing weight, this adjustment is independent of the speed. This setting
is used primarily to correct keying distortion by certain transceivers and to eliminate the problems with a
transmitter key delay.
Keying Delay
The Keying Delay menu is used to delay the keying output up to 20 milliseconds. This setting is used
primarily to accommodate switching delay in certain station setup. It is used in conjunction with the PTT
line to delay the keying output until all the switching is finished; that is, the keying output is lagged
behind the sidetone audio and the PTT output. This controls the time between when PTT is asserted and
when CW keying will start.
PTT Hang Time
The PTT Hang Time menu is used to set the PTT hang time from 1 to 9999 milliseconds. This controls
the time between when CW keying is ended and when the PTT will de-assert. You may adjust this to
your liking for on-the-air sending. Press the Up and Down buttons to change time in increments of 1 ms;
press and hold the Up and Down buttons to change time in increments of 100 ms.
Note: If Keying Delay and PTT Hang Time are equaled to zero, the PTT Output waveform will be
identical to the Keying Output waveform.
Sidetone Audio
PTT Output
Keying Delay
PTT Hang Time
Keying Output
Figure 7. Keying Delay and PTT Hang Time Timing.
Tone
The Tone menu allows you to set the audio frequency in the range of 305 to 1006 Hz. The MFJ-495
features smooth, clean audio, with sine wave output, instead of the harsh square wave audio used by many
other keyers. Also, the MFJ-495 produces each dit and dah with a rise and decay time of approximately
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5 milliseconds, avoiding the "spikes" that cause distracting key clicks. The MFJ-495's audio sounds like
that of a good CW transceiver.
Keying Output
Rise Time
Decay Time
Sidetone Audio
Figure 8. Rise Time and Decay Time Timing.
Serial Number
The Serial Number menu allows you to set the current serial number from 0001 to 9999. Press the Up
and Down buttons to change number in increments of 1; press and hold the Up and Down buttons to
change number in increments of 100. Only three digits are sent for numbers below 1000—use leading
zeroes when appropriate. The serial number is automatically post-incremented each time it is sent. Serial
number 9999 will wrap-around to 0001, skipping 0000 since it is not used. Use Leading Zeroes, Other
Zeroes and Nines menus to control the way zeroes and nines in the serial number are sent (see below).
There are a four-digit number and three single characters on line two of the display. The four-digit
number enclosed within “[” and “]” is the serial number.
Leading Zeroes
The Leading Zeroes menu is used to set whether the leading zeroes in the serial number are sent as “0”,
“O”, “T” or not at all. There are a four-digit number and three single characters on line two of the
display. The character enclosed within “[” and “]” is the replacement for the leading zeroes in the serial
number.
Other Zeroes
The Other Zeroes menu is used to set whether the non-leading zeroes in the serial number are sent as “0”,
“O” or “T”. There are a four-digit number and three single characters on line two of the display. The
character enclosed within “[” and “]” is the replacement for the other zeroes in the serial number.
Nines
The Nines menu is used to set whether the nines in the serial number are sent as “9” or “N”. There are a
four-digit number and three single characters on line two of the display. The character enclosed within
“[” and “]” is the replacement for the nines in the serial number.
Iambic
The Iambic menu allows you to enable or disable iambic operation. Iambic operation allows you to
squeeze both paddles and get alternating dots and dashes. There are two different types of iambic keying,
and both are available. The difference in behavior of these two modes occurs when both paddles are
squeezed and then released. In iambic A mode, the keyer will simply complete the element (dot or dash)
in progress, and then stop sending. In iambic B mode, the keyer will complete the element in progress,
and then send an additional opposite element. For example, a release during the dash produces "dit-dah"
(A) in iambic A mode but produces "dit-dah-dit" (R) in iambic B mode. Non-iambic mode does not
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alternate between dots and dashes during a squeeze. It plays whatever side made contact first until it is
released. That is, when iambic mode is disabled there are no dot and dash memories.
Reverse
The Reverse menu allows you to reverse the paddles designation. When using paddles, the MFJ-495
normally expects the dot paddle to be connected to the tip of the plug and the dash paddle to be connected
to the plug's ring. If your paddles are wired in the opposite manner, or you wish to change between right
and left-handed operators, you may turn Reverse ON to switch the paddle functions. You can also set this
mode by simply pressing the paddle you desire to designate as the dot paddle.
Paddle
The Paddle menu allows you to select how the paddle works. With the automatic option, the keyer
functions as an iambic keyer for use with a dual-lever paddle. As an iambic keyer, the MFJ-495 has dot
and dash memories, for "squeeze keying," and functions just like other iambic keyers, both standalone
keyers and those built into radios. With the semi-auto option, the keyer can be used with a single-lever
key, with dots generated automatically and dashes formed manually by the user. This emulates the
function of a mechanical semi-automatic "bug." You also may use this unit with a straight key or a bug,
connect the straight key or bug to the ground and the dash line. With the hand-key option, both the dot
and dash lines can be used to connect to a straight key. Notice hand-key mode may not be used to enter
messages or setup commands.
Note: In hand-key mode using the paddle, the MFJ-495 will not display the code sent or record to the
keyer memory. Also, the difference between this and the Handkey command is that this
command affects the paddle only.
Monitor
The Monitor menu is used to toggle the sidetone speaker on and off. If the sidetone is turned off, it will
still play command messages and status information. To conserve power, the keyer should be operated
with the monitor off in favor of the rig’s sidetone.
Output
The Output menu is used to toggle the keying output on and off. If the output is turned off, no signal goes
to the Keying Output or the PTT Output to allow practice operation. The output is temporarily disabled
during memory message storing, command mode operation, status information, and keyer setup.
Queue
The Queue menu is used to toggle the message queue on and off. Queue mode enables the user to load
messages into a buffer to play sequentially. In queue mode, if you press a message button while a
message is playing, that message will play after the current message is done. When queue mode is off,
pressing a message button will abort any message being played and play the new message. When on, up
to 16 button presses are stored in order and acted upon in succession as each message is completed.
Note: Disabling the queue mode increases the message stack size to 24 levels deep used by the
embedded Call command.
User
The User menu selects one of four user-configurations to be used as the current setting. This provides
support for four operators with different configuration settings, such as speed, weight, etc. This allows up
to four operators to use the keyer without having to reconfigure all the settings for each operator. It also
supports four different configuration settings for different contest exchanges.
Note: The only thing that is shared among all four users is the message memories.
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The Paddle
Using the MFJ-495 with a Paddle
Plug an iambic or single lever paddle into the Key Input jack of the MFJ-495. A ¼-inch stereo phone
plug and a two-conductor shielded cable should be used. If separate shielded cables are used, the two
shields should be tied together and connected to ground. The dot wire should be connected to the tip of
the plug and the dash wire to the ring. Begin sending code using the paddles. If you would like to change
speed, sidetone or weight, see the sections pertaining to these commands.
The iambic paddle has a unique feature that the single lever paddle does not have. Notice that the two
paddles are independent and can be squeezed together. Both the dot and dash contacts touch the chassis,
therefore ground. The MFJ-495 senses this happen and uses it as a separate keying mode.
Iambic keying has two modes: A and B. When a squeeze is released during an element (dot or dash),
iambic B adds an opposite element. Iambic A just finishes the element in progress and does not produce a
following alternate element.
The dot and dash memories make sending easier. The memories allow the user to key a dot before the
completion of a dash and vice versa. This feature can be checked by setting the keyer to the lowest speed
and tapping first the dash lever and then the dot lever before the completion of the dash. The keyer will
provide both the dash and the dot. The dash memory can be checked in a similar manner. The dot
insertion feature allows the user to insert a dot by tapping the dot lever while holding the dash lever in.
The dash insertion feature allows the user to insert a dash while holding the dot lever in. The iambic
operation allows sending alternate dots and dashes when both levers are squeezed. The first lever
contacted will determine whether a dot or dash occurs first.
Note: It is recommended the Farnsworth mode be disabled when sending with the paddle. When
Farnsworth mode is enabled, the paddle will send code at the Farnsworth speed, not the overall
speed.
Setup Commands
Press the [COM] button and the keyer responds with “CO” (dah-di-dah-dit dah-dah-dah). A tilde
character “~” will appear on the display. A setup command can then be entered using your paddle. If the
command is invalid then the keyer will send an error character (di-di-di-di-di-di-di-dit) and return the
keyer to normal mode. If the command is valid, the keyer will send an “R” (di-dah-dit). If the user
wishes to re-attempt modifying features using command mode, he must re-enter command mode by
pressing the [COM] button again. If you enter the command mode accidentally, press the [COM] button
at any time to exit. Refer to the appendix “Setup Commands” on page 48 for a table of these commands.
B#
Bank – selects the current memory bank, where # is A, B, C or D. Each memory bank has
eight message blocks of 256 characters each, except the last block.
C#
Character space – increases the inter-character space with # standard intra-character spaces,
where # is a single digit from 0 to 9. This allows the normally three-unit long inter-character
space up to 12 units long. Note the inter-character space is always at least four units shorter
than the word space. Therefore, you might have to increase the word spacing before
adjusting the character space.
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D
Decrement – decrements the serial number by one, effectively canceling the automatic
increment applied when last played from a message. The decrement function accommodates
re-sending the last serial number, as might be needed when a repeat of a contest exchange is
requested, or canceling the exchange with a station that proved to be a “dupe”. The unit will
echo a "D" (dah-di-dit) for every number that is decrement. Decrement serial number 0001
rolls over to 9999, because the number 0000 is not used. Alternately, press the [DEC] button
also decrements the serial number.
E##
Edit – allows the operator to append onto or edit an existing message memory, where the first
# is the message number 1 to 8 and the second # is the bank A to D. The keyer will display
your message to the last word. You can then paddle in more text or erase existing words, just
like the procedure when loading a message.
F##
Farnsworth – uses to enable Farnsworth mode and spacing. Farnsworth spacing adds more
time between characters to slow down the overall sending speed. The advantage of this is
that, by hearing the characters sent at a faster speed, you learn to recognize each character by
its distinctive rhythm, rather than by trying to "count dits." This greatly assists you in
copying Morse code at higher speeds. The Farnsworth speed, however, must be higher than
the overall speed. Setting ## to 00 or less than or equal to the overall speed will disable
Farnsworth mode.
Note: It is recommended the Farnsworth mode be disabled when sending with the paddle.
When Farnsworth mode is enabled, the paddle will send code at the Farnsworth
speed, not the overall speed.
G#
Gap (word space) – increases the word space with # standard intra-character spaces, where #
is a single digit from 0 to 9. This allows the normally seven-unit long word space up to 16
units long. Note the word space is always at least four units longer than the inter-character
space.
H
Hand key – enters the hand key mode to use the paddle as a hand (straight) key. Dots and
dashes are made manually by using either lever of the paddle. That is, keying follows closure
of the dot or dash paddle, allowing hand-sent code. Normal keyer operation is regained by
squeezing both paddles.
I#
Iambic – enables iambic mode A or B where # represents A or B, or disables iambic
operation with # = N.
J####
PTT hang time – sets the PTT (push-to-talk) hang time to #### millisecond, where ####
represents four digits in the range of 0001 to 9999. This controls the time between when CW
keying is ended and when the PTT will de-assert. You may adjust this to your liking for onthe-air sending.
K##
Keying compensation – sets the keying compensation to ## millisecond, where ## represents
two digits in the range of 00 to 25. Some radios have a key delay of 5 ms or more. By
entering K05, the keyer will add 5 ms to the dots and dashes and subtract 5 ms from the intracharacter spaces. Although similar to increasing weight, this adjustment is independent of the
speed. This setting is used primarily to correct keying distortion by certain transceivers and
to eliminate the problems with a transmitter key delay.
L##
Lag (keying delay) – sets the keying delay to ## millisecond, where ## represents two digits
in the range of 00 to 20. This setting is used primarily to accommodate switching delay in
certain station setup. It is used in conjunction with the PTT line to delay the keying output
until all the switching is finished; that is, the keying output is lagged behind the sidetone
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audio and the PTT output. This controls the time between when PTT is asserted and when
CW keying will start.
M#
Monitor – enables (#=Y) or disables (#=N) the sidetone monitor, or toggles the sidetone
monitor on or off without keying the #. If the sidetone is turned off, it will still play
command messages and status information. To conserve power, the keyer should be operated
with the monitor off in favor of the rig’s sidetone.
N####
Number – sets the serial number. You must enter four numbers, most significant digit first.
All numbers must be in the proper Morse code format. For example, the number "1" must be
"di-dah-dah-dah-dah" and the number "0" must be "dah-dah-dah-dah-dah". The serial
number can be set from 0000 to 9999 (0000 will be converted to 0001).
O#
Output – enables (#=Y) or disables (#=N) the keying output, or toggles the keying output on
or off without keying the #. If the output is turned off, no signal goes to the Keying Output or
the PTT Output to allow practice operation. The output is temporarily disabled during
memory message storing, command mode operation, status information, and keyer setup.
P#
Paddle – selects paddle mode of automatic (#=A), semi-automatic (bug, #=S) or hand-key
(#=H) mode. With the automatic option, the keyer functions as an iambic keyer for use with
a dual-lever paddle. As an iambic keyer, the MFJ-495 has dot and dash memories for
"squeeze keying" and functions just like other iambic keyers, both standalone keyers and
those built into radios. With semi-auto option, the keyer can be used with a single-lever key,
with dots generated automatically and dashes formed manually by the user. This emulates
the function of a mechanical semi-automatic "bug." You also may use this unit with a
straight key or a bug, connect the straight key or bug to the ground and the dash line. With
the hand-key option, both the dot and dash lines can be used to connect to a straight key.
Notice hand-key mode may not be used to enter messages or commands.
Note: In hand-key mode using the paddle, the MFJ-495 will not display the code sent or
record to the keyer memory. Also, the difference between this and the Hand-key
command is that this command affects the paddle only.
Q#
Queue – enables (#=Y) or disables (#=N) the message queue, or toggles the message queue
on or off without keying in #. Queue mode enables the user to load messages into a buffer to
play sequentially. In queue mode, if you press a message button while a message is playing,
that message will play after the current message is done. When queue mode is off, pressing a
message button will abort any message being played and play the new message. When on, up
to 16 button presses are stored in order and acted upon in succession as each message is
completed.
Note: Disabling the queue mode increases the message stack size to 24 levels deep used
by the embedded Call command.
R##
Ratio – sets the speed ratio of the Speed control, where ## represents two digits in the range
of 02 to 20. The speed at the full clockwise position of the control is ## times that of the
speed at the full counter-clockwise position.
S##
Speed – sets the overall code speed to ## WPM, where ## represents two digits in the range
of 05 to 99. By "overall" speed, we mean the speed at which the words or groups are sent. A
"word" is defined as 50 units of time, and the word "PARIS" is exactly 50 units in length.
Therefore, if "PARIS" is sent 13 times in one minute, the sending speed is 13 wpm.
Standard Morse code timing defines a dit as one unit of time and a dah as three units of time.
Within each character, there is one unit between elements (dits and dahs). Three units
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separate characters and seven units separate words. Farnsworth spacing (see above) will
increase the amount of time between characters and words. Note that setting the overall
speed greater than or equal to the Farnsworth speed will disable Farnsworth spacing.
T##
Tone – sets the sidetone frequency to approximately ##0 Hz, where ## represents two digits
in the range of 30 to 99. The MFJ-495 features smooth, clean audio, with sine wave output,
instead of the harsh square wave audio used by many other keyers. Also, the MFJ-495
produces each dit and dah with a rise and decay time of approximately 5 milliseconds,
avoiding the "spikes" that cause distracting key clicks. The MFJ-495's audio sounds like that
of a good CW transceiver.
T
Tone – sets the sidetone frequency in the range of approximately 300 to 1000 Hz. Press the
dash paddle to raise the sidetone frequency; press the dot paddle to lower. Squeeze both
paddles to exit. Notice an alternating series of dots and dashes are sent to the sidetone
monitor to assist in the setting of the desired sidetone frequency.
U#
User – selects the current user, where # represents the digit 1 to 4. User mode is provided to
support four operators with different configuration settings, such as speed, weight, etc. This
allows up to four operators to use the keyer without having to reconfigure all the settings for
each operator. It also supports four different configuration settings for different contest
exchanges.
V
reVerse – reverses the sense of the dot and dash paddles. When using paddles, the MFJ-495
normally expects the dot paddle to be connected to the tip of the plug and the dash paddle to
be connected to the plug's ring. If your paddles are wired in the opposite manner, or you wish
to change between right and left-handed operators, you may reverse the paddles.
W####
Weight – sets the automatic code weighting between ## percent at the counter-clockwise
position and ## percent at the clockwise position of the Speed control, where each ##
represents two digits in the range of 25 to 75. Weighting varies linearly with the overall
speed (automatic weight). Set both ## to the same value for constant weight, where
weighting is independent of the overall speed.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher
weight produces a heavier sound and a lower weight causes characters to sound lighter.
Weight can be set to remain constant and independent of speed, or it can be set to vary with
the code speed.
X
Xmit (carrier tune) – gives continuous key-down for adjusting transmitter or antenna tuner.
Tap either paddle to exit and release the key line.
Y
Pulse tune – gives continuous adjustable pulses for adjusting transmitter or antenna tuner.
Press F1 and F2 buttons to change the speed in the range of 50 to 99 WPM. Press F3 and F4
buttons to change the weight (duty cycle) in the range of 1% to 35%. Tap either paddle to
exit and release the key line.
Z###
Zeros and nines – sets the way zeros and nines in the serial number are sent. The first # sets
whether to send the leading zeros as "0", "O", "T" or not at all by setting # to "N". The
second # sets whether the other zeros are sent as "0", "O" or "T". The last # sets whether the
nines are sent as "9" or "N". For example, "ZO09" will send the leading zeros as "O" (dahdah-dah), the other zeros as "0" (dah-dah-dah-dah-dah), and the nines as "9" (dah-dah-dahdah-dit).
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Message Memory
To play or save to a message memory, select the correct bank by pressing the Menu button together with a
function button. To play a message, press and release the corresponding message button (1 - 8). The
message will play and send to your radio. To save a message to memory, press and hold a message
button for two seconds until the keyer plays "GO" (dah-dah-dit dah-dah-dah) in Morse code. You may
now key in a message using the paddle.
Begin keying your message. As you pause after every word, the keyer will insert a word break. If the
keyer does not recognize your code as a valid character, the keyer will display a block character and that
character will not be saved. Continue keying in the rest of the word.
If you make a mistake entering a word, you can back up over it by keying in at least 10 continuous dots.
The keyer will erase the previous word. Also, press the Menu button momentarily will delete the last
character; press and hold the Menu button for two seconds will delete the last word.
At the end of your message, press and hold any of the four message buttons for two seconds to end your
message. The keyer will respond by sending an end-of-message character (di-dah-di-dah-dit) and
automatically insert “]” to the end of your message.
Refer to “The Memory” section on page 36 for explanation of the MFJ-495’s message memory and how
to use the embedded commands to enhance your message.
20
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
The Keyboard
Using the MFJ-495 with a Keyboard
When you plug in a standard IBM style AT keyboard, your keyer becomes a powerful keyboard keyer.
The MFJ-495 uses the letter keys A-Z, the number keys 0-9, the function keys F1-F12, the space bar, the
arrow keys, and the punctuation characters that have Morse equivalents. Prosigns have been assigned to
some of the other punctuation characters for quick operation. See the appendix “Morse Code Character
Set” on page 45.
The operation of the keyboard is simple. Begin typing on the keyboard. Typed characters are sent at the
code speed of the keyer. If a typing mistake occurs, the BACK SPACE key can be pressed to erase the
last character before it is sent. If you want to purge all the text in the buffer that has not yet been sent,
press the ESC key. Pressing PAUSE during transmission stops playback of the buffer text and allows
entry with the paddle; press ESC once resumes playback of the buffer text from where it was interrupted
(pressing ESC twice will abort the message playback).
When typing speed is greater than the code speed, characters will begin to fill a type-ahead buffer. The
code sent to the radio and over the sidetone speaker will lag behind the typing of each character. Most of
the time this will not cause a problem. Only for very fast typists that send slow code will the type-ahead
buffer fill significantly. The maximum size of the type-ahead buffer is 190 characters. When the buffer
fills to 180 characters, the sidetone will be higher. This is a signal to slow typing speed because when the
buffer fills to 190 characters each new key-press will be lost. It is best to never type much faster than
your code speed.
Transmitted characters and type-ahead buffer memory may be monitored using the LCD display on the
MFJ-495. This readout is comprised of two lines of text, each containing 16 characters. The top line
shows the characters currently being transmitted. The bottom line shows the content of the type-ahead
buffer memory; this buffer line is toggled on and off with the PRINT SCREEN key. Note that non-ASCII
characters, such as CTRL, ALT, SHIFT, etc., are displayed as a block character on the buffer line.
If you want to send a special prosign, you can enclose it in “<” and “>”. To make a special prosign, begin
the prosign with “<”, type the characters of the prosign, and end the prosign with “>”. For example, to
make the prosign SN types <SN>. This will remove the inter-character spaces between the characters
making it a prosign. Any prosign can be made this way, even special local prosigns. Another method is
to enclose the prosign with backslashes such as \SN\. An easier way to send special prosign is press ALT
key, type the characters of the prosign, and then release the ALT key (this method does not work within
the terminal program as the ALT key is reserved for other functions).
Note: The open angle bracket “<” enables prosign mode and the close angle bracket “>” disables
prosign mode; while the backslash “\” toggles the prosign mode on and off. In addition,
pressing the ALT key enables prosign mode and releasing disables it. A word space also
disables prosign mode.
Keyboard Key Combinations
Press a modifier key (CTRL, ALT or SHIFT) in combination with another key to perform special
functions or shortcuts. Note that these key combinations do not work in the Terminal mode, because
these modifier keys are reserved for the computer uses.
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MFJ-495 Memory Keyer
Instruction Manual
Key
Normal
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
 LEFT
 RIGHT
 DOWN
 UP
ESC
BACK SPACE
ENTER
PRINT SCREEN
PAUSE
~
\
<
>
–
+ or =
a
A
b
B
c
C
d
D
e
E
f
F
g
G
h
H
i
I
j
J
k
K
l
L
m
M
n
N
o
O
p
P
q
Q
r
R
s
S
t
T
u
U
v
V
w
W
x
X
y
Y
z
Z
Play Message 1
Play Message 2
Play Message 3
Play Message 4
Play Message 5
Play Message 6
Play Message 7
Play Message 8
Select Bank A
Select Bank B
Select Bank C
Select Bank D
Decrease Setting
Tone –1 Step
Increase Setting
Tone +1 Step
Decrease Setting
Tone –5 Step
Increase Setting
Tone +5 Step
Abort/Cancel/Exit
Delete Character
End Message
Display Type-Ahead
Pause
Enter setup command mode
Toggle prosign mode
Enable prosign mode or Decrease setting
Disable prosign mode or Increase setting
Decrease setting
Increase setting
[
]
Use the close square bracket “]” to end message allowing carriage returns in messages
End message if selected by the open square bracket “[”
22
Shift
Alt
Ctrl
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Custom Prosign
Select User 1
Select User 2
Select User 3
Select User 4
Toggle Monitor
Toggle Output
Toggle Queue
Enter Carrier Tune
Get Quick Speed 1
Get Quick Speed 2
Get Quick Speed 3
Get Quick Speed 4
Weight –1%
Weight +1%
Weight –5%
Weight +5%
Set Bank
Set Character Space
Decrement Number
Edit Message
Set Farnsworth
Set Word Space (Gap)
Hand Key
Set Iambic
Set Hang Time
Set Key Compensation
Set Key Delay (Lag)
Set Monitor
Set Number
Set Output
Set Paddle
Set Queue
Set Ratio
Set Speed
Set Tone
Set User
Reverse
Set Weights
Carrier Tune (Xmit)
Pulse Tune
Set Zeroes & Nines
Program Message 1
Program Message 2
Program Message 3
Program Message 4
Program Message 5
Program Message 6
Program Message 7
Program Message 8
Set Quick Speed 1
Set Quick Speed 2
Set Quick Speed 3
Set Quick Speed 4
Speed –1 WPM
Speed +1 WPM
Speed –5 WPM
Speed +5 WPM
Delete Word
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Note: The  (UP),  (DOWN),  (LEFT), and  (RIGHT) keys are referred to as the Arrow keys
in this manual.
Setup Commands
Press the tilde “~” key to enter command mode and the keyer responds with “CO” (dah-di-dah-dit dahdah-dah). Enter a setup command. If the command is invalid then the keyer will send an error character
(di-di-di-di-di-di-di-dit) and return the keyer to normal mode. If the user wishes to re-attempt modifying
features using command mode, he must re-enter command mode by pressing “~” key again. If you enter
the command mode accidentally, press ESC key to exit. At any time, press ENTER to accept and exit or
press ESC to cancel and exit. Alternately, pressing CTRL+Key to directly enter the command mode; that
is, CTRL+S is the same as “~S”. To perform this action, press and hold the CTRL key, press a letter key
B to Z, and then release the CTRL key. Refer to the appendix “Setup Commands” on page 48 for a table
of these commands.
B#
Bank – selects the current memory bank, where # is A, B, C or D. Each memory bank has
eight message blocks of 256 characters each, except the last block. Alternately, press F9 to
select bank A, F10 for bank B, F11 for bank C, and F12 for bank D.
C#
Character space – increases the inter-character space with # standard intra-character spaces,
where # is a single digit from 0 to 9. This allows the normally three-unit long inter-character
space up to 12 units long. Note the inter-character space is always at least four units shorter
than the word space. Therefore, you might have to increase the word spacing before
adjusting the character space.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the character spacing,
or enter one digit 0 to 9 to set the character spacing. Press ENTER to accept and exit, or
press ESC to cancel and exit.
D
Decrement – decrements the serial number by one, effectively canceling the automatic
increment applied when last played from a message. The decrement function accommodates
re-sending the last serial number, as might be needed when a repeat of a contest exchange is
requested, or canceling the exchange with a station that proved to be a “dupe”. The unit will
echo a "D" (dah-di-dit) for every number that is decrement. Decrement serial number 0001
rolls over to 9999, because the number 0000 is not used.
E##
Edit – allows the operator to append onto or edit an existing message memory, where the first
# is the message number 1 to 8 and the second # is the bank A to D. The keyer will display
your message to the last word. You can then enter more text or erase existing words, just like
the procedure when loading a message.
F##
Farnsworth – uses to enable Farnsworth mode and spacing. Farnsworth spacing adds more
time between characters to slow down the overall sending speed. The advantage of this is
that, by hearing the characters sent at a faster speed, you learn to recognize each character by
its distinctive rhythm, rather than by trying to "count dits." This greatly assists you in
copying Morse code at higher speeds. The Farnsworth speed, however, must be higher than
the overall speed. Setting ## to 00 or less than or equal to the overall speed will disable
Farnsworth mode.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the speed, or enter two
digits 10 to 99 to set the Farnsworth speed or 00 to turn off Farnsworth mode. Press ENTER
to accept and exit, or press ESC to cancel and exit
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MFJ-495 Memory Keyer
Instruction Manual
Note: It is recommended the Farnsworth mode be disabled when sending with the paddle.
When Farnsworth mode is enabled, the paddle will send code at the Farnsworth
speed, not the overall speed.
G#
Gap (word space) – increases the word space with # standard intra-character spaces, where #
is a single digit from 0 to 9. This allows the normally seven-unit long word space up to 16
units long. Note the word space is always at least four units longer than the inter-character
space.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the word spacing, or
enter one digit 0 to 9 to set the word spacing. Press ENTER to accept and exit, or press ESC
to cancel and exit.
H
Hand key – enters the hand key mode to use the SPACE key as a hand (straight) key. The
keyer responds with "HK" (di-di-di-dit dah-di-dah). Dots and dashes are made manually by
using the space bar on your keyboard. That is, keying follows closure of the dot or dash
paddle or the SPACE key, allowing hand-sent code. Normal keyer operation is regained by
squeezing both paddles or by pressing the ESC key.
I#
Iambic – enables iambic A or B mode where # represents A or B, or disables iambic
operation with # = N. The keyer will respond with "A" (di-dah), "B" (dah-di-di-dit), or
"OFF" (dah-dah-dah di-di-dah-dit di-di-dah-dit). Press ESC to cancel and exit.
J####
PTT hang time – sets the PTT (push-to-talk) hang time to #### millisecond, where ####
represents four digits in the range of 0001 to 9999. This controls the time between when CW
keying is ended and when the PTT will de-assert. You may adjust this to your liking for onthe-air sending.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the hang time, or enter
up to four digits 0001 to 9999 to set the hang time. Press ENTER to accept and exit, or press
ESC to cancel and exit.
K##
Keying compensation – sets the keying compensation to ## millisecond, where ## represents
two digits in the range of 00 to 25. Some radios have a key delay of 5 ms or more. By
entering K05, the keyer will add 5 ms to the dots and dashes and subtract 5 ms from the intracharacter spaces. Although similar to increasing weight, this adjustment is independent of the
speed. This setting is used primarily to correct keying distortion by certain transceivers and
to eliminate the problems with a transmitter key delay.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the compensation, or
enter up to two digits 00 to 25 to set the compensation time. Press ENTER to accept and exit,
or press ESC to cancel and exit.
L##
Lag (keying delay) – sets the keying delay to ## millisecond, where ## represents two digits
in the range of 00 to 20. This setting is used primarily to accommodate switching delay in
certain station setup. It is used in conjunction with the PTT line to delay the keying output
until all the switching is finished; that is, the keying output is lagged behind the sidetone
audio and the PTT output. This controls the time between when PTT is asserted and when
CW keying will start.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the delay, or enter up to
two digits 00 to 20 to set the delay time. Press ENTER to accept and exit, or press ESC to
cancel and exit.
M#
24
Monitor – enables (#=Y) or disables (#=N) the sidetone monitor, or toggles the sidetone
monitor on or off without the #. If the sidetone is turned off, it will still play command
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
messages and status information. To conserve power, the keyer should be operated with the
monitor off in favor of the rig’s sidetone.
To change Monitor mode type “~M” followed by “Y’ for on, “N” for off, or ENTER to
toggle. The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel
and exit. Also, press ALT+F5 to toggle monitor on/off.
N####
Number – sets the serial number. The serial number can be set from 0000 to 9999 (0000 will
be converted to 0001). Enter up to four digits to set the current serial number and press
ENTER to accept and exit, or press ESC to cancel and exit.
O#
Output – enables (#=Y) or disables (#=N) the keying output, or toggles the keying output on
or off without the #. If the output is turned off, no signal goes to the Keying Output or the
PTT Output to allow practice operation. The output is temporarily disabled during memory
message storing, command mode operation, status information, and keyer setup.
To change Output mode type “~O” followed by “Y’ for on, “N” for off, or ENTER to toggle.
The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel and exit.
Alternately, press ALT+F6 to toggle output on/off.
P#
Paddle – selects paddle mode of automatic (#=A), semi-automatic (bug, #=S) or hand-key
(#=H) mode. With the automatic option, the keyer functions as an iambic keyer for use with
a dual-lever paddle. As an iambic keyer, the MFJ-495 has dot and dash memories for
"squeeze keying" and functions just like other iambic keyers, both standalone keyers and
those built into radios. With semi-auto, the keyer can be used with a single-lever key, with
dots generated automatically and dashes formed manually by the user. This emulates the
function of a mechanical semi-automatic "bug." You also may use this unit with a straight
key or a bug, connect the straight key or bug to the ground and the dash line. With the handkey option, both the dot and dash lines can be used to connect to a straight key. Notice handkey mode may not be used to enter messages or commands.
Note: In hand-key mode using the paddle, the MFJ-495 will not display the code sent or
record to the keyer memory. Also, the difference between this and the Hand-key
command is that this command affects the paddle only.
Q#
Queue – enables (#=Y) or disables (#=N) the message queue, or toggles the message queue
on or off without the #. Queue mode enables the user to load messages into a buffer to play
sequentially. In queue mode, if you press a message button while a message is playing, that
message will play after the current message is done. When queue mode is off, pressing a
message button will abort any message being played and play the new message. When on, up
to 16 button presses are stored in order and acted upon in succession as each message is
completed.
To change Queue mode type “~Q” followed by “Y” for on, “N” for off, or ENTER to toggle.
The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel and exit.
Alternately, press ALT+F7 to toggle queue on/off.
Note: Disabling the queue mode increases the message stack size to 24 levels deep used
by the embedded Call command.
R##
Ratio – sets the speed ratio of the Speed control, where ## represents two digits in the range
of 02 to 20. The speed at the full clockwise position of the control is ## times that of the
speed at the full counter-clockwise position.
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MFJ-495 Memory Keyer
Instruction Manual
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the ratio, or enter up to
two digits 02 to 20 to set the speed ratio. Press ENTER to accept and exit, or press ESC to
cancel and exit.
S##
Speed – sets the overall code speed to ## WPM, where ## represents two digits in the range
of 05 to 99. By "overall" speed, we mean the speed at which the words or groups are sent. A
"word" is defined as 50 units of time, and the word "PARIS" is exactly 50 units in length.
Therefore, if "PARIS" is sent 13 times in one minute, the sending speed is 13 wpm.
Standard Morse code timing defines a dit as one unit of time and a dah as three units of time.
Within each character, there is one unit between elements (dits and dahs). Three units
separate characters and seven units separate words. Farnsworth spacing (see above) will
increase the amount of time between characters and words. Note that setting the overall
speed greater than or equal to the Farnsworth speed will disable Farnsworth spacing.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the code speed, or enter
up to two digits 05 to 99 to set the code speed. Press ENTER to accept and exit, or press ESC
to accept and exit.
T##
Tone – sets the sidetone frequency to approximately ##0 Hz, where ## represents two digits
in the range of 30 to 99. The MFJ-495 features smooth, clean audio, with sine wave output,
instead of the harsh square wave audio used by many other keyers. Also, the MFJ-495
produces each dit and dah with a rise and decay time of approximately five milliseconds,
avoiding the "spikes" that cause distracting key clicks. The MFJ-495's audio sounds like that
of a good CW transceiver.
Notice an alternating series of dots and dashes are sent to the sidetone monitor to assist in the
setting of the desired sidetone frequency. Press LEFT or DOWN to decrease or press RIGHT
or UP to increase the tone frequency, or enter two digits 30 to 99 to set the tone frequency.
Press ENTER to accept and exit, or press ESC to cancel and exit.
U#
User – selects the current user, where # represents the digit 1 to 4. User mode is provided to
support four operators with different configuration settings, such as speed, weight, etc. This
allows up to four operators to use the keyer without having to reconfigure all the settings for
each operator. It also supports four different configuration settings for different contest
exchanges.
Alternately, press ALT+F1 to select user 1, ALT+F2 for user 2, ALT+F3 for user 3, or
ALT+F4 for user 4.
V
reVerse – reverses the sense of the dot and dash paddles. When using paddles, the MFJ-495
normally expects the dot paddle to be connected to the tip of the plug and the dash paddle to
be connected to the plug's ring. If your paddles are wired in the opposite manner, or you wish
to change between right and left-handed operators, you may reverse the paddles.
W####
Weight – sets the automatic code weighting between ## percent at the counter-clockwise
position and ## percent at the clockwise position of the Speed control, where each ##
represents two digits in the range of 25 to 75. Weighting varies linearly with the overall
speed (automatic weight). Set both ## to the same value for constant weight, where
weighting is independent of the overall speed.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher
weight produces a heavier sound and a lower weight causes characters to sound lighter.
Weight can be set to remain constant and independent of speed, or it can be set to vary with
the code speed.
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 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
An alternating dot/dash is produced to aid in changing the weight. Press LEFT or DOWN to
decrease or press RIGHT or UP to increase constant weight, or enter two pairs of two digits
25 to 75 to set automatic linear weight. Press ENTER to accept and exit, or press ESC to
cancel and exit.
Tip:
Type “W##” and then press TAB or ENTER to change only the counter-clockwise
position weight. Type W, press TAB, and then type ## to change only the
clockwise position weight
X
Xmit (carrier tune) – gives continuous key-down for adjusting transmitter or antenna tuner.
Press any key to exit and release the key line. Alternately, press ALT+F8 to activate carrier
tune mode.
Y
Pulse tune – gives continuous adjustable pulses for adjusting transmitter or antenna tuner.
Press F1 and F2 buttons to change the speed in the range of 50 to 99 WPM. Press F3 and F4
buttons to change the weight (duty cycle) in the range of 1% to 35%. Press ESC to exit and
release the key line.
Alternately, use CTRL+Arrow keys to change the pulse speed and ALT+Arrow keys to
change the pulse weight.
Z###
Zeros and nines – sets the way zeros and nines in the serial number are sent. The first # sets
whether to send the leading zeros as "0", "O", "T" or not at all (# = "N"). The second # sets
whether the other zeros are sent as "0", "O" or "T". The last # sets whether the nines are sent
as "9" or "N". For example, "ZO09" will send the leading zeros as "O" (dah-dah-dah), the
other zeros as "0" (dah-dah-dah-dah-dah), and the nines as "9" (dah-dah-dah-dah-dit).
##
Play message – play message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D. Alternately, press F1 to F8 to play messages in the
current memory bank. Press F9 to F12 to select the current memory bank.
>##
Save message – save message into the keyer memory ##, where the first # is the message
number 1 to 8 and the second # is the memory bank A to D. Alternately, press CTRL+F1 to
CTRL+F8 to save messages in the current memory bank. Press F9 to F12 to select the
current memory bank.
<##
View message – view message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D.
Message Memory
With the keyboard, you can play or save messages using the keyboard function keys. Press function keys
F9 to F12 to quickly select the correct memory bank A to D, respectively. To play a message, press any
keyboard function key F1 to F8. The message will play and send to your radio. Press CTRL+Arrow keys
to change the overall speed on the fly, press ALT+Arrow keys to change the weight on the fly, and press
SHIFT+Arrow keys to change the tone on the fly.
To save a message to memory, press and hold the CTRL key, press the keyboard function key F1 to F8,
and then release the CTRL key (this is denoted as CTRL+Fn). The keyer will respond with "GO" (dahdah-dit dah-dah-dah). Now a message can be typed into memory.
Begin typing in your message. The keyer echoes each character as it is typed. Press the BACK SPACE
key to delete the last character. In message program mode only, press CTRL+BACK SPACE to delete
the last word.
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MFJ-495 Memory Keyer
Instruction Manual
At the end of your message, press ENTER to end your message. The keyer will respond by sending an
end-of-message character (di-dah-di-dah-dit) and save your message. It will automatically insert “]” to
the end of your message.
If you accidentally enter “[“ during the message, you will have to use “]” to end your message – this
allows carriage returns (produced by ENTER) in the message. The open square bracket “[” tells the keyer
to replace the ENTER key with the close square bracket “]” as the end-of-message key.
Refer to “The Memory” section on page 36 for explanation of the MFJ-495’s message memory and how
to use the embedded commands to enhance your message.
Quick Speeds
Each of the four Users has four pre-set memories to store the overall speed, so the speed can be quickly
changed during an exchange. This works similar to your car radio’s pre-set station memories. To store
the current overall speed into one of these pre-set memories, press CTRL+F9 to CTRL+F12. To recall a
pre-set speed to use as the current speed, press ALT+F9 to ALT+F12.
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Instruction Manual
The Terminal
Using the MFJ-495 with a Terminal Program
The Keyer Terminal mode allows a computer to talk to your MFJ-495. All code sent from the paddle and
keyboard is echoed to the Keyer Terminal. All commands are accessible through the Keyer Terminal.
Your computer will need a terminal program to talk to the keyer. The program should be capable of
uploading and downloading ASCII text files. Any good commercial or freeware terminal program should
be satisfactory for use with this keyer.
After you have connected the MFJ-495 to the serial port of your computer with the correct cable, turn on
your computer and load your terminal program. Set the baud rate to 1200, data bits to 8, parity to none,
and stop bits to 1. Also, set the flow control to Xon/Xoff. Now turn on your MFJ-495. You should type
something on the computer. Whatever you type should appear on the LCD display, which shows that
everything is working properly between the computer and keyer. If you do not, recheck your terminal
program and serial port cable connection.
You are ready to send with the keyer. To make a special prosign with the keyer terminal, begin the
prosign with "<" and end the prosign with ">". For example, to make the prosign SN types <SN>. This
will remove the inter-character spaces between the characters making it a prosign. Any prosign can be
made this way, even special local prosigns. Another method is to enclose the prosign with backslashes
such as \SN\.
Note: The open angle bracket “<” enables prosign mode and the close angle bracket “>” disables
prosign mode; while the backslash “\” toggles the prosign mode on and off. A word space also
disables prosign mode.
Tip:
All keystrokes and commands from the Keyer Terminal can also be used via the Keyboard.
Setup Commands
Press the tilde “~” key to enter command mode and the keyer responds with “CO” (dah-di-dah-dit dahdah-dah). Enter a setup command. If the command is invalid then the keyer will send an error character
(di-di-di-di-di-di-di-dit) and return the keyer to normal mode. If the user wishes to re-attempt modifying
features using command mode, he must re-enter command mode by pressing “~” key again. If you enter
the command mode accidentally, press ESC key at any time to exit. At any time, press ENTER to accept
or ESC to cancel. Refer to the appendix “Setup Commands” on page 48 for a table of these commands.
B#
Bank – selects the current memory bank, where # is A, B, C or D. Each memory bank has
eight message blocks of 256 characters each, except the last block.
C#
Character space – increases the inter-character space with # standard intra-character spaces,
where # is a single digit from 0 to 9. This allows the normally three-unit long inter-character
space up to 12 units long. Note the inter-character space is always at least four units shorter
than the word space. Therefore, you might have to increase the word spacing before
adjusting the character space.
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Press either the “–” or “+” (or “=”) to decrease or increase character spacing, or enter one
digit 0 to 9 to set the character spacing. Press ENTER to accept and exit, or press ESC to
cancel and exit.
D
Decrement – decrements the serial number by one, effectively canceling the automatic
increment applied when last played from a message. The decrement function accommodates
re-sending the last serial number, as might be needed when a repeat of a contest exchange is
requested, or canceling the exchange with a station that proved to be a “dupe”. The unit will
echo a "D" (dah-di-dit) for every number that is decrement. Decrement serial number 0001
rolls over to 9999, because the number 0000 is not used.
E##
Edit – allows the operator to append onto or edit an existing message memory, where the first
# is the message number 1 to 8 and the second # is the bank A to D. The keyer will display
your message to the last word. You can then enter more text or erase existing words, just like
the procedure when loading a message.
F##
Farnsworth – uses to enable Farnsworth mode and spacing. Farnsworth spacing adds more
time between characters to slow down the overall sending speed. The advantage of this is
that, by hearing the characters sent at a faster speed, you learn to recognize each character by
its distinctive rhythm, rather than by trying to "count dits." This greatly assists you in
copying Morse code at higher speeds. The Farnsworth speed, however, must be higher than
the overall speed. Setting ## to 00 or less than or equal to the overall speed will disable
Farnsworth mode.
Press either the “–” or “+” (or “=”) to decrease or increase speed, or enter two digits 10 to 99
to set the Farnsworth speed or 00 to turn off Farnsworth mode. Press ENTER to accept and
exit, or press ESC to cancel and exit
Note: It is recommended the Farnsworth mode be disabled when sending with the paddle.
When Farnsworth mode is enabled, the paddle will send code at the Farnsworth
speed, not the overall speed.
G#
Gap (word space) – increases the word space with # standard intra-character spaces, where #
is a single digit from 0 to 9. This allows the normally seven-unit long word space up to 16
units long. Note the word space is always at least four units longer than the inter-character
space.
Press either the “–” or “+” (or “=”) to decrease or increase word spacing, or enter one digit 0
to 9 to set the word spacing. Press ENTER to accept and exit, or press ESC to cancel and
exit.
H
Hand key – enters the hand key mode to use the SPACE key as a hand (straight) key. The
keyer responds with "HK" (di-di-di-dit dah-di-dah). Dots and dashes are made manually by
using the space bar on your keyboard. That is, keying follows closure of the dot or dash
paddle or the SPACE key, allowing hand-sent code. Normal keyer operation is regained by
squeezing both paddles or by pressing the ESC key.
Tip:
The space bar on the keyer terminal does not work properly in hand-key mode,
because of the typematic delay of the computer keyboard.
I#
Iambic – enables iambic A or B mode where # represents A or B, or disables iambic
operation with # = N. The keyer will respond with "A" (di-dah), "B" (dah-di-di-dit), or
"OFF" (dah-dah-dah di-di-dah-dit di-di-dah-dit). Press ESC to cancel and exit.
J####
PTT hang time – sets the PTT (push-to-talk) hang time to #### millisecond, where ####
represents four digits in the range of 0001 to 9999. This controls the time between when CW
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keying is ended and when the PTT will de-assert. You may adjust this to your liking for onthe-air sending.
Press either the “–” or “+” (or “=”) to decrease or increase the hang time, or enter up to four
digits 0001 to 9999 to set the hang time. Press ENTER to accept and exit, or press ESC to
cancel and exit.
K##
Keying compensation – sets the keying compensation to ## millisecond, where ## represents
two digits in the range of 00 to 25. Some radios have a key delay of 5 ms or more. By
entering K05, the keyer will add 5 ms to the dots and dashes and subtract 5 ms from the intracharacter spaces. Although similar to increasing weight, this adjustment is independent of the
speed. This setting is used primarily to correct keying distortion by certain transceivers and
to eliminate the problems with a transmitter key delay.
Press either the “–” or “+” (or “=”) to decrease or increase compensation, or enter up to two
digits 00 to 25 to set the compensation time. Press ENTER to accept and exit, or press ESC
to cancel and exit.
L##
Lag (keying delay) – sets the keying delay to ## millisecond, where ## represents two digits
in the range of 00 to 20. This setting is used primarily to accommodate switching delay in
certain station setup. It is used in conjunction with the PTT line to delay the keying output
until all the switching is finished; that is, the keying output is lagged behind the sidetone
audio and the PTT output. This controls the time between when PTT is asserted and when
CW keying will start.
Press either the “–” or “+” (or “=”) to decrease or increase delay, or enter up to two digits 00
to 20 to set the delay time. Press ENTER to accept and exit, or press ESC to cancel and exit.
M#
Monitor – enables (#=Y) or disables (#=N) the sidetone monitor, or toggles the sidetone
monitor on or off without the #. If the sidetone is turned off, it will still play command
messages and status information. To conserve power, the keyer should be operated with the
monitor off in favor of the rig’s sidetone.
To change Monitor mode type “~M” followed by “Y’ for on, “N” for off, or ENTER to
toggle. The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel
and exit.
N####
Number – sets the serial number. The serial number can be set from 0000 to 9999 (0000 will
be converted to 0001). Enter up to four digits to set the current serial number and press
ENTER to accept and exit, or press ESC to cancel and exit.
O#
Output – enables (#=Y) or disables (#=N) the keying output, or toggles the keying output on
or off without the #. If the output is turned off, no signal goes to the Keying Output or the
PTT Output to allow practice operation. The output is temporarily disabled during memory
message storing, command mode operation, status information, and keyer setup.
To change Output mode type “~O” followed by “Y’ for on, “N” for off, or ENTER to toggle.
The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel and exit.
P#
Paddle – selects paddle mode of automatic (#=A), semi-automatic (bug, #=S) or hand-key
(#=H) mode. With the automatic option, the keyer functions as an iambic keyer for use with
a dual-lever paddle. As an iambic keyer, the MFJ-495 has dot and dash memories for
"squeeze keying" and functions just like other iambic keyers, both standalone keyers and
those built into radios. With semi-auto, the keyer can be used with a single-lever key, with
dots generated automatically and dashes formed manually by the user. This emulates the
function of a mechanical semi-automatic "bug." You also may use this unit with a straight
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key or a bug, connect the straight key or bug to the ground and the dash line. With the handkey option, both the dot and dash lines can be used to connect to a straight key. Notice handkey mode may not be used to enter messages or commands.
Note: In hand-key mode using the paddle, the MFJ-495 will not display the code sent or
record to the keyer memory. Also, the difference between this and the Hand-key
command is that this command affects the paddle only.
Q#
Queue – enables (#=Y) or disables (#=N) the message queue, or toggles the message queue
on or off without the #. Queue mode enables the user to load messages into a buffer to play
sequentially. In queue mode, if you press a message button while a message is playing, that
message will play after the current message is done. When queue mode is off, pressing a
message button will abort any message being played and play the new message. When on, up
to 16 button presses are stored in order and acted upon in succession as each message is
completed.
To change Queue mode type “~Q” followed by “Y” for on, “N” for off, or ENTER to toggle.
The keyer will respond with “ON” or “OFF”. Press ESC or any other key to cancel and exit.
Note: Disabling the queue mode increases the message stack size to 24 levels deep used
by the embedded Call command.
R##
Ratio – sets the speed ratio of the Speed control, where ## represents two digits in the range
of 02 to 20. The speed at the full clockwise position of the control is ## times that of the
speed at the full counter-clockwise position.
Press either the “–” or “+” (or “=”) to decrease or increase ratio, or enter up to two digits 02
to 20 to set the speed ratio. Press ENTER to accept and exit, or press ESC to cancel and exit.
S##
Speed – sets the overall code speed to ## WPM, where ## represents two digits in the range
of 05 to 99. By "overall" speed, we mean the speed at which the words or groups are sent. A
"word" is defined as 50 units of time, and the word "PARIS" is exactly 50 units in length.
Therefore, if "PARIS" is sent 13 times in one minute, the sending speed is 13 wpm.
Standard Morse code timing defines a dit as one unit of time and a dah as three units of time.
Within each character, there is one unit between elements (dits and dahs). Three units
separate characters and seven units separate words. Farnsworth spacing (see above) will
increase the amount of time between characters and words. Note that setting the overall
speed greater than or equal to the Farnsworth speed will disable Farnsworth spacing.
Press either the “–” or “+” (or “=”) to decrease or increase speed, or enter up to two digits 05
to 99 to set the code speed. Press ENTER to accept and exit, or press ESC to accept and exit.
T##
Tone – sets the sidetone frequency to approximately ##0 Hz, where ## represents two digits
in the range of 30 to 99. The MFJ-495 features smooth, clean audio, with sine wave output,
instead of the harsh square wave audio used by many other keyers. Also, the MFJ-495
produces each dit and dah with a rise and decay time of approximately 5 milliseconds,
avoiding the "spikes" that cause distracting key clicks. The MFJ-495's audio sounds like that
of a good CW transceiver.
Notice an alternating series of dots and dashes are sent to the sidetone monitor to assist in the
setting of the desired sidetone frequency. Press either the “–” or “+” (or “=”) to decrease or
increase tone frequency, or enter two digits 30 to 99 to set the tone frequency. Press ENTER
to accept and exit, or press ESC to cancel and exit.
U#
32
User – selects the current user, where # represents the digit 1 to 4. User mode is provided to
support four operators with different configuration settings, such as speed, weight, etc. This
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Instruction Manual
allows up to four operators to use the keyer without having to reconfigure all the settings for
each operator. It also supports four different configuration settings for different contest
exchanges.
V
reVerse – reverses the sense of the dot and dash paddles. When using paddles, the MFJ-495
normally expects the dot paddle to be connected to the tip of the plug and the dash paddle to
be connected to the plug's ring. If your paddles are wired in the opposite manner, or you wish
to change between right and left-handed operators, you may reverse the paddles.
W####
Weight – sets the automatic code weighting between ## percent at the counter-clockwise
position and ## percent at the clockwise position of the Speed control, where each ##
represents two digits in the range of 25 to 75. Weighting varies linearly with the overall
speed (automatic weight). Set both ## to the same value for constant weight, where
weighting is independent of the overall speed.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher
weight produces a heavier sound and a lower weight causes characters to sound lighter.
Weight can be set to remain constant and independent of speed, or it can be set to vary with
the code speed.
An alternating dot/dash is produced to aid in changing the weight. Press either the “–” or “+”
(or “=”) key to change constant weight, or enter two pairs of two digits 25 to 75 to set
automatic linear weight. Press ENTER to accept and exit, or press ESC to cancel and exit.
Tip:
Type “W##” and then press TAB or ENTER to change only the counter-clockwise
position weight. Type W, press TAB, and then type ## to change only the
clockwise position weight.
X
Xmit (carrier tune) – gives continuous key-down for adjusting transmitter or antenna tuner.
Press any key to exit and release the key line.
Y
Pulse tune – gives continuous adjustable pulses for adjusting transmitter or antenna tuner.
Press F1 and F2 buttons to change the speed in the range of 50 to 99 WPM. Press F3 and F4
buttons to change the weight (duty cycle) in the range of 1% to 35%. Press ESC to exit and
release the key line.
Z###
Zeros and nines – sets the way zeros and nines in the serial number are sent. The first # sets
whether to send the leading zeros as "0", "O", "T" or not at all (# = "N"). The second # sets
whether the other zeros are sent as "0", "O" or "T". The last # sets whether the nines are sent
as "9" or "N". For example, "ZO09" will send the leading zeros as "O" (dah-dah-dah), the
other zeros as "0" (dah-dah-dah-dah-dah), and the nines as "9" (dah-dah-dah-dah-dit).
##
Play message – play message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D.
>##
Save message – save message into the keyer memory ##, where the first # is the message
number 1 to 8 and the second # is the memory bank A to D.
<##
View message – view message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D.
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Message Memory
To play a message in the terminal mode, type ~## where the first # is message number 1 to 8 and the
second # is memory bank A to D. The message is sent to the radio and echoed back to the terminal.
There are three different ways to save a message in the keyer terminal. You can type a message manually
or load the message that you have saved in a text file. To save a message, type ~>## or ~>>## where ##
is the message number and bank followed by the content of the message. Begin typing in your message.
Press the BACK SPACE key to delete the last character. At the end of your message, press ENTER key
to end and save your message. It will automatically insert “]” to the end of your message.
Alternately, type ~>##[message text]. The keyer will end the message when the close square bracket “]”
is received. When the open square bracket “[” is received, the keyer will use the close square bracket “]”
(instead of the ENTER key) as the end-of-message indicator from that point on. This allows carriage
returns, produced by the ENTER key, in the message.
To view the content of a message, type ~<## where ## is the message number and bank. The memory
will echo to the terminal.
Message Commands
To
Play Message ##
Save Message ##
View Message ##
Types
~##
~>##[message]
~>##message ENTER
~>>##message ENTER
~<##
For
Fast loading of message (no echo).
Fast loading of message (no echo).
Manually typed message (with echo).
Refer to “The Memory” section on page 36 for explanation of the MFJ-495’s message memory and how
to use the embedded commands to enhance your message.
Uploading and Downloading Messages:
To send messages either from your computer to the MFJ-495 or from the unit to your computer, you use a
terminal program on the computer that is capable of transferring ASCII data. Configure the terminal
software for 1200 baud, 8 data bits, no parity and one stop bit. To perform the transfer, you prepare either
the computer or the Keyer to receive the file, and then send from the other.
Loading a Memory Block from the Computer
•
•
•
34
Type “~>##”, where the first # is a digit in the range of 1 to 8 for the message number and the second
# is a letter in the range of A to D for the memory bank. The word RECEIVING will appear. The
unit now is ready to receive data from your computer.
Begin sending the data from the computer, and a progress indicator will appear on line two of the
display. Invalid data will be ignored during the loading process. To stop loading data at any time,
press the Menu button.
The MFJ-495 automatically inserts an open square bracket “[” at the beginning of every message.
This is its "beginning-of-message" indicator. When you press Menu or ENTER to end a transfer, the
unit inserts a close square bracket “]” as its "end-of-message" indicator. If you insert “[]” at the end
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•
Instruction Manual
of your message file, the MFJ-495 will stop the transfer automatically when the close square bracket
“]” is received. If the unit runs out of memory, the transfer will be stopped automatically.
When the message transfer is completed, the unit will display RECEIVED XXXX where XXXX is a
four-digit number indicating the number of characters received. This number includes the opening
and ending message delimiters “[” and “]”, plus any tabs and carriage returns.
Normal operation is automatically resumed after approximately two seconds. Or, type “]” or press
any button or paddle to return to normal operation immediately.
WARNING:
Do not turn the power off while loading the memory; otherwise, the memory can
be corrupted.
One way of speeding data transfer is to configure your terminal program to strip out linefeeds that follow
carriage returns. While computers store a carriage return as two characters (the carriage return followed
by a linefeed), the MFJ-495 stores only the carriage return and generates the linefeed following it during
playback. The additional linefeed thus does not need to be transferred to the Keyer.
Loading a Memory Block Manually
•
•
•
Type “~>>##” (with two “>” characters) where the first # is a digit in the range of 1 to 8 for the
message number and the second # is a letter in the range of A to D for the memory bank. The keyer
will display “[” and respond with “GO” (dah-dah-dit dah-dah-dah).
Begin typing in your message. The keyer echoes each character as it is typed. Press the BACK
SPACE key to delete the last character.
At the end of your message, press ENTER to end your message. The keyer will respond by sending
an end-of-message character (di-dah-di-dah-dit) and save your message. It will automatically insert
“]” to the end of your message.
Sending Contents of a Memory Block to the Computer
•
•
•
•
•
Configure your terminal program to receive ASCII data.
Type “~<##”, where the first # is a digit in the range of 1 to 8 for the message number and the second
# is a letter in the range of A to D for the memory bank. SENDING XXXX will appear on the
display, where XXXX is a four-digit number indicating the number of characters in the message plus
the message delimiters “[” and “]”.
A progress indicator will appear on the second line of the display to indicate the percentage of the
message that has been sent.
To stop the transfer at any time, press Menu or ESC.
Return to normal operation when the transfer is completed.
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The Memory
Message Memory
You may compose messages on a computer and load them into the MFJ-495's memory. The unit's
memory system is quite flexible and allows up to 32 messages to be saved. One message can call another
for additional flexibility. Using the memories, you may prepare the text for a classroom or over-the-air
code practice session in advance. Also, a complete set of QSO exchange can be prepared and loaded into
the MFJ-495. The memory is non-volatile, so it is saved even when the power is turned off and it does
not require battery backup to preserve the recorded messages.
The unit's 8K memory is organized with four banks of eight blocks of 256-bytes each, except the last
block. This composes of 32 individual memory blocks arranged in a stack structure, illustrated in the
diagram shown in Figure 9. The memory banks are labeled A through D. The total memory available is
7.875K (8064) characters, where 1K = 1024. Each memory block is nominally ¼K (256) characters,
except the last block 8D that has a capacity of 128 characters. However, an individual message may fill
more than one memory block. When this happens, blocks are filled sequentially, moving upward in the
diagram. If a message begins in block 1B or higher memory blocks, ¼K is reserved for each of the
previous memory blocks.
For example, a message begun in block 3A
will, if longer than ¼K characters, flow into
block 4A, then block 5A, and so on. However,
it cannot flow downward into block 2A or
block 1A. Because each of these lower
memory blocks has ¼K reserved, the message
starting in block 3A can be a maximum of
7.375K (7552) characters.
The first character displayed on each message
menu indicates the status of that memory block.
If this character is an open square bracket “[”
(the “beginning-of-message” indicator), the
displayed block is the beginning of the
message; otherwise, it is a portion of the
previous memory block. Similarly, if the last
character is a close square bracket “]” (the
“end-of-message” indicator), the displayed
block is the end of the message. Message
playback will always start at the beginning of a
message no matter which memory block of the
message you have selected in the message
menu.
Figure 9. MFJ-495 Message Memory Structure.
For example, if the display shows [1A 2A 3A][4A], there is one continuous message occupying
blocks 1A, 2A and 3A and another message in block 4A. In this case, selecting 1A, 2A or 3A for
playback will always start the message from block 1A. This message begins in block 1A, flows into
block 2A, and ends in block 3A.
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Instruction Manual
Preparing Messages
To prepare messages, use an ASCII text editor on your computer. Valid characters for messages include
all those listed in the chart “Morse Code Character Set” on page 45, the space, tab and carriage return. In
addition, there are special characters, shown in the table below. Any invalid characters in a message will
be ignored when the file is downloaded.
Special Characters
Characters
Square Brackets ( [ ] )
Angle Brackets ( < > )
Back Slashes ( \ \ )
Space+Slash ( / )
Represent
Delimiters for messages in memory.
Delimiters for custom prosigns.
Delimiters for custom prosigns.
Prefix for embedded commands.
Note: The Tab is displayed as a right arrow character and the Carriage Return is displayed as a left
arrow character on the LCD. Both are sent as a word space.
You may control the unit's features during message playback by using embedded commands. These
embedded commands can set sending speed, audio tone, and Farnsworth values, as well as provide great
flexibility by allowing functions such as message looping and one message calling another. Embedded
commands begin with a slash “/” and must enter as a separate word. Upper or lowercase letters may be
used; embedded commands are not case-sensitive.
When a parameter such as Overall Speed or Tone is specified by an embedded command, the parameter
will remain set during playback of that message. When playback of that message is completed or
stopped, the value of the parameter will revert to the value set prior to the message playback.
Note: Adjusting the Speed control during message playback will undo the settings set by embedded
commands /S, /U, /V and /W.
Embedded Commands
While in the message recording mode you may use embedded commands for special features. To use an
embedded command, simply store the multi-character embedded command code within your message.
To distinguish embedded commands from normal text, the embedded commands must be entered as a
separate word; that is, it must be preceded by a word space (this leading space is ignored during
playback). When encountered during message playback, the commands are executed. Note that if “/” is
part of a single word, as in K5MFJ/4, it is sent as expected and is not executed as an embedded command.
To use an embedded command at the beginning of a message, the space preceding the “/” is optional; that
is, “/” (without being preceded by a word space) at the beginning of a message is executed as an
embedded command. Embedded commands that are not at the beginning of a message must be prefixed
by “space + slash”. Embedded commands and their uses are explained below:
//
Slash – sends a slash character (dah-di-di-dah-dit) at the beginning of a message or
immediately after a word space.
/##
Call – calls message ##, where the first # is a single digit in the range of 1 to 8 for the
message number and the second # is a letter in the range of A to D for the memory bank.
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This allows one message to be called from another. When playback of the called message is
finished, playback continues with the rest of the calling message. This command has a 16level deep stack; that is, a message can call another message, this message then calls another
message which in turn calls another message and so on up to 16 times. One message should
not call itself or any of its calling messages; otherwise, the stack will overflow resulting in
infinite loop.
Note: The message stack size increases to 24 levels deep if the message queue is
disabled.
/D
Decrement – decrements the serial number. Serial number 0001 will decrement to 9999,
skipping 0000 since it is not used. This feature allows a serial number to be sent twice in a
message. For example: UR RST 559 559 SN /N /D SN /N.
/F##
Farnsworth – sets the current Farnsworth speed to ## WPM, where ## represents two digits
in the range of 10 to 99. Setting ## to 00 disables the Farnsworth mode (two zeros must be
used here).
/FU#
/F+#
Farnsworth Up – increases the Farnsworth speed by # WPM, where # is a single digit in the
range of 0 to 9. Increasing (wraparound) to 00 or less than or equal to the overall speed will
disable the Farnsworth mode.
/FD#
/F–#
Farnsworth Down – decreases the Farnsworth speed by # WPM, where # is a single digit in
the range of 0 to 9. Decreasing to 00 or less than or equal to the overall speed will disable
the Farnsworth mode.
/G#
Gap – inserts a gap of # standard intra-character spaces into the message, where # is a digit in
the range of 1 to 9 (0 can be used but not practical). Invalid numeral code will automatically
default to zero. This command is used to exaggerate inter-character and word spacing.
/J##
Jump – jumps to the message ##, where the first # is a single digit in the range of 1 to 8 for
the message number and the second # is a letter in the range of A to D for the memory bank.
This allows you to continue your message into another message. This command can be used
to create loop of multiple messages. Note that any character after “/J##” will not be sent.
/L##
Loop – creates a loop of the current message block ## times, where ## represents two digits
in the range of 01 to 99, and then continues with the rest of the message. When loop under
10 times, leading zero must be used. Set ## to 00 to create an infinite loop. Only up to two
levels of loops are supported—the inner loop is finite and the outer loop is infinite, even if
“/L00” is not used. Note that any character after “/L00” will not be sent. For example: CQ
/L03DE K5MFJ /L00.
/N
Number – inserts a contest serial number, in the range of 001 to 9999, into the message.
Setup command Z controls the way zeroes and nines in the serial number are sent. Only
three digits are sent for numbers less than 1000--use leading zeros when appropriate. The
serial number is automatically post-incremented each time it is sent. The serial number
increments from 0001 to 9999 and rolls over to 0001, skipping 0000 since it is not used. The
serial number is set to the same one as before when power on. If a different serial number is
desired, it must be re-programmed. The serial number can be set from 0000 to 9999 (0000
will automatically convert to 0001). For example: YOU ARE CONTACT NR /N.
/P##
Pause – inserts a timed pause of ## seconds into the message, where ## represents two digits
in the range of 00 to 99. When setting pauses under 10 seconds, leading zero must be used.
Pauses greater than 99 seconds are obtained by using consecutive commands that total the
desired value. For example: TIMEOUT 1 SEC /P01 TIMEOUT 1 MIN /P60 TIMEOUT
1 MIN 39 SEC /P99 TIMEOUT 2 MIN /P60 /P60.
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/R
Repeat – repeats playback from the beginning, even with calling messages. Note that any
character after “/R” will not be sent.
/S##
Speed – sets the current overall speed to ## WPM, where ## represents two digits in the
range of 05 to 99. When setting speeds under 10 WPM, leading zero must be used.
/SU#
/S+#
Speed Up – increases the overall speed by # WPM, where # is a single digit in the range of 0
to 9.
/SD#
/S–#
Speed Down – decreases the overall speed by # WPM, where # is a single digit in the range
of 0 to 9.
/T##
Tone – sets the current sidetone frequency to approximately ##0 Hz, where ## represents two
digits in the range of 30 to 99. Note that this command sets the sidetone to one of the 24
available frequencies.
##
30, 31, 32
33, 34, 35
36, 37, 38
39, 40, 41
42, 43, 44
45, 46, 47
48, 49, 50
51, 52, 53
Tone Freq.
305 Hz
335 Hz
366 Hz
396 Hz
427 Hz
457 Hz
488 Hz
518 Hz
##
54, 55, 56
57, 58, 59
60, 61, 62
63, 64, 65
66, 67, 68
69, 70, 71
72, 73, 74
75, 76, 77
Tone Freq.
549 Hz
579 Hz
610 Hz
640 Hz
671 Hz
701 Hz
732 Hz
762 Hz
##
78, 79, 80
81, 82, 83
84, 85, 86
87, 88, 89
90, 91, 92
93, 94, 95
96, 97, 98
99
Tone Freq.
793 Hz
823 Hz
854 Hz
884 Hz
915 Hz
945 Hz
976 Hz
1006 Hz
/TU#
/T+#
Tone Up – increases the sidetone frequency by # available frequency, where # is a single
digit in the range of 0 to 9.
/TD#
/T–#
Tone Down – decreases the sidetone frequency by # available frequency, where # is a single
digit in the range of 0 to 9.
/U##
Ultra Speed – sets the ultra speed mode for a message at speed of ##0 WPM, where ##
represents two digits in the range of 10 to 99. For example, “10” is 100 WPM and “99” is
990 WPM. This command is used primarily for meteor scatter work. Note that Farnsworth,
Weighting, Character Space, Word Space, Keying Compensation, and Tone settings are
disabled during ultra speed message transmission. Also, messages using both regular speed
and ultra speed can be created. To exit the ultra speed mode, set ## to 00 such as /U00 and
the message will return to regular speed. Alternately, the message can be returned to a lower
regular speed by use of the /F, /S, or /W command.
/V##
Very Slow Speed – sets the QRSS mode for a message at very slow speed with dots of ##
seconds, where ## represents two digits in the range of 01 to 99. For example, “03” produces
three-second dots, nine-second dashes, three-second intra-character spaces, nine-second intercharacter spaces, and 21-second word spaces. QRSS is a very slow CW mode used by
amateurs interested in very weak signal operation on VHF and above frequencies and on HF
beacons. Note that Farnsworth, Weighting, Character Space, Word Space, Keying
Compensation, and Tone settings are disabled during very slow speed message transmission.
Also, messages using both regular speed and very slow speed can be created. To exit QRSS
mode, set ## to 00 such as /V00 and the message will return to regular speed. Alternately, the
message can be returned to a faster regular speed by use of the /F, /S, or /W command.
During QRSS mode, the bottom line of the display reads SPEED = QRSS## where ## is
the selected QRSS speed. Pressing the Menu button restores the main menu. The Speed,
Farnsworth, Weight, and Tone main menus are not available in the QRSS mode.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
/W##
Weight – sets the code weight to ## percent, where ## represents two digits in the range of 25
to 75.
/WU#
/W+#
Weight Up – increases the code weight by # percent, where # is a single digit in the range of
0 to 9.
/WD#
/W–#
Weight Down – decreases the code weight by # percent, where # is a single digit in the range
of 0 to 9.
/X##
Xmit – keys the keyer for ## seconds, where ## represents two digits in the range of 01 to 99.
When setting time under 10 seconds, leading zero must be used. Time greater than 99
seconds is obtained by using consecutive commands that total the desired value. Set ## to 00
to key continuously for tuning the transmitter. For example: KEY 1 SEC /X01 KEY 1
MIN /X60 KEY 1 MIN 39 SEC /X99 KEY 2 MIN /X60 /X60 KEY INFINITE /X00.
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 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Appendices
Resetting the Keyer
Each time the keyer is turned off, the microprocessor powers down and saves all memories and
configurations to non-volatile memory ready to be used the next time the unit is turned on again. If the
keyer in not working properly, even on initial power on, try resetting to the factory defaults.
Factory Defaults
The unit is shipped with the following default settings for all users 1 to 4:
• Main Menu
[1A][2A][3A][4A]
• Setup Menu
Speed Ratio
• Memory Bank
A
• Speed Control Range
13 to 39 WPM
• Speed Ratio
3-to-1
• Overall Speed
13 WPM
• Farnsworth
off
• Weight
50% constant
• Character Space
3 units
• Word Space
7 units
• Keying Compensation
0 msec
• Keying Delay
0 msec
• PTT Hang Time
1000 msec
• Tone Frequency
701 Hz
• Serial Number
0001
• Leading Zeroes
on and send as O (dah-dah-dah)
• Other Zeroes
send as 0 (dah-dah-dah-dah-dah)
• Nines
send as 9 (dah-dah-dah-dah-dit)
• Iambic Mode
A
• Reverse Mode
off (dot to tip, dash to ring)
• Paddle Mode
automatic
• Monitor Mode
on
• Output Mode
on
• Queue Mode
on
• Pulse Tune Speed
75 WPM
• Pulse Tune Weight
13% duty cycle
• Quick Speeds
13, 15, 18 and 20 WPM
To reset the keyer to these defaults:
1. Skip to step 6 if you want to reset the current user; otherwise continue with step 2.
2. Turn on the power to the keyer.
3. Press and hold the Menu button for two seconds to go to the setup menus.
4. Press Previous or Next button to go to the User menu.
5. Press Up or Down button to select the user to be reset to factory defaults.
6. Turn off the power to the keyer.
7. Press and hold both the Menu and F2 buttons while turning the power on.
8. Release the buttons when DEFAULTS RESET appears on the display.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
9. Resume with normal operation.
WARNING:
If the MFJ-495 is behaving weird or acting erratic, try resetting the keyer to
factory defaults.
Message Memory Reset
To erase all message memories, hold down the Menu and F4 buttons while turning the power on. A
confirmation message ERASE ALL MSGS? will display. Press the [YES] button to clear all message
memories, or press the [NO] button to cancel. Release the button to resume normal operation.
Remember that all stored messages will be lost!
To erase a message, select that message for recording. Without typing or keying anything into memory,
end the recording by typing ENTER or holding down any function button for two seconds. The keyer
will respond with an end-of-message character (di-dah-di-dah-dit).
Self Test
A self-test routine will check the functions of the MFJ-495. This routine checks the display, the paddles,
the front-panel buttons, the remote port, the internal memory and the audio circuitry. During the self-test,
you may stop the test by turning off the unit; however, this should NOT be done during the memory test
or the memory could be corrupted. The self-test can be completed in approximately 30 seconds.
Connections of the serial port and keyboard are not necessary for this test.
Note: Performing the self-test will reset the unit to its factory default settings for all four users and
select user 1 as the current user.
Here is the self-test procedure:
1. Turn off the power to the keyer.
2. Connect a paddle to the Key Input jack. Connect a remote control to the Remote port if you have
one.
3. Turn Speed control to full clockwise position. Set volume to a comfortable listening level.
4. Press and hold only the Menu button while turning the power on.
5. The test begins by displaying a copyright message and firmware version number. This is the test of
the display. This message is also sent to the serial port. Release the Menu button before the message
completes.
6. You will be prompted to press the dot and dash paddles. This assumes the dot paddle is connected to
the tip of the plug and the dash paddle to the ring of the plug. The LED should blink once for each
press.
7. You will be prompted to press each of the front-panel buttons. The LED should blink once for each
press.
8. You will be prompted to press the dot and dash connections of the Remote port. If you don’t have a
remote control, you can use the paddle. The LED should blink once for each press.
9. You will be prompted to press the function button connections of the Remote port. If you don’t have
a remote control, you can press the front-panel buttons. The LED should blink once for each press.
10. Test the Speed control by turning it to full counter-clockwise then to full clockwise. The LED should
blink once at each end.
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 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
11. The unit then tests its non-volatile memory. Notice this step will reset the unit to its factory default
settings for all four users, and select user 1 as the current user.
12. If the unit is okay, a repetitive message PASS will be displayed and sent as audio. If there is a
problem, a failure message will be displayed and sent.
13. Once you have confirmed that the audio is okay, turn the unit off.
Failure Message Meanings:
• DASH FAIL
Dash paddle (ring of the plug) is shorted or improperly connected.
Dot paddle (tip of the plug) is shorted or improperly connected.
• DOT FAIL
F1 button is shorted or improperly connected.
• F1 FAIL
F2 button is shorted or improperly connected.
• F2 FAIL
F3 button is shorted or improperly connected.
• F3 FAIL
F4 button is shorted or improperly connected.
• F4 FAIL
Non-volatile memory circuitry is improperly connected.
• MEMORY FAIL
• MENU FAIL
Menu button is shorted or improperly connected.
Power down circuitry is bad.
• PD FAIL
Speed control is bad.
• SPEED FAIL
Power Down Circuit Test
This test checks the power down circuitry. It is recommended that this test should be done immediately
after the regular self test described above.
Note: The keyer must be reset to factory defaults before performing this test.
Here is the test procedure:
1. Make sure power to the keyer is off.
2. If the keyer has been reset to factory defaults, skip to step 7; otherwise continue with step 3.
3. Press and hold both the Menu and F2 buttons while turning the power on.
4. Release both buttons when DEFAULTS RESET appears on the display.
5. Make sure the display shows [1A][2A][3A][4A]; however, depending on your message
memory, some brackets “[” and “]” might not show on your display.
6. Turn the power off.
7. Press and hold only the F2 button while turning the power on.
8. If the power down circuitry is okay, a repetitive message PASS will be displayed and sent as audio.
If there is a problem, message PD FAIL will be displayed and sent as audio repetitively.
9. Turn the power off.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
Troubleshooting
Q. Why can't I enable the Farnsworth mode?
A. The overall speed is at its maximum of 99 WPM.
Q. Why adjusting the Speed control does not seem to change the code speed?
A. The Farnsworth mode is enabled with speed greater than the maximum speed of the Speed control.
Q. When keying with the paddle, the Speed control is not working?
A. Disable the Farnsworth mode.
Q. Why do I get extra linefeeds when uploading to the computer?
A. Configure your terminal program to strip the linefeeds from the carriage returns.
Q. The keyer is acting erratic?
A. Reset the keyer to factory defaults setting by pressing both Menu and F2 buttons while turning the
power on.
Q. How come I cannot increase the character spacing?
A. The word spacing must be at least four units more than the character spacing.
Q. The keyer keys continuously when I turn on the power?
A. Make sure the Manual Key jumper JMP3 is set to the correct logic.
Technical Assistance
If you have any problem with this unit first check the appropriate section of this manual. If the manual
does not reference your problem or your problem is not solved by reading the manual you may call MFJ
Technical Service at 662-323-0549 or the MFJ Factory at 662-323-5869. You will be best helped if you
have your unit, manual and all information on your station handy so you can answer any questions the
technicians may ask.
You can also send questions by mail to MFJ Enterprises, Inc., 300 Industrial Park Road, Starkville, MS
39759; by FAX to 662-323-6551; or by email to techinfo@mfjenterprises.com. Please include a
complete description of the problem, an explanation of exactly how you are using the unit when the
problem arises, and a complete description of any equipment you are using with this unit, such as a
computer (including applicable software) or radio. Also include the firmware version number of your
unit.
44
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Morse Code Character Set1
A
B
C
D
E
F
G
H
I
J
K
L
M
di-dah
dah-di-di-dit
dah-di-dah-dit
dah-di-dit
dit
di-di-dah-dit
dah-dah-dit
di-di-di-dit
di-dit
di-dah-dah-dah
dah-di-dah
di-dah-di-dit
dah-dah
•–
–•••
–•–•
–••
•
••–•
––•
••••
••
•–––
–•–
•–••
––
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
dah-dit
dah-dah-dah
di-dah-dah-dit
dah-dah-di-dah
di-dah-dit
di-di-dit
dah
di-di-dah
di-di-di-dah
di-dah-dah
dah-di-di-dah
dah-di-dah-dah
dah-dah-di-dit
–•
–––
•––•
––•–
•–•
•••
–
••–
•••–
•––
–••–
–•––
––••
1
2
3
4
5
di-dah-dah-dah-dah
di-di-dah-dah-dah
di-di-di-dah-dah
di-di-di-di-dah
di-di-di-di-dit
•––––
••–––
•••––
••••–
•••••
6
7
8
9
0
dah-di-di-di-dit
dah-dah-di-di-dit
dah-dah-dah-di-dit
dah-dah-dah-dah-dit
dah-dah-dah-dah-dah
–••••
––•••
–––••
––––•
–––––
Period
Comma
Question Mark or
Request for Repetition
Fraction Bar
End of Message or Cross
End of Work
Double Dash, Pause or Break
Semicolon
Colon
Apostrophe
Quotation Mark
Hyphen or Dash
Underline
Dollar Sign
Left Parenthesis
Right Parenthesis
Wait
Understood
Starting Signal
Error
At
Paragraph
Invitation to Transmit
1.
[.]
[,]
di-dah-di-dah-di-dah
dah-dah-di-di-dah-dah
•–•–•–
––••––
AAA
MIM
[?]
[/]
[+]
[*]
[=]
[;]
[:]
[']
["]
[-]
[_]
[$]
[(]
[)]
[&]
[!]
[%]
[^]
[@]
[#]
di-di-dah-dah-di-dit
dah-di-di-dah-dit
di-dah-di-dah-dit
di-di-di-dah-di-dah
dah-di-di-di-dah
dah-di-dah-di-dah-dit
dah-dah-dah-di-di-dit
di-dah-dah-dah-dah-dit
di-dah-di-di-dah-dit
dah-di-di-di-di-dah
di-di-dah-dah-di-dah
di-di-di-dah-di-di-dah
dah-di-dah-dah-dit
dah-di-dah-dah-di-dah
di-dah-di-di-dit
di-di-di-dah-dit
dah-di-dah-di-dah
di-di-di-di-di-di-di-dit
di-dah-dah-di-dah-dit
di-dah-di-dah-di-dit
dah-di-dah
••––••
–••–•
•–•–•
•••–•–
–•••–
–•–•–•
–––•••
•––––•
•–••–•
–••••–
••––•–
•••–••–
–•––•
–•––•–
•–•••
•••–•
–•–•–
••••••••
•––•–•
•–•–••
–•–
IMI
FCC test requirement consists the 26 letters, the 10 numerals, the period, the comma, the question mark,
 2001-2012 MFJ Enterprises, Inc.
DN
AR
SK
BT
KR
OS
WG
AF
DU
IQ
SX
KN
KK
AS
SN
KA
HH
AC
AL
K
AR , SK , BT
and
DN .
45
MFJ-495 Memory Keyer
Instruction Manual
Signals Used in Other Radio Services
Interrogatory
Emergency Silence
Executive Follows
Break-in Signal
Emergency Signal
Relay of Distress
di-di-dah-di-dah
di-di-di-di-dah-dah
di-di-dah-di-di-dah
dah-dah-dah-dah-dah
di-di-di-dah-dah-dah-di-di-dit
dah-di-di-dah-di-di-dah-di-dit
••–•–
••••––
••–••–
–––––
•••–––•••
–••–••–••
INT
HM
IX
TTTTT
SOS
DDD
Some CW Abbreviations
73
88
ABT
AGN
ANT
BK
CPY
CQ
CUL
CU
DE
DEG
DX
ES
FB
FER
FREQ
GA
GE
GM
GN
HR
HW
K
MSG
46
Best regards
Love and kisses
About
Again
Antenna
Back; break
Copy
Calling any station
See you later
See you
From
Degree
Distance; rare station
And; "&"
Fine business; excellent
For
Frequency
Good afternoon
Good evening
Good morning
Good night
Hear; here
How
Go ahead
Message
NR
NW
OM
OP
R
RCVR
RIG
RITE
RST
SIGS
SKED
STN
TEMP
TKS
TNK
TNX
UR
U
WL
WTS
WX
XCVR
XMTR
XYL
YL
Number; near
Now
Old man
Operator
Are; received; roger
Receiver
Station equipment
Right
Readability, strength, tone report
Signals
Schedule
Station
Temperature
Thanks
Thank
Thanks
Your; you're; you are
You
Well; will
Watts
Weather
Transceiver
Transmitter
Wife (ex-young-lady)
Young lady
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Meaning of Q Signals
QRA
QRL
QRM
QRN
QRO
QRP
QRQ
QRR
QRS
QRT
QRU
QRX
QRZ
QSB
QSD
QSK
QSL
QSU
QSX
QSY
QTH
QTR
QTS
QUB
QUM
The name of my station is
Do not interfere, Frequency busy
Being interfered with
Static
Increase power, High power
Decrease power, Low power
Send faster
I am ready for automatic operation
Send more slowly
Stop sending
I have nothing for you
I will call again at ..., wait
Who is calling me, I am
Your signal is fading
Your keying is defective
I can hear you between my signals
I am acknowledging receipt
Reply on this frequency or mode
I am listening to ... on ... kHz
Change frequency, change to xmit on ... kHz
My location (home) is
The correct time is
I will send so my frequency can be measured
Here is the info you requested
The distress traffic has ended
Send a "?" after a Q signal to ask for information or an action.
Example: QRZ: station (call) is ....
QRZ?: what is your station (call)?
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
Setup Commands
Command
Via Menu
Via Paddle
Bank
[MENU] + [F1]
[MENU] + [F2]
[MENU] + [F3]
[MENU] + [F4]
[COM] + B#
Character Space
Char Space
[COM] + C#
Decrement
[DEC]
[COM] + D
Edit
--
[COM] + E##
Farnsworth
Farnsworth
[COM] + F##
Gap (Word Space)
Word Space
[COM] + G#
Handkey
Paddle: Handkey
[COM] + H
Iambic
Iambic
[COM] + I#
PTT Hang Time
PTT Hang Time
[COM] + J####
Keying Compensation
Key Compensation
[COM] + K##
Lag (Keying Delay)
Key Delay
[COM] + L##
Monitor
Monitor
[COM] + M#
Number
Serial Number
[COM] + N####
Output
Output
[COM] + O#
Paddle
Paddle
[COM] + P#
Queue
Queue
[COM] + Q#
Ratio
Speed Ratio
[COM] + R##
Speed
Overall Speed
[COM] + S##
48
Via Keyboard
Via Terminal
~B#
CTRL+B #
F9
F10
F11
F12
~C#
CTRL+C #
~D
CTRL+D
~E##
CTRL+E ##
~F##
CTRL+F ##
~G#
CTRL+G #
~H
CTRL+H
~I#
CTRL+I #
~J####
CTRL+J ####
~K##
CTRL+K ##
~L##
CTRL+L ##
~M#
CTRL+M #
ALT+F5
~N####
CTRL+N ####
~O#
CTRL+O #
ALT+F6
~P#
CTRL+P #
~Q#
CTRL+Q #
ALT+F7
~R##
CTRL+R ##
~S##
CTRL+S ##
CTRL+UP
CTRL+DOWN
CTRL+LEFT
CTRL+RIGHT
~B#
~C#
~D
~E##
~F##
~G#
~H
~I#
~J####
~K##
~L##
~M#
~N####
~O#
~P#
~Q#
~R##
~S##
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
Instruction Manual
Command
Via Menu
Via Paddle
Tone
Tone
[COM] + T##
User
User
[COM] + U#
reVerse
Reverse
[COM] + V
Weight
CCW Weight
CW Weight
[COM] + W####
Xmit (carrier tune)
[CXT]
[COM] + X
pulse tune
[PXT]
[COM] + Y
Zeroes and nines
Leading Zeroes
Other Zeroes
Nines
[COM] + Z###
Via Keyboard
Via Terminal
~T##
CTRL+T ##
SHIFT+UP
SHIFT+DOWN
SHIFT+LEFT
SHIFT+RIGHT
~U#
CTRL+U #
ALT+F1
ALT+F2
ALT+F3
ALT+F4
~V
CTRL+V
~W####
CTRL+W ####
ALT+UP
ALT+DOWN
ALT+LEFT
ALT+RIGHT
~X
CTRL+X
ALT+F8
~Y
CTRL+Y
~Z###
CTRL+Z ###
~T##
~U#
~V
~W####
~X
~Y
~Z###
Note: Terminal commands can be used via the keyboard, but not vice versa.
Table 4. Setup Commands.
 2001-2012 MFJ Enterprises, Inc.
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MFJ-495 Memory Keyer
Instruction Manual
Schematic
50
 2001-2012 MFJ Enterprises, Inc.
MFJ-495 Memory Keyer
 2001-2012 MFJ Enterprises, Inc.
Instruction Manual
51
MFJ-495 Memory Keyer
52
Instruction Manual
 2001-2012 MFJ Enterprises, Inc.
LIMITED 12 MONTH WARRANTY
MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises,
Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from
defects in material and workmanship for a period of 12 months from date of purchase provided the
following terms of this warranty are satisfied.
1.
The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit card or
money order receipt, etc.) describing the product to establish the validity of the warranty claim and
submit the original or machine reproduction of such proof of purchase to MFJ Enterprises, Inc. at
the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny warranty
without dated proof-of-purchase. Any evidence of alteration, erasure, or forgery shall be cause to
void any and all warranty terms immediately.
2.
MFJ Enterprises, Inc. agrees to repair or replace at MFJ's option without charge to the original
owner any defective product under warrantee provided the product is returned postage prepaid to
MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $12.00 covering
postage and handling.
3.
This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling the Service Department at 662-323-0549 or the MFJ Factory at
662-323-5869.
4.
This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.
5.
Wired and tested PC board products are covered by this warranty provided only the wired and
tested PC board product is returned. Wired and tested PC boards installed in the owner's
cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be
returned at the owner's expense unrepaired.
6.
Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to person or
property by the use of any MFJ products.
7.
Out-of-Warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product
provided the unit is shipped prepaid. All repaired units will be shipped COD to the owner. Repair
charges will be added to the COD fee unless other arrangements are made.
8.
This warranty is given in lieu of any other warranty expressed or implied.
9.
MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the products
previously manufactured.
10.
All MFJ products to be serviced in-warranty or out-of-warranty should be addressed to:
MFJ Enterprises, Inc.
300 Industrial Park Road
Starkville, Mississippi 39759 USA
and must be accompanied by a letter describing the problem in detail along with a copy of your
dated proof-of-purchase.
11.
This warranty gives you specific rights, and you may also have other rights which vary from state
to state.
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759
MFJ-495 Manual
Version 0E
Printed In U.S.A. 10/2012
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