MFJ | 826B | manual | MFJ 826B - DIGITAL SWR/WATTMETER, LCD, W/FREQ.COUNTER Manual

MFJ 826B - DIGITAL SWR/WATTMETER, LCD, W/FREQ.COUNTER Manual
Digital SWR/Wattmeter
Model MFJ-826B
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 2A
COPYRIGHT
C
2008-2010 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-826B Digital SWR/Wattmeter
Instruction Manual
Contents
THE BASICS
Introduction...................................................................................................................................... 1
Features............................................................................................................................................ 1
Specifications................................................................................................................................... 1
Front Panel....................................................................................................................................... 2
LCD Display ....................................................................................................................... 2
LCD Contrast Control......................................................................................................... 2
MODE Button..................................................................................................................... 2
PEAK Button ...................................................................................................................... 2
ALRM LED ........................................................................................................................ 3
ALARM Button .................................................................................................................. 3
POWER Button................................................................................................................... 3
Back Panel ....................................................................................................................................... 3
Power .................................................................................................................................. 3
RS-232 ................................................................................................................................ 3
Ground ................................................................................................................................ 3
Antenna............................................................................................................................... 3
Transmitter.......................................................................................................................... 3
Installation ....................................................................................................................................... 4
THE MENUS
Main Mode Menus........................................................................................................................... 4
Digital Wattmeter Menu ..................................................................................................... 4
Power Bar Meter Menu....................................................................................................... 4
SWR Bar Meter Menu ........................................................................................................ 5
SWR/Power Bar Meters Menu ........................................................................................... 6
Setup Mode Menus .......................................................................................................................... 6
Meter Range Menu ............................................................................................................. 7
Alarm SWR Menu .............................................................................................................. 7
Beep Menu.......................................................................................................................... 7
APPENDICES
Factory Defaults............................................................................................................................... 7
Self Test ........................................................................................................................................... 8
SWR Bridge Calibration .................................................................................................................. 9
Frequency Counter Calibration...................................................................................................... 10
In Case of Difficulty ...................................................................................................................... 10
Technical Assistance...................................................................................................................... 10
© 2008-2010 MFJ Enterprises, Inc.
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MFJ-826B Digital SWR/Wattmeter
Instruction Manual
FIGURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
MFJ-826B Front Panel .................................................................................................... 2
MFJ-826B Back Panel..................................................................................................... 3
Power Bar Meter (High Range)....................................................................................... 5
Power Bar Meter (Mid Range) ........................................................................................ 5
Power Bar Meter (Low Range) ....................................................................................... 5
SWR Bar Meter ............................................................................................................... 5
Main Mode Menus Display ............................................................................................. 6
TABLES
Table 1. Failure Messages............................................................................................................... 8
ii
© 2008-2010 MFJ Enterprises, Inc.
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
The Basics
Introduction
The MFJ-826B digital SWR/Wattmeter/Frequency Counter measures up to 1500 watts. It has three highresolution ranges with accuracy in each range from 1.8 to 54 MHz. True peak or average forward and
reflected watts, SWR and frequency can be simultaneously displayed.
There are also auto-ranging bar meter modes to display forward and reflected power, SWR and power
twin bar meters, or SWR only bar meter; SWR and forward power are also displayed numerically.
PeakHoldTM feature freezes the highest forward power displayed bar segment for one, two or three
seconds. These digital-analog displays make it visually easy to tune antenna tuners, amplifiers and
transmitters.
There are three high-resolution forward/reflected power ranges that are automatically selected: a QRP
range (25 watts full scale), a mid-range (250 watts full scale) and a high-range (1500 watts full scale).
TrueActiveTM peak reading circuit gives true peak or average power on all modes.
Built-in frequency counter gives any transmitter digital frequency readout in continuous carrier mode.
Perfect for older and QRP rigs such as MFJ-9420 travel radios and MFJ-9340 QRPCubsTM.
The MFJ-826B enters a “sleep” mode when idle and when no transmit signal is present, turning off the
microprocessor clock to avoid the generation of spurious signals.
Features
•
•
•
•
•
•
•
•
•
Power range of 25, 250 or 1500 watts
1.8 to 54 MHz continuous frequency coverage
Adjustable alarm SWR from 1.5 to 3.0
Multifunction backlit LCD display with contrast control
Numeric readings for frequency, SWR, forward and reflected power
Bar meters for SWR, forward and reflected power with auto-ranging
Peak or average power mode
Built-in frequency counter
Built-in bootloader for field upgradeable firmware
Specifications
•
•
•
•
•
•
•
•
RF power range
Frequency range
Frequency counter accuracy
A/D conversion resolution
Forward power display resolution
Reflected power display resolution
SWR display resolution
Power bar meters resolution
© 2008-2010 MFJ Enterprises, Inc.
:
:
:
:
:
:
:
:
25, 250 or 1500 watts
1.8 to 54 MHz continuous coverage
±1 kHz
10-bit
0.1 for < 100 watts and 1 for ≥ 100 watts
0.1 for < 10 watts and 1 for ≥ 10 watts
0.01 for < 10:1 and 0.1 for ≥ 10:1
60 segments
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MFJ-826B Digital SWR/Wattmeter
Instruction Manual
•
•
•
•
•
•
•
•
•
•
•
SWR bar meter resolution
Memory endurance
Memory data retention
Power supply requirement
Current consumption
Dimensions (projections included)
Display
TRANSMITTER connector
ANTENNA connector
POWER connector
RS-232 connector
†
Specifications and design are subject to change without notice or obligation.
:
:
:
:
:
:
:
:
:
:
:
56 segments
1 million erase/write cycles typical
100 years typical
12 - 15 volts DC
250 milliamps or less
6 ½ × 2 ¾ × 6 ¾ in; 165 × 70 × 171 mm (w × h × d)
2-line × 16-character backlight LCD
SO-239
SO-239
2.1 × 5.5 mm coaxial plug, center pin positive
D-sub 9-pin
Front Panel
SWR
DIGITAL
SWR / WATTMETER
14.100MHz
1.12
FWD=1500 REF=5.0
1
0
1.2
25
1.5 2
50
75
3
100 300
SWR
PWR
ALM
MODEL
MFJ-826B
MODE
PEAK
ALARM
POWER
Figure 1. MFJ-826B Front Panel.
•
LCD Display: A 2-line by 16-character alphanumeric display with backlight. It displays the unit’s
various menus and status. The display contrast can be adjusted by the LCD contrast control on the
front panel. Below the display are the SWR and power bar meter scales. Refer to Figure 7 for
descriptions of the various displayed information.
•
LCD Contrast Control: A trimpot control that adjusts the contrast of the LCD display. Use a small
flat blade screwdriver, insert into the small hole to the left of the display, and turn clockwise to
increase contrast.
•
MODE Button: Time-sensitive and used to navigate through the various main menus and to enter or
exit the setup menus.
•
PEAK Button: Used to select peak or average power mode; one beep indicates peak hold time of
one second, two beeps for two seconds, three beeps for three seconds, and four beeps for average
mode. Peak envelope power (PEP) is measured by selecting a peak mode with selectable peak hold
2
© 2008-2010 MFJ Enterprises, Inc.
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
time. A small “1”, “2” or “3” appears on the display to indicate peak mode is on and the number
represents the peak hold time in second. A small “A” appears to indicate average mode.
•
ALRM LED: Illuminates when the SWR is greater than the selectable alarm SWR.
•
ALARM Button: Used to toggle the alarm feature on and off. When enabled, the ALRM LED will
light and the buzzer will sound when the SWR is greater than the selectable alarm SWR.
•
POWER Button: Used to turn the unit on and off. Press to turn power on; press again to turn power
off.
WARNING: Do not turn the power on and off rapidly, otherwise the unit’s setting memory
can be corrupted and the unit will have to be reset to factory defaults.
Back Panel
ANTENNA TRANSMITTER
GROUND
+
POWER
12VDC
250mA
RS-232
MFJ ENTERPRISES, INC.
STARKVILLE, MS USA
Figure 2. MFJ-826B Back Panel.
•
Power: This jack accepts a standard 2.1 × 5.5 mm coaxial plug with positive center and negative
sleeve. The unit requires 12 volts DC at up to 250 milliamps. The use of a regulated supply is not
mandatory but is recommended for best performance. An optional 12 volts DC 500 milliamp power
supply, the MFJ-1312D, is available from MFJ Enterprises, Inc.
WARNING: Do not apply voltages greater than 18 volts to this unit, or permanent damage
to the unit may result.
•
RS-232: DB-9 female connector for connecting to the computer’s RS-232 serial port to update
firmware. Check http://www.mfjenterprises.com/support.php for the latest version of the firmware.
•
Ground: Wing-nut terminal for RF ground wire connection.
•
Antenna: SO-239 connector for coax cable from antenna or dummy load.
•
Transmitter: SO-239 connector for coax cable from transmitter or transceiver.
© 2008-2010 MFJ Enterprises, Inc.
3
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
Installation
1. Place the wattmeter in a convenient location at the operating position.
2. Install the wattmeter between the transmitter and the desired antenna. Use good quality coaxial cable
(such as RG-8/U) to connect the transmitter (or amplifier) to the rear panel connector marked
TRANSMITTER.
3. Connect the antenna to the rear panel connector marked ANTENNA.
4. A GROUND post is provided for an RF ground connection.
5. Connect a 12 to 15 VDC power source capable of 250 milliamps to the rear panel jack marked
POWER.
The Menus
Main Mode Menus
The main mode menus show various wattmeter settings and status. There are four main mode menus
arranged in a “wrap-around” structure. When powered on, wattmeter operation starts with the main menu
that was last used. Within each main menu, press the [MODE] button briefly to view the next main
menu. Press and hold the [MODE] button for two seconds to enter the setup mode (see below). Refer to
Figure 7 for details on the displayed information.
Note:
In sideband mode, the frequency readout on the wattmeter display jumps around to different
frequencies while transmitting and stops on another frequency when un-keyed. This is
normal and is a characteristic of sideband mode, because sideband signals jump around in
frequency and power.
Digital Wattmeter Menu
Shows the frequency, SWR, and forward and reflected power in watts.
Power Bar Meter Menu
Shows the frequency, SWR, forward power, and bar meters for forward and reflected power. The top bar
meter is the forward power and the bottom bar meter is the reflected power. The numeric reading of
forward power appears at the end of the bar meters. A power scale is printed just below the display on the
front panel. Each power bar meter consists of 60 bar segments. When in the high power range, multiply
the readings on the printed power scale by ten, and each vertical bar segment consists of four dots. Below
1000 watts, each bar segment represents 20 watts; above 1000 watts, each bar segment represents 200
watts. The forward bar meter has a “peak hold” feature. The peak meter hold function freezes the highest
displayed bar segment of the forward power for approximately one, two or three seconds, so that you can
more easily read the meter. This function can be turned ON and OFF with the PEAK button.
When in the mid power range (250 watts scale), each vertical bar segment consists of three dots. Below
100 watts, each bar segment represents two watts; above 100 watts, each bar segment represents 20 watts.
For low-power, meter range of 25 watts is available. When in the low power range, divide the readings
on the printed power scale by ten, and each vertical bar segment consists of two dots. Below 10 watts,
each bar segment represents 0.2 watts; above 10 watts, each bar segment represents two watts.
4
© 2008-2010 MFJ Enterprises, Inc.
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
The power meter default condition is auto ranging. Auto range automatically sets the meter scale
according to the input RF power to the wattmeter. Forward power greater than 25 watts automatically
sets the meter to the mid power range; forward power greater than 250 watts automatically sets the meter
to the high power range. Forward power less than 200 watts automatically set the meter to the mid power
range; forward power less than 20 watts automatically set the meter to the low power range.
0
25
50
75
100 300
Multiple scale
by 10
PWR
Figure 3. Power Bar Meter (High Range).
0
25
50
75
100 300 PWR
Figure 4. Power Bar Meter (Mid Range).
0
25
50
75
100 300
Divide scale
by 10
PWR
Figure 5. Power Bar Meter (Low Range).
SWR Bar Meter Menu
Shows the frequency, SWR, forward power, and SWR bar meter.
A SWR scale is printed just below the display on the front panel.
The 12-block (56-segment) SWR bar meter indicates SWR of 1.00,
1.01-1.10, 1.11-1.20, 1.21-1.30, 1.31-1.40, 1.41-1.50, 1.51-1.70,
1.71-2.00, 2.01-2.50, 2.51-3.00, 3.01-5.00, 5.01-10.0 and infinity.
The numeric reading of forward power appears at the end of the
bar meter.
1
1.2
1.5
2
3
reflected power
forward power
SWR =
reflected power
1−
forward power
1+
SWR
Figure 6. SWR Bar Meter.
© 2008-2010 MFJ Enterprises, Inc.
5
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
SWR/Power Bar Meters Menu
Shows the SWR bar meter on the top line and the power bar meters on the bottom line of the display. The
numeric readings of SWR and forward power appear at the end of the bar meters.
1
2
3
1
Frequency
2
Indicator: Average/Peak (1,2,3 sec)
3
SWR
4
Forward power in watts
6
5
Reflected power in watts
7
6
Forward power bar meter
4
7
Reflected power bar meter
3
8
SWR bar meter
4
5
1
2
1
2
3
8
4
8
3
6
7
4
Figure 7. Main Mode Menus Display.
Setup Mode Menus
The setup mode menus allow you to configure the MFJ-826B for the way you want it to behave. There
are three setup mode menus arranged in a “wrap-around” structure. To access these setup menus, press
and hold the [MODE] button for two seconds. The setup menu that will display is the one that was last
used. When finished, press the [MODE] button for two seconds to go back to the main mode for normal
operation. If no button is pressed for more than eight seconds, the unit automatically exits the setup mode
and returns to the main mode.
6
© 2008-2010 MFJ Enterprises, Inc.
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
Within each setup menu:
•
•
•
Press the [MODE] button briefly to cycle through the setup menus. Press and hold the [MODE]
button for two seconds to exit the setup mode and go back to the main mode.
Press the [PEAK] button to increase or turn on the setting for the current setup menu.
Press the [ALARM] button to decrease or turn off the setting for the current setup menu.
Meter Range Menu
Allows you to select the meter scale range. Low range has full scale of 25 watts, mid range has full scale
of 250 watts, and high range has scale of 1500 watts. Auto range automatically sets the meter scales
according to the input RF power to the wattmeter. Forward power greater than 25 watts automatically
sets the meter to the mid power range; forward power greater than 250 watts automatically sets the meter
to the high power range. Forward power less than 200 watts automatically set the meter to the mid power
range; forward power less than 20 watts automatically set the meter to the low power range. Default is
AUTO Range.
Alarm SWR Menu
Allows you to set the alarm SWR from 1.5 to 3.0. The ALRM LED will light and the buzzer will sound
when the SWR is above the alarm SWR. Default is 3.0.
Beep Menu
Acknowledgement beep sounds each time a parameter is changed to acknowledge it. This also controls
the CW notification of “QRP”. If more than 1500 watts is applied to the unit, the unit will flash
DECREASE POWER three times and send “QRP” (dah-dah-di-dah di-dah-dit di-dah-dah-dit) on CW.
This function can be turned OFF for silent operation. Default is ON.
Appendices
Factory Defaults
Each time the wattmeter is powered off, the microprocessor saves all memories and configurations to
non-volatile memory ready to be used the next time the unit is turned on. If the unit is not working
properly, even on initial power on, try resetting to the factory defaults.
The unit is shipped with the following default settings:
•
•
•
•
•
•
•
Main Menu
Setup Menu
Meter Range
Alarm SWR
Beep
Peak Hold
Alarm
© 2008-2010 MFJ Enterprises, Inc.
Digital Wattmeter
Meter Range
Auto
3.0
On
Off (Average)
On
7
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
To reset the unit to these defaults:
1.
2.
3.
4.
Turn off the power to the unit.
Press and hold only the [PEAK] button while turning the power on.
Release the buttons when DEFAULTS RESET appears on the display.
Resume with normal operation.
WARNING:
If the MFJ-826B is not behaving properly or acting erratic, try resetting the unit
to factory defaults.
Self Test
A self-test routine will check the functions of the MFJ-826B. This routine checks the display, the frontpanel buttons, the internal memory, the audio circuitry, and the power-down circuitry. During the selftest, 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.
Note:
Performing the self-test will reset the unit to its factory default settings.
Here is the self-test procedure:
1. Turn off the power to the unit.
2. Press and hold only the [MODE] button while turning the power on.
3. The test begins by displaying a copyright message and firmware version numbers, such as
COPYRIGHT (c) 2008-20YY MFJ ENTERPRISES, INC. VERSION YYWW.BB. This is
the test of the display. Release the [MODE] button before the message completes.
4. You will be prompted to press each of the front-panel buttons: [MODE], [PEAK] and [ALARM].
5. The unit then tests its non-volatile memory. Notice this step will reset the unit to its factory default
settings.
6. If the unit is okay, the ALRM LED will turn on steady, a repetitive message PASS will be displayed
and sent as Morse code (di-dah-dah-dit di-dah di-di-dit di-di-dit). If there is a problem, the ALRM
LED will blink continuously, a failure message will be displayed and sent repetitively.
7. Once you have confirmed that the audio is okay, turn the unit off.
8. Turn the unit on again to test the power-down detection circuitry.
9. If the power-down detection circuitry is okay, the ALRM LED will turn on steady, a repetitive
message PASS will be displayed and sent as Morse code (di-dah-dah-dit di-dah di-di-dit di-di-dit). If
there is a problem, the ALRM LED will blink continuously, message PD FAIL will be displayed
and sent as Morse code repetitively.
10. Turn the power off.
Failure
Message
ALARM FAIL
MEMORY FAIL
MODE FAIL
PD FAIL
PEAK FAIL
WAKEUP FAIL
Indicates
[ALARM] button is shorted or improperly connected.
Non-volatile memory circuitry is improperly connected.
[MODE] button is shorted or improperly connected.
Power-down circuitry problem.
[PEAK] button is shorted or improperly connected.
Microprocessor wakeup circuitry problem.
Table 1. Failure Messages.
8
© 2008-2010 MFJ Enterprises, Inc.
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
SWR Bridge Calibration
To calibrate the SWR Bridge, you will need a transmitter capable of 100 watts output, a precise calibrated
wattmeter, a 50-ohm dummy load, three 50-ohm SO-239 coax cables, a Phillips screwdriver, and a tuning
tool or small flat blade screwdriver.
WARNING: Do not touch anything inside the wattmeter during operation! Serious, painful RF
burns can result.
WARNING: Never operate the MFJ-826B with its cover removed; dangerous voltages and
currents can be present during operation. Never exceed wattmeter specifications.
1. Turn off the power to the unit and the transmitter.
2. Remove the cover from the unit (4 screws) with a Phillips screwdriver.
3. Connect the 50-ohm dummy load to the ANTENNA connector; connect the calibrated wattmeter
between the transmitter and the TRANSMITTER connector on the unit.
4. Turn on the power to the transmitter. Using a frequency in the middle of the HF band, such as 7.253
MHz, for calibration is recommended.
5. Press and hold both the [MODE] and [PEAK] buttons while turning the power on.
6. The top line will display F: 0.0 0.0 0.0 to show the forward power and the bottom line will
display R: 0.0 0.0 0.0 to show the reflected power. Key the transmitter to output 100 watts
and adjust trimmer capacitor VC1 (located in front of the coax connectors) for minimum reflected
power.
7. Key the transmitter to 100 watts output and adjust the FWD trimpot VR1 until the left F number
shows forward power of 100 watts.
8. Key the transmitter to 100 watts output and adjust the trimpot VR3 until the center F number shows
forward power of 100 watts.
9. Key the transmitter to 20 watts output and adjust the trimpot VR5 until the right F number shows
forward power of 20 watts.
10. Turn off the transmitter and reverse the ANTENNA and TRANSMITTER connections; that is,
connect the 50-ohm dummy load to the TRANSMITTER connector and connect the
transmitter/wattmeter to the ANTENNA connector.
11. Turn on the transmitter’s power.
12. Key the transmitter to 100 watts output and adjust the REF trimpot VR2 until the left R number
shows reflected power of 100 watts.
13. Key the transmitter to 100 watts output and adjust the trimpot VR4 until the center R number shows
reflected power of 100 watts.
14. Key the transmitter to 20 watts output and adjust the trimpot VR6 until the right R number shows
reflected power of 20 watts.
15.
16.
17.
18.
Turn off the power to the unit and the transmitter.
Remove the transmitter/wattmeter and the 50-ohm dummy load from the unit.
Secure the cover back onto the unit.
Connect your transmitter to the TRANSMITTER connector and connect your antenna to the
ANTENNA connector on the unit.
© 2008-2010 MFJ Enterprises, Inc.
9
MFJ-826B Digital SWR/Wattmeter
Instruction Manual
Frequency Counter Calibration
To calibrate the frequency counter, you will need a transmitter, a 50-ohm dummy load, two 50-ohm SO239 coax cables, a Phillips screwdriver, and a tuning tool or small flat blade screwdriver.
WARNING: Do not touch anything inside the wattmeter during operation! Serious, painful RF
burns can result.
WARNING: Never operate the MFJ-826B with its cover removed; dangerous voltages and
currents can be present during operation. Never exceed wattmeter specifications.
1. Turn off the power to the unit and the transmitter.
2. Remove the cover from the unit (4 screws) with a Phillips screwdriver.
3. Connect the 50-ohm dummy load to the ANTENNA connector and connect the transmitter to the
TRANSMITTER connector on the unit.
4. Turn on the power to the transmitter. Set and lock the frequency to exactly 29.000 MHz.
5. Press and hold both the [MODE] and [ALARM] buttons while turning the power on. A message CAL
FREQ 29.000 will display.
6. Key the transmitter to output about 10 watts. Adjust trimmer capacitor VC2 (located next to the big
integrated circuit) until the unit displays a frequency of 29.000MHz. Nominal tolerance of the
frequency counter is ±1 kHz.
7. Turn off the power to the unit and the transmitter.
8. Secure the cover back onto the unit.
In Case of Difficulty
If the LCD screen is blank, check adjustment of the contrast control.
If the wattmeter acts erratic, reset the wattmeter to factory defaults.
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 facsimile (FAX) to 662-323-6551; or by email to techinfo@mfjenterprises.com. Send a
complete description of your problem, an explanation of exactly how you are using your unit, and a
complete description of your station. Also include the firmware version number of your unit.
10
© 2008-2010 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 $10.00 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-826B Manual
Version 2A
Printed In U.S.A. 01/2010
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