HF-SSB MICOM-500E Model G761AA / G762AA

Owne ’ Ma 6802952C60

HF-SSB

MICOM-500E-A

Owne s

6886858J01-A

HF-SSB Micom –500E-A

CONTENTS

Introduction............................................................................................................................................2

General Specifications ...........................................................................................................................2

Block diagram........................................................................................................................................3

Controls and indicators ..........................................................................................................................4

General principles of operation..............................................................................................................5

500W HF Linear Amplifier Unit ...........................................................................................................6

DC Power Supply ..................................................................................................................................7

Junction Box ..........................................................................................................................................7

Performance Specifications ...................................................................................................................8

500W Transceiver Model Complements .............................................................................................11

Trouble Shooting .................................................................................................................................11

Radio Tuning Procedure ......................................................................................................................12

ALE......................................................................................................................................................12

1

HF-SSB Micom –500E-A

INTRODUCTION

The transceiver is a complete unit that includes Micom-2ET, 500watts amplifier , power supply, nc os oge her a 19” dr we The c of he r di i pl c he dr wer f ont panel. The unit includes a movable drawer, which allows to detach the control panel of the radio and moved up to 5 meters away (cable extension included).

The transmitter amplifier is microprocessor controlled, doing the following functions:

- Adjust amplifier input sensitivity

Monitor heat, VSWR, and under voltage conditions,

Setting the power output via the channel power setting (Max, High, Medium and Low)

GENERAL SPECIFICATION

Power Output:

Band Switching:

Input Voltage:

Cooling:

1.6-30MHz: 500W PEP and average

Fully Automatic

220VAC-10A /110VAC-20A

Cooling fans

T/R Switching time: 10mS nominal

Band Switch time: 100mS nominal

Protection: Input over drive under voltage (adjustable):

Factory default 28+/-3 VDC Amplifier module

Current imbalance VSWR faults Frequency out of

Specified range over current over temperature.

2

MICOM-500W BLOCK DIAGRAM

HF-SSB Micom –500E-A

110/220 AC

RADIO

SW

ON/OFF

13.8v

POWER

SUPPLY

RF OUT

28v

RF IN

AMP

FAN

SENS

RF

OUT

NOTE: ALL THE WIRES AND CABLES CAT No - 01MB000027

CONTROL HEAD

J-BOX

TO ANTENNA

3

HF-SSB Micom –500E-A

Controls and Indicators

Indicator VOLT –shows when power supply voltage is out of limits.

In OVER –input overload indicator. Input power is out of limits.

VSWR –load circuit failure indicator.

K

FAILURE –fatal failure indicator, further amplifier operation is impossible.

TX –transmission mode indicator.

Figure 1. PA 500 front panel

Controls and Indicators

Power Amplifier module has the following controls and indicators:

Indicator VOLT –shows when power supply voltage is out of limits.

In OVER –input overload indicator. Input power is out of limits.

TEMP –amplifier overheat indicator.

VSWR –load circuit failure indicator.

FAILURE –fatal failure indicator, further amplifier operation is impossible.

TX –transmission mode indicator.

BYPASS –bypass mode indicator. The amplifier shall operate in this mode when it is disconnected to power supply, faulty, can not operate by any other reason or is in receive mode.

BAND OUT indicator shows that input signal frequency is out of operation band.

4

HF-SSB Micom –500E-A

General principles of operation l ve

Block diagram of the power amplifier is shown at Fig.4. Input RF signal with 25W nominal ome t onne t o TS1 227 boa d of mpl yi vi e consisting of 4-channel power splitter and 4-channel amplifier. The power splitter unit contents:

 Input signal level sensor;

 Input relay Rx/Tx that provides the possibility to operate in BYPASS mode;

 Input signal attenuator used by the amplifier protection system;

 Signal frequency sensor;

 Power splitter.

The signal comes from power splitter output to four 150W amplifying sections inputs.

Then, amplified signal is summed by power Combiner (TS5 226).

t out

The signal then comes from Combiner output to harmonic filter (TS5 223) input and then e s or out e Tx nd put onne or OUT”.

The controller provides the power amplifier control, status monitoring and its protection in emergency situations. By analyzing the input signal level, the controller provides protection of the amplifier input against overloading. By measuring the input signal frequency the controller selects and switches on appropriate harmonic filter. Control system also provides the control of the amplifier sink temperature. Depending of its level the forced air cooling system shall be switched on or output power level shall be reduced if necessary and if the temperature limit is exceeded the amplifier shall be switched to BYPASS mode. By analyzing signals from output sensor the controller monitors the status of load, and if VSWR in the load is higher than maximum allowed one the controller decreases output power, and if VSWR is higher than 4 the controller switches the amplifier to BYPASS mode.

Besides, the controller sends to CONTROL output connector the signals that proportional to forward and reflected power at the amplifier output and that assigned for output power control from an external device, for example, exciter.

Thus, the amplifier control system provides full its status and operability control. It switches the amplifier to BYPASS mode in the following cases:

 VSWR > 1:4

 Input signal frequency is out of operation band

 The temperature mode is out of limits

 In other cases, as well as in switched off mode when normal operation of the amplifier is impossible. In that case the possibility of normal operation of external transceiver is provided.

5

HF-SSB Micom –500E-A

MICOM 2E-Trunk

For Micom 2E-Trunk specification see user manual 6802952C60

500W HF Linear Amplifier Unit

Input Voltage:

Power Output:

28 VDC

1.6-30MHZ: 500W PEP and average

The power amplifier is fully protected by microprocessor control. This circuitry dynamically monitors all amplifier parameters, and provides adjustments and protection against high VSWR, under voltage, over current and high temperature conditions.

Current- protection against over current condition (exceeding 60 amps) and current imbalance between amplifier modules (exceeding 20%). When one of these two conditions exists, the amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the unit.

Volt - protection against under amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the voltage condition (less than 28+/-3 VDC). When this condition exists, the unit.

VSWR –when a sampled VSWR exceeded 4:1 and the power reflected back to the amplifier is higher than acceptable, the amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the unit.

Temp - protection against over temperature condition

Atten –as input RF power level increases beyond 60-70 watts, the attenuation increases automatically. The Attenuate remains engaged until the input drops to 30 watts.

ALC Control- provides adjustable ALC feedback voltage.

A positive voltage is present on the Amplifier line for use with the equipped transceiver for ALC input control.

PTT keying mode and Band input filter selection enabled automatically. Band switching time is typically 100 msec or less.

This automated capability is ideal for remote or unattended operating site application.

6

HF-SSB Micom –500E-A

3.

DC Power Supply

Model: EWS1500-15

Nominal Output Voltage: 28V-50A----14V-30A

Input Voltage Range: 85~132 VAC / 170~265 VAC (Auto Selectable), 47~63 Hz

110/220 VAC power supply - if need to convert the power supply from 220VAC to 110VAC, please detached the 110/220VAC panel at the rear panel of the unit and short the A and B terminals.

The ON/OFF switch on the front panel of the unit, enables to turn the power supply output on and off.

Note that, when the dc output power supply is on OFF mode, the internal power supply fans still work.

4.

Junction Box

The junction box enables the connection of up to four external devices simultaneously, in addition to

Potentiometers adjust - Potentiometers are used to adjust the received audio levels (one of each connector). Each potentiometer is associated with a connector as follows:

ACC. -J1: RX1

ACC. -J2: RX2

ACC. -J3: RX3

ACC. -J4: RX4

The potentiometers are located on the rear panel of the MICOM-500E.

For more details see Service Manual 68P02952C55

7

HF-SSB Micom –500E-A

PERFORMANCE SPECIFICATIONS for 500W TRANSCEIVER

GENERAL

Frequency Range XMIT

Frequency Range RX

RF Input Impedance

Number of Channels

Scanning

1

Frequency Stability

1.6 –30 MHz

0.1 –30 MHz (0.1 - 1.6 MHz reduced spec)

50 Ohms

200 SIMPLEX or HALF DUPLEX

5 groups with up to 100 channels per group, including 1 guard channel.

Programmable scan rate: 1 - 5 sec. per channel, in 1 sec. steps

0.6 PPM @ -10

to 60C

1 PPM/year Frequency Drift (Aging)

Synthesizer Lock Time

Frequency Resolution

Operating Temp. Range

Storage Temp. Range

Humidity

Remote Control Interface

Modes of Operation

10 msec. Max

10 Hz

-10

to +60C

-30

to +70C

95% @ 50

C

RS232C (Optional)

J3E SSB

R3E PILOT

H3E AME

J2A CW

J2B RTTY, ARQ, FEC, PACKET, MCW

B8C FAX, DATA, FSK

Dimensions

Height (mm/inch)

Width (mm/inch)

265/

422/

10.43

16.61

Depth (mm/inch) 508/20

CURRENT CONSUMPTION @ 14 VDC / 28VDC ( INTERNAL CURRENT )

XMIT Voice (500 W P.E.P.) 38 Amp

Receive Full Audio

Squelch

2 Amp

1.7 Amp

1

ALE specification see user manual 6802952C60

8

HF-SSB Micom –500E-A

TRANSMITTER

Output Power

Reduced Power Levels

Audio Bandwidth

2

Audio Bandwidth Ripple

Intermodulation

Spurious Emissions

Carrier Suppression

Undesired Sideband

Suppression

500W P.E.P. and average +/-1dB

500W, 400W, 300W, 200W (RSS programmable)

3 dB

-31 dB / 500W P.E.P

-60 dB / 500W P.E.P

-50dB / 500W P.E.P

-55dB / 500W P.E.P

Audio Distortion 2.5%

1/2 Power Mic. Sensitivity 15 to 125mV (RMS)/600 Ohms

Hum & Ripple -50 dB

Inband Noise

TX/RX Switching Time

Tx Tuning Adjustments

3

-60 dB (30 Hz BW)

10 msec

None

RECEIVER

Sensitivity (SINAD) SSB 0.5

V for 10 dB SINAD (0.35 V Typical. Note 1)

0.1 - 1.6 MHz with reduced performance

1/2 Rated Power Sensitivity 1

V for 2.5W audio at speaker

Selectivity

2

- 6 dB @ 350 to 2700 Hz

–60 dB @ -1 kHz; +4 kHz

Image Rejection

IF Rejection

-80 dB

-85 dB

RECEIVER (continued)

2

See Micom 2E spec. for more Bands widths.

3

For tune procedure wait about 2 sec when stepping from one channel to another before transmitting.

9

HF-SSB Micom –500E-A

Undesired Sideband Rejection -55 dB @ -1 kHz

Spurious

Intermodulation

-80 dB

-80 dB

Crossmodulation

Desensitization

Reciprocal Mixing

Audio Power at Speaker

RGC Range

RGC Time Constants

Voice

-100 dB @ 100 kHz

-100 dB @ 100 kHz

-100 dB @ 100 kHz

5W @ 2.5% distortion

5

V to 1V (2 dB change in output level)

Attack time 10 msec

Release time 1500 msec

Data

Squelch

Clarifier Range

Attack time 10 msec

Release time 10 msec

Constant SINAD (digital)

200 Hz

Receiver Tuning Adjustments None

Maximum Antenna Input 20 kV transient, 100V RMS for 2 minutes

CONTROLS

Standard and optional: volume, on/off, scroll, squelch, scan, USB/LSB, call, monitor, priority, func and accessory/programming connector.

Specifications subject to change without notice.

10

HF-SSB Micom –500E-A

500W TRANSCEIVER MODEL COMPLEMENTS

M81AMN0KV5AK * MICOM-2ET

FDN6144A

FPN5585A

FRN5865A

01MB000027

01MB000029

01MB000030

FMN1615A

Amplifier 500 watts

Power supply

Junction box

Cables

Chassis

Miscellaneous

Microphone

* NOTE:

LORD No-FLN3179A

HIGH POWER N oFLN3180A with interface modification for 500w amplifier

TROUBLE SHOOTING

In case of malfunctioning, perform the following steps (refer to the Maintenance

1. Turn OFF and ON the radio switch to reset both the radio and the amplifier.

2. Use BITE when the channel is in SSB mode only

3. Refer to the User Troubleshooting Chart.

4. Follow the troubleshooting procedures in this section, which provide instructions for isolating faulty boards.

Troubleshooting a board at component level should be performed according to the notes on the relevant schematic diagram.

FAULT

VOLT trip off-line

VSWR trip off-line

Amp TEMP led is on.

No PTT Keying

ADVICE

Ensure power supply maintains voltage greater than 11.0VDC

under load. Check DC cable connections.

Check integrity of antenna and feedline connections.

Check for evidence of arc-over or dielectric breakdown of feedline. Ensure antenna is resonant (<2:1 SWR) at the desired operating frequency.

Reduce drive level or duty-cycle. Ensure fan unit is operating properly.

Ensure transceiver, amplifier and DC supply all utilized a common ground.

11

HF-SSB Micom –500E-A

RADIO TUNING PROCEDURE

Before operating the 500W transceiver, a calibration procedure should been taken.

An IBM PC and RSS (Radio Service Software) package, FLN2514, are required to align the radio.(factory setting)

1.

On cc s i s ct e e mar t of he Ampl i ”.

2. There are 4 steps of power outputs as noted above. If you need to perform a power calibration, please refer to the power calibration procedure in the

MICOM-2E RSS manual.

ALE

Automatic Link Establishment (ALE) is an embedded feature inside the Micom-2E/R

ALE family of mobile/fixed station HF-SSB radios.

Through the combined use of channel scanning, selective calling and Link Quality

Analysis, ALE automatically selects the best available communications link. It is no longer necessary for an operator to be familiar with the varying factors, which affect high frequency (HF) propagation between two points.

Each ALE equipped Micom-2 ALE family radio stores a matrix of Link Quality Analysis

(LQA) scores for all other stations in the HF network. Memorized LQA scores are derived from an analysis of channel "soundings" which are periodically transmitted by each network station. When an operator selects the individual or net call address of the receiving station, ALE automatically determines the optimum available channel and automatically initiates calling procedures. Sending and receiving operators are alerted when a communication link has been established.

12