Mechanics & Electronics ME1500-FD GS35B Operating Manual Download Page 4

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1.5 The PA is constructed with the following protection circuits and useful features:

Heat up time checking circuit

Protection circuits (Ia, Ig1, temp, SWR>3)

Temperature dependent ventilating speed control

Cooling fans (2 pcs)

Function and status indicator LEDs (6 pcs)

1.8KVA transformer

Built in 3-way PIC controlled sequencer

4 LED bargraph on new front page version (PWR out, VSWR, Ig, Ia)

Summary of Contents for ME1500-FD GS35B

Page 1: ...RATING MANUAL ME1500 FD 4 6m LINEAR AMPLIFIER GS35B LED BARGRAPH VERSION Mechanics Electronics Inc Hungary Draskovits G bor HA1YA Szombathely K rp ti K u 43 H 9700 e mail ha1ya chello hu www ha1ya hu...

Page 2: ...2 C O N T E N T 1 0 General overview 3 2 0 Specifications 5 3 a Front Panel 6 3 b Rear Panel 8 4 0 Installation 9 5 0 Troubleshooting 10 6 0 Drawings 12...

Page 3: ...N control of the TCVR is not fit for the TCVR is regularly activating the protection of the Linear In case of lately designed equipment the output power of the TCVR is control of the radio 1 2 The SWR...

Page 4: ...up time checking circuit Protection circuits Ia Ig1 temp SWR 3 Temperature dependent ventilating speed control Cooling fans 2 pcs Function and status indicator LEDs 6 pcs 1 8KVA transformer Built in...

Page 5: ...ommon outp Driving Power 0 100W max on both bands Input WSVR max 1 1 5 on both bands In Out impedance 50 Ohm separate input bands Valve s GS35B T R System PIC sequencer OPEN COLL OK Harmonic supressio...

Page 6: ...the PA 5 OPR LED Glows when the PA is ready for transmission During heating up period when the LED doesn t lit the driving is blocked The stby time is about 180 sec 6 WAIT LED Blinking during the heat...

Page 7: ...ide capacitor Used for tuning the PA for max output 13 turn vacuum capacitors here The position of the capacitors is different on 4m an 6m both about 3 4 turns right direction on 4m lower capacitance...

Page 8: ...equencer PTT input Low voltage low current entry Fit for open collector control as well For proper use connect it to foot switch or on case digi modes to the computer serial port PTT Output More seque...

Page 9: ...f use for a longer period 2 3 month it would be advisable to keep the PA heated without driving for a few hours 4 6 When the OPR LED is light push on the OPR switch The PA is ready to work Select the...

Page 10: ...ter The PA turns on but no HV is indicated on the Ip bargraph Possible HV circuit fault check the F3 fuse on rear panel HV sampling resistor in power supply damaged HV panel 0 47Ohm 5w No idle current...

Page 11: ...ximity to this amplifier are properly grounded or connected to the protective third wire earth ground If at any time the amplifier shows visible damage has sustained stress emits a foul smell fails to...