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Mechanics & Electronics ME1200-F, Operating Manual

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Mechanics & Electronics ME1200-F Operating Manual Download Page 4

4

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

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Heat up time checking circuit (3 min)

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

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Temperature dependent ventilating speed control

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Cooling fans (2 pcs)

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Function and status indicator LEDs (6 pcs)

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OPTO coupled PTT switch

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4 LED bargraph in new front page version (FWD, RFL, Ig1, 

Ia,Ua,tmp)

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Built in PS and RF relays

Summary of Contents for ME1200-F

Page 1: ...V U ME750 H F V U ME1200 1500 H F V U LINEAR AMPLIFIERS LED BARGRAPH FRONTPAGE VERSION Mechanics Electronics Inc Hungary Draskovits Gábor HA1YA Szombathely Kárpáti K u 43 H 9700 e mail ha1ya chello hu web http ha1ya config hu M E ...

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: ...on the MIC GAIN 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 protection of the Linear is inactive during STBY mode In case the SWR 1 3 in QRO mode the protection is active the PA can be use only with Antenna Tuner 1 3 The required power supply is...

Page 4: ...time checking circuit 3 min Protection circuits Ia Ig1 temp SWR 3 overdrive Temperature dependent ventilating speed control Cooling fans 2 pcs Function and status indicator LEDs 6 pcs OPTO coupled PTT switch 4 LED bargraph in new front page version FWD RFL Ig1 Ia Ua tmp Built in PS and RF relays ...

Page 5: ...SSB Driving Power 0 30W max Input WSVR max 1 1 5 In Out impedance 50 Ohm Valve s GI46B T R System opto 12V 8mA appr OPEN COLL OK Harmonic supression 50dB at 400W RF out Intermodulation 35dB at 400W RF out Protection Ia 5A Ig1 150mA VSWR 3 Temp 75Co Overdrive 30W Dimension 410X185X300 mm Weight 24kg Mains 230V 10A 50 60 Hz ...

Page 6: ... 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 120 sec 6 WAIT LED Blinking during the heating up period indicating that the heating is in progress Required time is 120 sec when the light goes out and the OPR led lit up 7 QRO LED Indicates the high power mode of the PA Can be activated by the STBY OPR ...

Page 7: ...7 Indicate the Ia current When you push the HV pushbutton indicate the Ua voltage in KV 13 Tune knob Tuning knob of the anode plate capacitor Use for tuning the PA for max output ...

Page 8: ...r the power valves 12 18V 0 3A DC or 230V AC 18W 7 PTT Connection for PTT RCA The relays are closed by earth connection Low voltage low current opto entry Fit for open collector control as well 15V 10mA 24V 10mA on case HF PA s Use a sequencer circuit for long life of coaxial relays 8 INPUT Input connection for the driver TCVR 50 Ohm N connector SO239 on case HF PA s 9 OUTPUT Aerial connection 50 ...

Page 9: ...ithout driving for a few hours 4 6 When the OPR LED is light push on the OPR switch The PA is ready to work 4 7 Using the tuning mode of the TCVR CW give driving power to reach 200 400 mA indication on the Ip bargraph Tune for maximal output power with TUNE knob Increase the driving power until maximum anode current than carry out fine tuning using the TUNE knob You can indicate the reflected powe...

Page 10: ... Fuse in power supply damaged No idle current when you push the PTT about 100 mA on the IP bargraph No Ua voltage Check the protection resistor on side of RF box or fuse on HV PCB 6 8 Ohm 1 25A Check F3 catode fuse of tube in the rear panel The idle current is too low or too high Check the Q1 BD249C transistor and the zener stabilizer unit on UCU 01 PCB you can set the needed value with poti P6 Pl...

Page 11: ...oximity 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 operate satisfactorily it should not be used until its performance has been checked by qualified service personnel Connect a good earth or water pipe ground to the ground post on the rear of the Amp...

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