1. CHECKING of  the built-in UCU-01 control unit.

Switch on the amplifier and check as follows:


- check the heating time: it must be around 180sec. After 180 sec the RDY yellow LED will sign if the PA is ready to work.

- check the 18V AC voltage btn 4-5 pins of JP4 connector. (here must be18-19V)
- check the following voltages:

  1. +24V on 7. pin of JP4 connector.
  2. +15V on 8. pin of JP4 connector.
  3. +12V on 7.pin of JP3 connector.
  4. +5V on out pin of 7805 stabilizer (the 7805 IC is mounted on side of the separator plate)

- Please push the TMP knob on the front page of the linear and set the P5 "SPEED" poti  - up to actual room temperature (20 degr. two green leds
  will lit)
- Set the STBY/OPR switch on the frontpage to OPR position.
- Check now the voltage on the pin 1. of JP1 connector This is the cathode voltage of the tube, must be >than +40V if the tube receives the anode
   voltage.
- Put shortcut to PTT input of the amplifier: (red RCA jack on the rear panel)
- The sequencer unit (only in the new version PA's from 1st  Jan. 2009) will give out shortcuts on the RCA jacks:

  1. First to the PRE jack, to the preamplifier.
  2. After 50mSec to the PA jack.
  3. After 100mseC to the TCVR jack.

- Set now the correct idle current of the tube as follows:

  1. Connect your voltmeter parallel with the R4 10 Ohm resistor. Set 1.0V with the P6 poti on the resistor. (by Ohm laws you can calculate the current)
    On case 1.0V the idle current will be 100mA. 100mA is enough for the proper AB1 class linear operation.
  2. Check now again the voltage on pin 1 of the JP1. Must be here about  +18-22V it depends of the tube.
  3. Calibrate the IG1 meter: Check the voltage on R3 4.7 Ohm resistance. Calculate the actual Ig1 current with P1 poti.(Ig1)
    ( for Ig1 meter calibration drive the PA up to nominal output power)

 Set finally the P4 poti to close to full right position. (you can set with P4 te sensitivity of OVR operation)

2. Modification on UCU-01 panel.
    D17 supressor diode ( 10V/600W bipolar type BZW06-10B) It will save the input of the Ip meter unit on case of inner HV arc in the tube.
    After any inner arc if no Ip measurment check or change this diode.
    D18 supress diode (64V/600W bipolar type built in parallel with the R1 47K resistor. It will save the Q1,Q7,Q8 transistors on case HV inner arc in 
    the tube.
    Some 80x80mm DC FAN produce undesirable wideband noise in the RX. To fix the problem put a 100nF capacitor parallel with R21 10 Ohm   
    resistor ( near of JP7 connector)
    




 





















3.FUNCTION and voltges of PCB connectors.

JP1. STBY/OPR SWITCH connector

PIN FUNKTION VOLTAGE WIRE COLOR
1 CAThode >40V/RX,~20V/TX Black
2 GND 0 V Brown
3 OPR +15/24V on OPR Red
4 OPR +15/24V on OPR Orange
5 STBY 0 V on STBY Yellow

 JP2. LED funktion line

PIN FUNKTION VOLTAGE WIRE COLOR
1 OVR +8.2V on OVR Black
2 RDY +1.5 RDY on Brown
3 WAIT +8.2V WAIT on Red
4 QRO +1.5 QRO on Orange
5 AIR +1.5 AIR on Yellow

JP3. RLY/PTT out Connector

PIN FUNKTION VOLTAGE WIRE COLOR
1 GND 0 V BLACK
2 GND 0 V BROWN
3 RLY + +15 or +24V RED
4 RLY - max 0.7V on TX ORANGE
5 RLY - max 0.7V on TX YELLOW
6 PTT +15/24V/rx,0V/tx GREEN
7 +12V OUT +12V BLUE
8 +15V IN +15V CYAN

JP4. ACC Connector

PIN FUNKTION VOLTAGE WIRE COLOR
1 FAULT/SWR 0 on RX, +3V fault different
2 +15V out +15V RED
3 +24V +24V RED/ORANGE
4 ~19V ~19V AC GREY
5 ~19V ~19V AC GREY
6 GND GND 0V BLACK
7 FAN - 7.8V on 20Celsius BLACK
8 +15V +15V OUT CYAN
9 THERM DIFF White/red

JP5. IG1 meter output connector

PIN FUNKTION VOLTAGE WIRE COLOR
1 NC. - -
2 IG1 meter out different BROWN
3 NC. NC. RED
4 NC. NC. -
5 NC.    

 

JP6. -B CONNECTOR

PIN FUNKTION VOLTAGE WIRE COLOR
1 HV minus/IP mtr. 0- -10V max different
2 GND GND 0 V BLUE

JP7. TMP meter output.

PIN FUNKTION VOLTAGE WIRE COLOR
1 TMP out 0-1.8V YELLOW
2 GND 0 V -

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