OM POWER OM2500 A-F, Инструкция по эксплуатации

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21
1. Set the multimeter switch to the HV position
2. Set the OPR/STBY switch to the STBY position
3. Press the ON button
The amplifier is prepared for operation with the following automatic steps:

Toroidal transformers are switched on step by step.

The cooling blower for the final tube is switched on.

The multi-meter bar graph measures the high voltage; the normal value is 3.2 kV

The WAIT LED lights up
CAUTION
After switching on, please confirm that the blower is operating properly. Air must be
flowing from the ventilating aperture above the tube. If there is any concern, or no air
flow, press the “OFF” button immediately!
Heating of the tube takes about
150 seconds . After this time the WAIT LED goes out and the
amplifier is ready for operation.
Enter
TUNE mode. Depending on the input power level and antenna parameters, two
situations can occur. First , when your antenna parameters are close to real 50 Ohms, and
input power not exceeds allowed maximum, PA stay in OPR mode and you will see the
output power. You have to do just little adjustment (steps 8, 9, 12, 13) to get maximum output
power.
Second , if your antenna parameters are not very good and input power is higher than
15watts, safety devices will switch PA automatically to STBY. In such a case start with step
4, go thru all next steps.
4. Reduce the power output of your transceiver to the minimum!
5. Switch OPR/STBY to OPR position (OPR LED lights up)
6. Choose the TUNE position of multimeter
7. Transmit and increase driver power to cca 10W
CAUTION
If the input power is higher than 15W and the power amplifier is not correctly tuned,
the safety devices will switch to STBY. The amplifier will automatically reset and switch
back to OPR mode after approximately 2 seconds. Meanwhile, reduce the input power.
8. Set TUNE knob in such a way, that the TUNE-LED lights up maximum left
(multimeter in TUNE position).
9. Set LOAD knob in such a way, that the TUNE LED on the TUNE scale lights up
under the “
V
” sign. If it is possible to obtain the LOAD in 2 positions, set the position
that is further to the right
10. Repeat tuning several times according to 8 and 9, output power should be abt. 300W
11. Increase the input power until an output power of approximately 1500 W is reached
12. Repeat steps 8 and 9
13. Set TUNE knob to maximum output power (RF POWER LED lights up max. right)