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|  TM 11-5820-670-30
2-28. RF AMPLIFIER ASSEMBLY A6500 ALINEMENT. (CONT)
1. Place the TRANSMIT switch on test set to ON position.
2. Adjust C6512 for minimum dc current as monitored at TP101 (+) and TP102 (-) on test set.
3. Adjust C6504 for maximum power output.
CAUTION
When adjusting the variable inductors in the following steps, be careful not to overadjust
as small tuning cores may drop through bottom of inductor.
4. Set frequency selectors on control unit to 53.00 MHz.
5. Adjust L6510 for minimum dc currents as monitored at TP101 (+) and TP102 (-) on test set.
6. Adjust L6503 for maximum power output.
7. Set frequency selectors on control unit to 75.90 MHz.
8. Adjust L6511 for minimum dc current as monitored on power supply current meter.
9. Adjust L6505 for maximum power output.
10. Check to ensure following output levels can be obtained at specified frequencies.
OUTPUT
FREQUENCY
15 watts
75.90 MHz
18 watts
65.00 MHz
18 watts
53.00 MHz
11.
Observe that dc input current does not exceed 2.5 amperes for 15 watts output at 53,65,
and 75.90 MHz.
12. Set frequency selectors on control unit to 42.00 MHz.
13. Adjust variable capacitor C6514 for minimum dc current as monitored on power supply current
meter.
14. Adjust variable capacitor C6511 for maximum power output.
15. Set frequency selectors on control unit to 30.00 MHz.
16. Adjust variable capacitor C6514 for minimum dc current as monitored on power supply current
meter.
17. Set frequency selectors on control unit to 52.90 MHz.
18. Adjust variable capacitor C6514 for minimum dc current as monitored on power supply current
meter.
19. Set frequency selectors on control unit to 52.90 MHz.
20. Adjust L6512 for minimum dc current as monitored on power supply current meter.
21. Adjust L6508 for maximum power output.
22. Check to ensure following output levels can be obtained at the specified frequencies.
FREQUENCY
OUTPUT
52.90 MHz
18 watts
42.00 MHz
18 watts
16 watts
30.00 MHz
2-129
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