Alpha 8100 Operating Manual page 48


Amplifier turns on but no multimeter indication; other LED bargraphs are operative.
Problem
1) Low voltage power supply problem.
2) Defect or damage on control board.
Amplifier turns on but time delay will not complete; WAIT LED does not turn off.
Problem
1) Defect or damage in timing circuitry on
control board.
Amplifier turns on, time delay completes but amplifier will not transmit.
Problem
1) Open T/R control line from transceiver to
RELAY jack.
Amplifier transmits but red GRID LED illuminates often.
Problem
1) Amplifier overdriven or under-loaded.
2) Load VSWR (reflected power) exceeds 200 W. Check output cabling and antenna. Correct
3) Exciter output poorly controlled.
Amplifier operates but green GRID LED will not light and plate current is low; transceiver
does not seem to be able to drive amplifier to its rated RF output power level.
Problem
1) Input RF load resistor or bias circuitry
damaged.
Correction
Correction
Contact Alpha Customer Service.
Correction
Contact Alpha Customer Service.
Correction
Reduce transceiver output and /or increase
amplifier loading.
impedance mismatches.
Consult exciter's User's Manual for assistance
on controlling output.
Correction
Contact Alpha Customer Service.
ALPHA 8100 OPERATING MANUAL
www.alpharadioproducts.com