Alpha Power 99 - Troubleshooting Hints; Amplifier Will Not Turn On; No HV Indicated; No Multimeter Indications

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Troubleshooting Hints
*NOTE: FCC rules do not permit new amateur amplifiers to be operable on 24-30
MHz as delivered within the US and possessions. As shipped to a US address, the
amplifier is not operable on 21 MHz and above. Owners who send Alpha Power
Customer Support a photocopy of their authorizing amateur license will promptly be
provided information on “unlocking” 12 and 10 meter coverage.
99 will not turn on; nothing happens when ON switch is pushed.
1) External AC wiring, fuse or circuit breaker may be open.
2) Amplifier cover not in place; cover safety interlock open.
3) Fuse F1-F4 open or missing; check fuses with an ohmmeter.
4) Step-start resistor R4 or R5 open.
Amplifier turns on but no HV is indicated by the multimeter LED bargraph.
1) Multimeter selector switch in wrong position, e.g., Ip.
2) Possible HV circuit fault.
3) HV sampling resistor in power supply damaged.
4) Transformer plugged into power supply incorrectly.
Amplifier turns on but no multimeter indications; other LED bargraphs are
operative.
Radio Alpha Products Inc. ® Alpha 99
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