[Amps] Help please: Converted Alpha 78 blowing fuses

[Paul Christensen]

Mike,

Good hunting so far.  While you're in there, can you check the PS caps for leakage on a cap analyzer?  

Since you've isolated the problem area external to the RF cage, I would first look very closely at the blue-colored silicon wire at K3. That lead connects from the HV select relay to the transformer.  The blue lead will have elevated voltage for the SSB position. 

Apart from that, it will take a bit more effort in the PS section on CB-1.  

Probably others on the list will have suggestions to augment these suggestions. 

Paul, W9AC

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