[Amps] ALPHA 9500 Question (Fault 21)

[David B. Ritchie]

Hello -

I am getting Fault 21 on my Alpha 9500.  The Fault Decoder Sheet from their
website says it has to do with the Cathode +40V bias PS.  It suggests that
it might be a shorted tube.  The tube is not shorted.  I have checked it
(Chinese) and the replacement (new Eimac) I tried and neither is shorted and
both cause the amp to behave in the same manner:

ON/OFF Switch DEPRESS - ON/OFF Light comes ON

ON Switch DEPRESS - brief turn on, fans, lights, Cath PS starts up, ON light
comes ON - then the "ON" light goes out (ON/OFF Light still ON) and
everything shuts down.

The Alpha Remote Software appears completely operative at all times (and is
how I read the Cath PS)

No joy in contacting the new Alpha

Any ideas would be appreciated.

Thanks!

David W6DR

W6DR at ARRL.NET

 

 

 



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