[Amps] ALPHA 9500 Question (Fault 21)

Bill Turner dezrat at outlook.com
Mon Oct 31 11:38:13 EDT 2016


------------ ORIGINAL MESSAGE ------------(may be snipped)

On Fri, 28 Oct 2016 15:46:16 -0700, David wrote:

>
>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. 

REPLY:

I had a 9500 where the tube arced and blew out the 40 VDC supply. Your
tube may not be shorted now but I suspect it arced at one time. 

Fortunately my 9500 was under warranty and Alpha repaired it at no
charge, not even for shipping. 

73, Bill W6WRT


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