[Amps] Question abt YC-156/3CPX5000A7

[Tony King - W4ZT]

Dirty ceramic will certainly cause leakage. Clean it good and try it 
again.  Then if you really want to put it in there, be sure to run the 
bias way up first and ease it down to make sure it idles at the expected 
plate current and bias voltage.  There is plenty of evidence that 
another tube (GS-35B) can require double the expected bias for proper 
idle current yet still perform properly with full output and apparently 
good efficiency.

73, Tony W4ZT


k7rdx wrote:
> Have just finished hipot testing a yc-156...Pulls 15 micro-amps between
> plate and grid at 13kv...Is it risky to pop this in the deck(6kv) and check
> the output or is it likely gassy and might flashover?Dirty ceramic fool the
> hipot?
> Thanks...Jim
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