[Amps] help with corona discharge

[Gary Smith]

I personally miss the tube glow from the first amp I built. It had 
that beautiful 4PR1000A with 6KV on the plate. 

That glow was a thing of beauty.

Gary
KA1J

> Every Commander amp that I have added QSK and vacuum relays to has had
> the blue glow when looking through the cooling fins..
> 
> The three holer on my desk, with brand new 3cpx800 tubes, glows blue. 
> The ten year old 3cx800 tubes also glow blue.
> 
> The tubes are full output, and there is no issue.  I believe the glow
> which appears when cut off bias is removed, may be dependant upon the
> trace elements in the ceramic, with different types of ceramic
> producing somewhat different colors.
> 
> Your amp is fine, you don't need to worry, just operate.
> 
> 73,
> 
> Mike
> W2AJI