[Amps] 3-500Z blue glow on glass

[Carl]

That sure sounds like gas. You might be able to salvage it by setting up a 
jig and running about 500V and enough positive bias to get the anode red. 
Use plenty of air and let it cook for an hour or so.

Then step the HV to 1000, 1500, etc while adjusting the bias for the same 
anode dissipation and glow.

No guarantees.

Carl
KM1H


----- Original Message ----- 
From: "Tom Prohigh" <tomp at prohigh.com>
To: <amps at contesting.com>
Sent: Friday, July 02, 2010 12:28 PM
Subject: [Amps] 3-500Z blue glow on glass


>I have a tl-922 amp.  One of the 3-500Zs had a blue/purple glow on the 
>glass
> when HV is applied.  The other one has no glow.  I don't think that this 
> is
> a problem as the tubes are not gassy.  I just want to make sure
>
>
>
> Thanks
>
>
>
> Tom - AB3FL
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps