[Amps] Gettering 3-500 Tubes

[rbethman]

I don't find it a surprise that the Chinese 572Bs are a problem.

Too much from China is very problematic.

I find the Cetron 572Bs and the old U.S. made 813s to be just fine.

If I ever have to replace the Eimac 30500Zs, I'm going to be very 
careful and selective.

Bob - N0DGN

On 11/7/2011 11:46 AM, Carl wrote:
> Chinese 572B's are rarely gettered sufficiently and will arc at 2400V in a
> SB-200 even in standby at times.
>
>   I always getter them before using. OTOH even 1960's era Cetrons are fine.
>
> Carl
> KM1H
>
>
>