[Amps] Thinking out loud 3-500Z and the like gettering with

[Alek Petkovic]

It looks to me like they won't heat the graphite anodes in the modern 
day 3-500Z and similar tubes. They would have to be the metal type 
anodes for the induction heater to work.

73, Alek
VK6APK

On 13/06/2016 9:36 PM, Jim Thomson wrote:
> Date: Fri, 10 Jun 2016 19:53:04 +0000
> From: "Randall, Randy"<Randy.Randall at UCHealth.com>
> To: "amps at contesting.com"<amps at contesting.com>
> Subject: [Amps] Thinking out loud 3-500Z and the like gettering with
> RF?
>
> Thinking out loud 3-500Z and the like gettering with RF?
>
> I have seen on Ebay and Alibaba small to medium RF induction heating boards for sale for not a whole lot of $$.  Has anyone tried to use one of these in a setup with a coil of suitable size to cherry the plates of a 3-500Z or 572B?
> In theory it should work OK and it would be a lot safer than running 500 V or there about and positive grid voltage to cherry the plates.  The tube manufacturers used this setup in production to flash the getters on smaller tubes.   Your thoughts??
>
> Thanks,
> Randy AB9GO
>
> ##  whats wrong with using low B+  voltage...and positive grid V ?   Then you can gets the plate red...with low B+.   You would not have to go as low as  500 V on a  3-500Z either.  1-2 kv would work just fine.
> Just make sure you have lots of air on the tubes.   BTW, just how long do the tubes have to run red...in order to getter them ?
>
> Jim   VE7RF
>
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