Date: Fri, 10 Jun 2016 19:53:04 +0000
From: "Randall, Randy" <Randy.Randall@UCHealth.com>
To: "amps@contesting.com" <amps@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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