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Re: [Amps] Amps] SB-220 update & gettering

To: Rob Atkinson <>, J Lyles <>
Subject: Re: [Amps] Amps] SB-220 update & gettering
From: John Lyles <>
Date: Sat, 26 Nov 2016 10:53:05 -0700
List-post: <">>
Attached is a very authoritative paper from RCAm in AIEE in 1935, although very old, the designs have not changed much. The technology hasn't changed much since then. Most modern Tantalum or Moly plates do run with a lot of color in their typical full power state, but no so true with graphite. It is mechanically very stable comparatively, although it requires a lot of vacuum processing before it is very useful.

Some of the anode materials do function as a getter to desorb other stray ions when heated. Graphite is not one of them, although it certainly does outgass residual molecules if it is running hotter.
John L.

On 11/26/16 10:34 AM, Rob Atkinson wrote:
I disagree.  The internal graphite anode tubes must have color to
de-gas and stay gettered.


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