Ah, yes! That much I'm familiar with. For example, the older 3-500z anodes had
zirconium on their exterior surface that acts as a getter when it's hot enough
(glowing red). W8JI's pages are excellent.
Kim N5OP
On Mar 16, 2012, at 5:11, carboyhat@juno.com wrote:
> Kim, Check out W8JI.com and go down to vacuum tubes in amplifiers
> article. He gets into the topic of
> activating the 'getter' in tubes to remove oxygen.
>
> Bob, AA4AI, Watkinsville GA
> -------------------------------------------------------------------------
> -------------------------------------------------------
> On Thu, 15 Mar 2012 12:54:36 -0700 (PDT) Kimberly Elmore
> <cw_de_n5op@sbcglobal.net> writes:
>> I've heard all sorts of variations on "burn-in." Is the appropriate
>> burn-in
>> different for thoriated tungsten cathodes vs. oxide cathodes? What's
>> an
>> authoritative recommendation?
>>
>> Kim N5OP
>>
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