Particulary about theRussian tubes we used to just stick in the 40 year+
tubes and they would work flawless.
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----- Original Message -----
From: Chris Tran GM3WOJ <gm3woj@talk21.com>
To: <amps@contesting.com>
Sent: Saturday, March 17, 2001 3:04 PM
Subject: [AMPS] Changing tubes
>
> Hello all
>
> If you have a 2-tube amplifier and say, 2 spare new tubes,
> is there really any advantage in changing the tube sets
> over every year, or whenever ?
>
> I know that glass tubes need to be used periodically to
> maintain the gettering, and the same probably applies
> to ceramic/metal tubes, but in terms of reliability I can't
> see how changing the tubes regularly would really help.
> I'm assuming that as the tubes age, emission and hence
> RF o/p will slowly fall, but I don't think this should be a
> real problem ?
>
> I guess replacement cost and future availability of tubes
> are considerations.
>
> Visit www.qsl.net/gm3woj/amps1.htm for some photos
> of homebrew amps.
>
> 73
> Chris GM3WOJ
>
>
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>
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