As long as both tubes draw similar idle current there shouldnt be any power
hogging.
Ive mixed all sorts of configurations including one or two 4-400A's in amps
that were true GG.
At reduced power you could even use 4-250A's
Carl
----- Original Message -----
From: "Ron Youvan" <ka4inm@gmail.com>
To: "amps" <amps@contesting.com>
Sent: Wednesday, January 23, 2019 8:42 AM
Subject: Re: [Amps] Different versions of 3-500 tubes in amp
On 1/22/19 20:54, Warren KD5YPH Volz wrote:
I've decided one of the two tubes in my SB-220 is weak and I'd like to
get a replacement. Right now both are original Eimac tubes with the
non-graphite anode but I see most replacements are graphite. Will there
be any issue running tubes with different anodes in this amp?
I think the nature of the anodes is of minor interest, but the
difference between the emission of a new tube and an old tube is a
concern. The new tube should hog the current and make you think the
remaining old tube is also bad.
I think another used tube or a pair of new tubes is in order.
--
Ron KA4INM - Youvan's corollary:
Every action results in unwanted side effects.
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