Hi Warren,
I have had the same problem. My Henry had two Eimac-looking type 3-500s
in it, but one stopped working (that was spectacular all by itself,
actually). So I purchased a new 3-500ZG to get out of a bind, because
it was all that was available to actually get the radio back on the air
for the contest with two days' notice.
Although the ZG and the Eimac-looking one worked fine together, I
realized that my sense of world order was completely thrown off by
having two tubes that didn't look the same, and one of them didn't glow
like the other. I would wake up in the morning lethargic, and wondering
"What is the point?" etc, stuff like that. Probably also had a stuffy
nose. So after the contest I went on the prowl to find a pair of proper
Eimac tubes, found them, and now all is right with the world and I have
a spare ZG with very low hours that I hope to sell to some ham who
doesn't care as much about that sort of thing as I do.
My health has generally improved since changing over to Eimac tubes, but
I am not sure the two events are related.
Mark N5OT
On 1/22/2019 7:54 PM, Warren Volz wrote:
All,
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?
-Warren KD5YPH
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