"Chuck Harris" wrote in
message ...
I have checked all of my RCA handbooks, and they
only list the 6SN7GT.

If there were true metal 6SN7's, RCA didn't want to
talk about them. They must have been made by someone
else.

Red RCA tubes were from RCA's industrial tube line. They
were supposedly higher quality than the usual faire.

-Chuck

COLIN LAMB wrote:
I had a few hundred 6SN7 tube pulls. A few years ago, I
went through the entire box looking for a metal 6SN7, for
the visual effect in a homebrew regen. I could not find
any. I thought I recalled seeing one, too.

Sadly, this may be the first positive proof that the
memories of all the old timers are collectively failing
at the same time.

Not too long ago, I built a regen using a 6SJ7. I knew I
had a red RCA somewhere and looked and looked to no
avail. Finally, when I was looking for something else, I
came upon the red one. Sure looks pretty.

73, Colin K7FM
The RCA Red tubes were 50,000 hour industrial versions.
I remember these being from the late 1950's and 1960's.


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Richard Knoppow
Los Angeles, CA, USA




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