(sold out) KTZ63=6J7G Marconi UK NOS 1940's - 1950's
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0 pair) KTZ63=6J7G Marconi UK NOS
0 tube) 2.1ma Gm=1300 slightly taller
0 tube) 2.1ma Gm=1300
(also see 1620 which is a low noise 6J7)
- Western Electric 124C amp, 91A clone
See more: vacuum tube
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 KTZ63=6J7G Marconi UK NOS 1940's - 1950's "Pin It")