6F5 Sylvania metal can NOS 1940's (1.6ma Gm=2000)
$ 7.99
6F5 Sylvania metal can NOS 1940's (1.6ma Gm=2000) (strong single)
5 pins
(6F5 octal base is similar spec-wise to 7B4 loktal, Mu=100)
Zenith 10S669 radio 1941
Zenith 9S369 radio
See more: vacuum tube
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