7F7 Sylvania round black plates used/good 1960's (1.9/1.7ma) (Gm like new)
$ 7.99
7F7 Sylvania staggered round black plates used/good 1960's
1.9ma Gm=1600
1.7ma Gm=1400
- Masco MA-17
See more: vacuum tube
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