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(!) (Pair 1950's) 7F7 Sylvania round gray plates chrome top 1949-1950 same build (2.1/2.4ma and 2.1/2.0ma)
(!) (Pair 1950's) 7F7 Sylvania round gray plates chrome top 1949-1950 same build (2.1/2.4ma and 2.1/2.0ma)
$ 18.99
1 pair) 7F7 Sylvania round gray plates chrome top 1950's same build
1 tube) 2.1/2.4ma Gm=1400/1500 (1949) branded RCA Victor
1 tube) 2.1/2.0ma Gm=1300/1200 (1950) no printing
Matched on Amplitrex
Good Ma = 2-2.3ma
Good Gm = 1500-1600
- Masco MA-17
See more: vacuum tube
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 (Pair 1950's) 7F7 Sylvania round gray plates chrome top 1949-1950 same build (2.1/2.4ma and 2.1/2.0ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_e6c98bb1-5c1b-4bbd-9455-d8128cebbb00.jpg?v=1746120630){kind=link}
 (Pair 1950's) 7F7 Sylvania round gray plates chrome top 1949-1950 same build (2.1/2.4ma and 2.1/2.0ma) "Pin It")