311CH Cetron NOS in original box 1979 (100ma) (311CH is sub for 211H)
$ 399.99
1 tube) 311CH Cetron NOS in original box, good getter 1979
100ma
Gm=3800
(RF Heating HF triode, top cap plate connection, equivalent to 211H)
(4-pin bayonet base like 211)
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