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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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