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6CM7 RCA black plates NOS 1956 (4.3ma and 22ma) (rare)

6CM7 RCA black plates NOS 1956 (4.3ma and 22ma) (rare)

$ 14.99

6CM7 RCA black plates "U" getter NOS 1956

4.3ma Gm=2000

22ma Gm=4900

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