Four-pin plastic base with tipped S-shaped envelope. Donor card reads: "Triode made by Elman B. Myers in the old Music-Master laboratories in Betzwood, Pa., during the winter of 1926-27. Given to [me] ...
Four-pin plastic base with tipped S-shaped envelope. Donor card reads: "Triode made by Elman B. Myers in the old Music-Master laboratories in Betzwood, Pa., during the winter of 1926-27. Similar in ...
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