1961 Amperex 12AX7 ECC83 (12AX7A) Tube - Hickok TV7B tests @ 38/44, min: 32/32

One tube,circa 1961, Holland made by Heerlen Amperex . type 12AX7 / ECC83 vacuum tube. (Triode#1 / Triode#2). Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester.

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