‘Clear-Top’ type 12AU7A / ECC82 vacuum tubes. Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. One matched PAIR, circa 1969+/-, U.S.A made by RCA . Tube#1 97 / 91.
‘Clear-Top’ type 12AU7A / ECC82 vacuum tubes. Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. One matched PAIR, circa 1969+/-, U.S.A made by RCA . Tube#1 97 / 91.