One tube, circa 1963, Holland made by Heerlen Amperex for Valvo. type ECC83 (12AX7) vacuum tube. (Triode#1 / Triode#2). Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester.
Item Tag: Heerlen Amperex
1963 Amperex/Valvo 12AX7 ECC83 (12AX7A)Tube-Hickok TV7B tests@ 49/50, min: 32/32
One tube, circa 1963, Holland made by Heerlen Amperex for Valvo. type ECC83 (12AX7) vacuum tube. (Triode#1 / Triode#2). Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester.
Related Images:
1963 Amperex/Valvo 12AX7 ECC83 (12AX7A)Tube-Hickok TV7B tests@ 49/50, min: 32/32
One tube, circa 1963, Holland made by Heerlen Amperex for Valvo. type ECC83 (12AX7) vacuum tube. (Triode#1 / Triode#2). Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester.
Related Images:
1963 Amperex/Valvo 12AX7 ECC83 (12AX7A)Tube-Hickok TV7B tests@ 49/50, min: 32/32
One tube, circa 1963, Holland made by Heerlen Amperex for Valvo. type ECC83 (12AX7) vacuum tube. (Triode#1 / Triode#2). Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester.