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One tube, circa 1966, Holland made by Heerlen Amperex,
'Bugle Boy' type 12AX7 / ECC83 vacuum tube
as pictured.

Condition:
Nice

Silk-Screening:
please see photos

Acid Etched Factory/Date Codes:
⊿6F3

Date Code:
6F3

Tube features 14mm-gray-ribbed plates and a 'Small-Halo-Ring' getter on top.

*

Hickok TV-7B/U* tested

Test Result(s)

62/56

minimum (65% of New) recommended for a good tube
32 / 32

(Triode#1 / Triode#2)

*Hickok TV-7B/U is a mutual conductance(Gm) type tube tester. It does check for mutual conductance which is a more accurate measure of tube's age.

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