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One tube, circa 1961, Holland made by Heerlen Amperex,
'Bugle Boy' type 12AX7 / ECC83 vacuum tube
as pictured.

Condition:
New Old Stock / New In Box

Silk-Screening:
please see the photos

Acid Etched Factory/Date Codes:
⊿1A3

Date Code:
1A3

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

*

Hickok TV-7B/U* tested

Test Result(s)

47/48

minimum 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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