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One tube, circa 1961, USA made by Tung-Sol, branded for Monitoradio,
type 12AX7 vacuum tube
as pictured.
As pictured = What you see is what you get !

Acid Etched Designation:
12AX7

EIA/Date Codes:
3226135-3

Tube features 17mm-Gray-Ladder-plates and a top-mounted 'Small Halo-Ring' getter construction.

*

Hickok TV-7B/U* tested

Test Results
Tube#1         52/50                

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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