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*

One tube, circa 1961, U.S.A. made by Sylvania,
type 6AB4 vacuum tube
as pictured.

Condition:
New Old Stock / New In Box

Silk-screening:
Please refer to photo(s)

Acid etched designation (Sylvania's emblem):
6AB4

Date code:
61-15

Tube features black plate and a top-mounted 'rectangular' getter construction.

*

Hickok TV-7B/U* tested

@ 83

min.:  50

*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.

Satisfaction Guaranteed! 

*FantasticTubes !!!