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Classic Currents

(1) Tested Philco 7A8 Tube Code 09 Philco Loctal Tube Loktal Octode Converter

(1) Tested Philco 7A8 Tube Code 09 Philco Loctal Tube Loktal Octode Converter

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(1) Tested Philco 7A8 Tube.
Date Code 09.
This tube tests above NOS ratings.
The tube number on the top of the glass is faded.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:

Gm Test = 1000-575 micromhos
Minimum pass/good = 630-315
Average NOS ratings = 945-475

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