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(1) Tested Very Strong Amperex 25F5A Tube with Box Code 71-28 Beam Power Tube

(1) Tested Very Strong Amperex 25F5A Tube with Box Code 71-28 Beam Power Tube

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$12.95 USD
$12.95 USD
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(1) Tested Very Strong Amperex 25F5A Tube with Original Box.
Date Code 71-28.
This tube tests well above NOS ratings.

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

Gm Test = 5200 micromhos
Minimum pass/good = 2500
Average NOS rating = 3750

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