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(1) Tested RCA 6FY5 EC97 Tube with Box Blackburn Great Britain Code B3A1 Triode

(1) Tested RCA 6FY5 EC97 Tube with Box Blackburn Great Britain Code B3A1 Triode

Tested and Guaranteed

$12.95 USD
$12.95 USD
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(1) Tested RCA 6FY5/EC97 Tube with Original Box.
RCA Date Code BQ. 
Etched Date Code B3A1. Made in Great Britain (Blackburn factory).

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 = 12,625 micromhos
Minimum pass/good = 7250
Average NOS rating = 10,875

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