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(1) Tested Zenith 6KT8 Tube and Box Red Letters Code 74-22 GE EIA Triode Pentode

(1) Tested Zenith 6KT8 Tube and Box Red Letters Code 74-22 GE EIA Triode Pentode

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(1) Tested Zenith 6KT8 Tube with Original Box.
Red Letters. Date Code 74-22.
The 188 EIA code indicates that this tube was made by GE for Zenith.

This tube tests as NOS.

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

Gm Test = 5500-1400 micromhos
Minimum pass/good = 3500-650
Average NOS rating = 5250-975

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