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(1) Tested Zenith 6KA8 Tube Date Code 72-17 Great Britain Triode Pentode Tube

(1) Tested Zenith 6KA8 Tube Date Code 72-17 Great Britain Triode Pentode Tube

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(1) Tested Zenith 6KA8 Tube.
Date Code 72-17. Made in Great Britain.
The 188 EIA code indicates that this tube was made by GE for Zenith.

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

Gm Test = 1325-900 micromhos
Minimum pass/good = 950-625

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