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(1) Tested Ken-Rad 12K8 Tube Date Code K5-R GE EIA Triode Hexode Converter Tube

(1) Tested Ken-Rad 12K8 Tube Date Code K5-R GE EIA Triode Hexode Converter Tube

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(1) Tested Ken-Rad 12K8 Tube.
Date Code K5-R.
The 188 EIA code indicates that this tube was made by GE for Ken-Rad

The wording is slightly faded but still legible.

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

Gm Test = 1300-2675 micromhos
Minimum pass/good = 630-1500

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