(1) Tested Ken Rad 7X7 Tube.

Date Code 748.

The 188 EIA code indicates that this tube was made by GE for Ken Rad.

The wording is faded and worn but still legible.

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

Test Result = 1250 micromhos

Minimum pass/good = 630

Both diode sections test at 1175-1200 where 800-800 is minimum pass/good.

~ Please view all 4 photos ~

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