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(1) Tested Ken Rad 12SF5 Tube with Original Box Date Code 743 Triode Vacuum Tube

(1) Tested Ken Rad 12SF5 Tube with Original Box Date Code 743 Triode Vacuum Tube

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(1) Tested Ken Rad 12SF5 Tube with Original Box.
Date Code 743.
The 188 EIA code indicates that this tube was made by GE for Ken-Rad.

The box shows some areas of scuffing and has one missing inner flap.

This tube tests as NOS.

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

Gm Test = 1625 micromhos
Minimum pass/good = 950
NOS rating = 1425

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