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(1) Tested Delco 12K5 Tube Date Code 67-17 Delco 12K5 Power Tetrode Vacuum Tube

(1) Tested Delco 12K5 Tube Date Code 67-17 Delco 12K5 Power Tetrode Vacuum Tube

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(1) Tested Delco (General Motors) 12K5 Tube.
Date Code 67-17.
The 274 EIA code indicates that this tube was made by RCA for Delco.

The wording is partially worn away but still recognizable as being Delco branded.

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

Gm Test = 3500 micromhos
Minimum pass/good = 1900

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