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Classic Currents

(1) Tested Rad-Tel 6BQ6GA/6CU6 Tube Date Code 5-66 6BQ6 GTB Tube 6CU6 Tube

(1) Tested Rad-Tel 6BQ6GA/6CU6 Tube Date Code 5-66 6BQ6 GTB Tube 6CU6 Tube

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(1) Tested Rad-Tel 6BQ6GA/6CU6 Tube with Original Box.
Date Code 5-66.

The tube is branded as two different types: 6BQ6GTB/6CU6 and 6BQ6GA/6CU6.

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

Gm Test = 4550 micromhos
Minimum pass/good = 2800

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