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(1) Tested 1955 Sylvania 6W6GT Tube with Box Date Code BL Beam Pentode Tube (a)

(1) Tested 1955 Sylvania 6W6GT Tube with Box Date Code BL Beam Pentode Tube (a)

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(1) Tested 1955 Sylvania 6W6GT Tube with Original Box.
Date Code BL (November, 1955).

The tube number is worn off of the glass.

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

Gm Test = 8625 micromhos
Minimum pass/good = 5650

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