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(1) Tested Sylvania 7Y4 Tube Code M6R Loctal Tube Full Rectifier Loktal Tube

(1) Tested Sylvania 7Y4 Tube Code M6R Loctal Tube Full Rectifier Loktal Tube

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$8.95 USD
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(1) Tested Sylvania 7Y4 Loctal Tube.
Date Code M6R.
The wording is partially worn away but still recognizable as being Sylvania branded.

Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts at 1425-1400 where 800-800 is minimum pass/good.

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