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(1) Tested Unbranded 31JS6A Tube 31JS6 A Beam Power Vacuum Tube

(1) Tested Unbranded 31JS6A Tube 31JS6 A Beam Power Vacuum Tube

Tested and Guaranteed

$22.95 USD
$22.95 USD
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(1) Tested Unbranded 31JS6A Tube.
Manufacturer unknown.

Tested on a calibrated Knight KG-600B tube tester with no shorts and no leaks where 50 is minimum pass/good with the following results:

Unbranded 31JS6A = 86

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