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Classic Currents

Tested Pair of 1962 Western Electric 6140 Tubes Cold Cathode Codes 6239 6252

Tested Pair of 1962 Western Electric 6140 Tubes Cold Cathode Codes 6239 6252

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$28.95 USD
$28.95 USD
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Tested Pair of Western Electric 6140 Cold Cathode Voltage Reference Tubes.
Date Codes 6239 and 6252.

Date Code 6239 places the production to July - September of 1962.
Date Code 6252 places the production to October - December of 1962. 

Both of these voltage regulator tubes test very strong with each having a lovely purple glow.

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:

100 and 100

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