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Tested Very Strong Matched Pair RCA 12SA7 Tube Date Codes AP & ML Converters

Tested Very Strong Matched Pair RCA 12SA7 Tube Date Codes AP & ML Converters

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$28.95 USD
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Tested Very Strong Matched Pair of RCA 12SA7 Tubes.
Date Codes AP & ML.

Tubes are closely matched for Gm tests (see below).

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

Gm Test = 1050-1075 and 1050-1050 micromhos
Minimum pass/good = 470-470

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