Classic Currents

(1) Tested National Union 12SR7 Tube Code MR1U Twin Diode Medium Mu Triode Tube

Name: (1) Tested National Union 12SR7 Tube Code MR1U Twin Diode Medium Mu Triode Tube
Brand: Classic Currents
Price: 7.95 USD
Availability: InStock

(1) Tested National Union 12SR7 Tube Code MR1U Twin Diode Medium Mu Triode Tube

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(1) Tested National Union 12SR7 Tube.

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

Test Result = 2075 micromhos

Minimum pass/good = 1200

Each diode section tests at 1100 and 1325 where 800-800 is minimum pass/good.

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