Tests 2650/2775 for GM where minimum good is 1950 on a calibrated Hickok 539-B.
Listening tested in Maxi-preamp 2 for excessive noise and microphonics.
Quiet, excellent.
All tubes are guaranteed to test good or may be returned for a full refund.
Please see our other items for more vintage tubes & audio.
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We don't change values for customs.
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