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.

We combine orders for shipping.

We don't change values for customs.  

Thank You.