Well used pair of grey glass, early 50's.

Test fair - good for gm 1800/2600 & 2200/2650 where good is 1640 in a calibrated Hickok 539-B.

Test fine for gain at 18.8/19.9 & 21.7/22.0 (nominal is 19)

Listening tested for excessive noise & microphonics in a Maxi-preamp 2.

All tubes are guaranteed good or may be returned.  

Shipping includes insurance.

Please see our other items for more vintage tubes & audio.

We combine orders for shipping.

We do not change values for customs.  

Thank You.