Two, new in box, RCA 6SN7GTB tubes. Red-orange printed logo bases, black, flat plates, tall bottle, lower D-getter. Outstanding sonics. The 6SN7GTB can be used in applications also calling for the 6SN7GTA and 6SN7GT. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure- test at 3500-3500 and 3500-3438 where pass/fail is 1625 micromho.  They have the same structure inside and out, having matching date codes of "AR", July 1965.

Many other lots of tubes for sale this week.

Shipping is free within the continental US. Elsewhere- exact postage only, no packing feee