Description
Two, National Union 6SN7GT tubes. White printed logo bases, smoked glass, black, staggered flat plates. Outstanding sonics. Tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure- test at 3000-3000 and 2875-2875 where pass/fail is 1625 micromho. They have the same structure inside and out, having date codes of "5228" and "5213", the 28th and 13th week of 1952. Many other lots of tubes for sale this week. Shipping is free within the continental US. Elsewhere- exact postage only, no packing feee