6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six 8FQ7 RC2 These three Ken-Rad 1A7GT tubes

These three Ken-Rad 1A7GT tubes tested to spec on our Paul Hart-calibrated TV-7/U

64 and 70 where minimum (65%) is 49

And though this tube tests two standard deviations from the mean

I am playing them with adapters (not included) in one of my Radio Craftsmen RC-2 monoblocks and they sound great

All measured 2100 micromhos where new/nominal is 2000 and minimum (65%) is 1300

6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six 8FQ7 RC2 These three Ken-Rad 1A7GT tubesThis lot of six RCA gray glass 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas and they measured as follows (from left to right, top to bottom): Tube One: 17. 1 milliamps' plate current 1220 micromhos; Tube Two: 19. 6 1810; Tube Three: 20. 9 1440; Tube Four: 23. 6 1720; Tube Five: 25. 2 1410 and Tube Six: 31. 6 1890. New