6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six 8FQ7 RC2 64 and 70 where minimum

64 and 70 where minimum (65%) is 49

gray plates and an anode radiator for cooler operation and longer life

47/43 and 49/50

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

new in box RCA 8AR11 tube tested to spec on our Hickok 800 tube tester

6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six 8FQ7 RC2 64 and 70 where minimumThis 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