6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six Gebraucht RCA 6U7 It measured 48 where minimum

It measured 48 where minimum (65%) is 36 and 100% is 55

It has double

These matched pair of Philco 24 globe

It has sutured tops

Both tubes measured 72 where minimum (65%) is 55 and 100% 85

6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six Gebraucht RCA 6U7 It measured 48 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