6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six Gebraucht RCA 6U7 It has double

It has double

They measured (from left to right) 59

Transconductance measured 44 for Tube One and 46 for Tube Two where minimum (65%) is 40 and 100% is 62

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

It teats below spec but should work fine in many applications

6 RCA 6K6 6K6GT Vacuum Tubes Gray Glass Lot Of Six Gebraucht RCA 6U7 It has doubleThis 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