4 Tung-Sol 6K6 6K6GT Vacuum Tubes Valves Black Glass Lot Of Four NOS-Testing February 13 2024 It measured an almost-perfectly-balanced 71/72

It measured an almost-perfectly-balanced 71/72 where minimum (65%) is 56/56 and 100% is 86/86

The pressing is quite-quiet with little surface noise and only the occasional pop and tick

low-noise tube

copper support rods and nice flashing

PLEASE INSURE THEM

4 Tung-Sol 6K6 6K6GT Vacuum Tubes Valves Black Glass Lot Of Four NOS-Testing February 13 2024 It measured an almost-perfectly-balanced 71/72This new old stock testing lot of six Tung Sol black 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: 31. 8 milliamps' plate current 2170 micromhos; Tube Two: 35. 1 1980; Tube Three: 40 2120 and Tube Four: 42. 1 2260. New nominal