10 US-Made 6K6 6K6GT Vacuum Tubes Valves Lot Of Ten Silver Tops Black And Silver new in box Matsushita-MANUFACTURED

new in box Matsushita-MANUFACTURED

This Wards type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

These three RCA large logo 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 73/74 while Tube Two measured 78/75 where minimum (65%) is 50/50 and 100% is 77/77

10 US-Made 6K6 6K6GT Vacuum Tubes Valves Lot Of Ten Silver Tops Black And Silver new in box Matsushita-MANUFACTUREDThese ten US made 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: 20. 2 milliamps' plate current 1810 micromhos; Tube Two: 22. 4 1850; Tube Three: 23. 8 1920; Tube Four: 25. 4 1910; Tube Five: 29. 8 2240; Tube Six: 30. 2 1800; Tube Seven: 30. 8