Matched Pair RCA Victor 6K6 6K6G Vacuum Tubes Gray And Silver Bottles ST Shoulder Style Novar Plate Cap T70

Matched Pair RCA Victor 6K6 6K6G Vacuum Tubes Gray And Silver Bottles ST Shoulder Style Novar Plate Cap T70This matched pair of RCA Victor 6K6G tubes was tested on our Maxi Matcher with real world voltages of 325 volts on the plates and a bias of 36 volts. Tube One drew 21. 3 milliamps' plate current while Tube Two drew 23. 5. Transconductance measured 1630 and 1730 micromhos, respectively, where new nominal is within one standard deviation of 1900. These are beautiful tubes with gray and silver Coke bottle envelopes; anode radiators for cooler operating

It measured 38/39 on our TV7/U where minimum (65%) is 32/32 and 100% is 49/49

This matched pair of Philips Miniwatt PCL82 / 16A8 triode-pentodes s was tested on our Paul Hart-calibrated TV7 for shorts

transconductance and gas

black plate

This Raytheon 30KD6 tube tested to spec on our Paul Hart-calibrated TV7/U

hanging filaments

new in box Sylvania 12BK5 tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured 64 where minimum is 40 and new is 74

8 milliamps' plate current and measured 2060 micromhos

but this tube is different enough that it does sound good

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

a mesh plate