Matched Pair Sylvania 6K6 6K6GT Vacuum Tubes Silver Tops NOS-Testing 6PPC2 These eight US-made 6BQ6 /

These eight US-made 6BQ6 / 6CU6 tubes tested as follows on our Paul Hart-calibrated TV7/U:

Tube Two Transconductance: 2610

This lot of six Zenith number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

(New US-made 6V6s typically test with plate current from the mid-teens to mid-thirties with transconductance from 2300 micromhos or so

Matched Pair Sylvania 6K6 6K6GT Vacuum Tubes Silver Tops NOS-Testing 6PPC2 These eight US-made 6BQ6 /This new old stock TESTING matched pair of Sylvania silver top 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 1860 micromhos and drew 23. 4 milliamps' plate current. Tube Two measured 1950 23. 5. New nominal is within one standard deviation of 1900. These 6K6s are the best looking, most solidly built 6K6s