Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass PCL805 Nonal These seven Sylvania-made 3CB6 tubes

These seven Sylvania-made 3CB6 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 1320 micromhos and it drew 63 milliamps' plate current

This lot of five Toshiba-MANUFACTURED 8FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

It measured 96/78

64 and 65 where minimum (65%) is 40

Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass PCL805 Nonal These seven Sylvania-made 3CB6 tubesThis new old stock testing matched pir of GE 6V6GT output tubes was tested on our Maxi Matcher 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 24. 1 milliamps with a transconductance of 2640 micromhos while Tube Two measured 24. 8 2760. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These