Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass July 10 2025

Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass July 10 2025This matched pair of Ken Rad black glass 6V6GT output tubes was tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 20. 7 milliamps' plate current, 2370 micromhos and 20. 7 2530 for Tube Two. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These tubes have

Tube Two (diodes): 71/53

mesh plates

mesh plate tubes tested 31 and 36 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

two additional

harp-shaped getters and shields between the triodes for reduced cross talk

6 milliamps with a transconductance of 3060 micromhos while Tube Two measured 31

If you need robust EL34s

These eight Philco 7B8 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 29 and 100% is 45:

Tube One tested 54 in Section One and 54 in Section Two as well

but with some wear

It measured 62 where minimum (65%) is 40

This pair of Sylvania-MANUFACTURED 6X5GT rectifier tubes was tested on our Paul Hart-calibrated TV7/U for shorts