Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass

Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black GlassThis 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 20. 3 milliamps with a transconductance of 2320 micromhos while Tube Two measured 21. 3 2520. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These

This matched pair of RCA gray plate 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box matched pair of RCA Clear Top 7AU7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

It drew 52

This Sylvania 6DQ6B / 6GW6 tube tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of silver top Sylvania 6V6GT output tubes was tested on our Maxi-Matcher 2 for shorts

80/70 and 82/70

They have shoulder / ST / Coke-bottle bottles and dimpled-sheet getters

They measured 51/49 and 52/49 where minimum (65%) is 40/40 and 100% is 62/62

These tubes were made in the same factory and come from that cusp in time after the RCA buyout of Cunningham

new in box RCA 8ET7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 57 for both tubes where minimum (65%) is 40

Transconductance measured 82 for Tube One (6AU6A) and 84 (6AU6) for Tube Two where minimum (65%) is 58