Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass 6X4 NOS NIB

Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass 6X4 NOS NIBThis 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 21. 3 milliamps with a transconductance of 2700 micromhos while Tube Two measured 22. 1 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 Westinghouse 7B4 tube tested to spec on our Paul Hart-calibrated TV7/U

Their internal structures are all the same

(New 6CG7s typically test from within a half standard deviation of 2600)

a tall bottle

I am playing them played them in one of my Radio Craftsman RC-2 monoblocks and they sound great

new in box Sylvania 3KT6 tube tested to spec on our Paul Hart-calibrated TV7/U

These tubes have copious flashing

They tested 51/52

Setchell-Carlson-BOXED 6GV8 / ECL85 tube tested to spec on our Paul Hart-calibrated TV7/U

well recorded

These six new old stock-testing

Transconductance measured 50 for Tube One (RCA Cunningham Radiotron