Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass 6X4 NOS NIB This Westinghouse 7B4 tube tested

This Westinghouse 7B4 tube tested to spec on our Paul Hart-calibrated TV7/U

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

Transconductance measured 50 for Tube One (RCA Cunningham Radiotron

These tubes have copious flashing

well recorded

Matched Pair General Electric GE 6V6 6V6GT Vacuum Tubes Black Glass 6X4 NOS NIB This Westinghouse 7B4 tube testedThis 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