Matched Pair Sylvania 6V6 6V6GT/G Vacuum Tubes Silver And Gray NOS-Testing

Matched Pair Sylvania 6V6 6V6GT/G Vacuum Tubes Silver And Gray NOS-TestingThis new old stock testing matched pair of Sylvania silver and gray 6V6GT G 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 30. 1 milliamps with a transconductance of 2640 micromhos while Tube Two measured 30. 7 2900. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300

A 8 or so out of ten

22 and 24 on our Paul Hart-calibrated TV7/U where minimum (65%) is 23 according to a Japanese TV7 supplement

All were made by Sylvania although one is labeled "Philco

I have played it in my Schiit Audio Vali 2 headphone amplifier and it sounded great

This is a new old stock

They have 1-43 188-5 and 3-52 188-5 date/provenance codes

This GE 12BE6 tube -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

new in box 12SC7s tested to spec on our Paul Hart-calibrated TV7/U

side-D getter

This new old stock-testing matched pair of 1960s vintage Sylvania Fat Boy EL34 / 6CA7 tubes was tested on our Maxi-Matcher 2 tube tester with 400 volts on the plates and a bias of -36 volts on the grids for shorts

This quad of RCA 12L6GT tubes was tested on our Paul Hart-calibrated TV7/U or shorts

These tubes have crenelated mica spacers