Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025 They have shoulder / ST

They have shoulder / ST bottles

I am playing it my Bottlehead Crack headphone amplifier as a 12AU7 substitute and it sounds fine

most likely

a third mica spacer for increased vibration resistance and lowered microphonics

dark gray rounded plates and outstanding flashing

Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025 They have shoulder / STThis 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 14. 5 milliamps' plate current, 1960 micromhos and 15. 3 2310 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