Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025

Matched Pair Ken-Rad 6V6 6V6GT 6P6 6P6P Vacuum Tubes Black Glass October 09 2025This 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

great bass and sparkling highs and the alto sax cut through the air without a hint of stridency

almost-perfectly-matched pair of Sylvania-MANUFACTURED 6BL7GTA dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

most likely

GM-Delco-BRANDED 6AX8 tubes tested to spec on our Paul Hart-calibrated TV7/U

a third mica spacer for increased vibration resistance and lowered microphonics

This new old stock-testing matched quad of Sylvania 7A7 tubes was tested on our Hickok 800 and all measured 1900 micromhos where new/nominal is 2000 and minimum (65%) is 1300

They have shoulder / ST bottles

new in box RCA 12Z3 tubes tested to spec on our Paul Hart-calibrated TV7/U

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

Picture Three) and 2500 for Tube Two (Cracked base

dark gray rounded plates and outstanding flashing

These tubes have four-hole