Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Choral Stereo LP Tube One measured 61/60 while

Tube One measured 61/60 while Tube Two measured 68/68 where minimum (65%) is 50/50 and 100% is 77/77

SOME COUNTRIES DO NOT HAVE INTERNAL TRACKING

new in box Telefunken PL82 tube tested to spec on our Paul Hart-calibrated TV7/U

I played them in my Alan Eaton single-ended 45 amplifier (as an "excellent" 6SN7 substitute according to Antique Electronic Supply's "Tube Substitution Guidebook") and they sound outstanding

It is a strange bird with well over an inch of space above the top mica spacer

Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass NOS-Testing Choral Stereo LP Tube One measured 61/60 whileThis new old stock testing matched pair of Ken Rad MANUFACTURED, OEM BRANDED black glass 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts. Tube One drew 33 milliamps' plate current while Tube Two drew 34. Transconductance was 1710 for Tube One and 1960 for Tube Two where new nominal is within one standard deviation of 1900. As I write, I am playing them in my Mini Mite 2013 and they sound