Matched Pair RCA 6V6 6V6GT Gray Glass Vacuum Tubes NOS-Testing Quartets Opus 18 perfectly-matched pair of Ken-Rad 6SJ7s

perfectly-matched pair of Ken-Rad 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

where minimum (65%) is 50/50 and 100% is 77/77

new in box GE 21LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

is pretty well balanced from triode to triode

These nine RCA 17BE3 / 17BZ3 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 6V6 6V6GT Gray Glass Vacuum Tubes NOS-Testing Quartets Opus 18 perfectly-matched pair of Ken-Rad 6SJ7sThis new old stock TESTING matched pair of RCA gray glass 6V6GT output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance. There were no shorts or gas. Plate current measured 25. 3 milliamps and transconductance was 2650 micromhos for Tube One. Tube Two measured 26. 4 2590. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) They have tall bases;