Matched Pair Ken-Rad 6SJ7 Vacuum Tubes

Matched Pair Ken-Rad 6SJ7 Vacuum TubesThis new old stock testing matched pair of Ken Rad 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 55 for Tube One and 60 for Tube Two where minimum (65%) is 40. They have 7 09 188 5 and 630 188 5 date provenance codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. WE HAVE SCORES OF THOUSANDS OF

Their readings are 46

gas and transconductance on our Paul Hart-calibrated TV7/U as well as a Hickok and a Superior

Its diodes measured 14 and 12

but most should work in most circuits

An excellent performance and live recording as well

but not in guitar amps and other environments with loud noise and/or excessive vibration

new in box Sylvania 6V4 / EZ80 rectifier tube tested to spec on Paul Hart-calibrated TV7/U

These two US-made 14A4 tubes tested to spec on our Paul Hart-calibrated TV-7/U

This Japanese 38KD6 tube tested 76 on our Paul Hart-calibrated TV7/U where minimum is 54 and new is 100

new in box Sylvania 14H7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This CD-Rom is in fine shape

These tubes were made in the same factory and come from that cusp in time after the RCA buyout of Cunningham