Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Virginia new in box RCA 5AM8

new in box RCA 5AM8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This perfectly-matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Miller 12-H6 KC output transformer with diode filter is sold as-is as I have no means of testing this output transformer

Please rely on the pictures as to the true content of these albums as my Russian is worse than poor

6 dB / -82

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Virginia new in box RCA 5AM8This new old stock testing, nicely matched pair of Ken Rad 6SJ7s was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 58 for Tube One and 60 for Tube Two where minimum (65%) is 40. They have G 5R and G SR date codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. They are microphonic and are fine in the preamp