Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Virginia new in box Brimar 6AM6

new in box Brimar 6AM6 / EF91 tubes tested to spec on our Paul Hart-calibrated TV7/U

6 dB / -82

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

is pretty quiet with some pops and ticks

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Virginia new in box Brimar 6AM6This 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