Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing 1st Quarter BW10 They tested (from left to

They tested (from left to right

new in box Sylvania 9JW8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 63/65 and Tube Two measured 66/64 where minimum (65%) is 50/50

It is in pretty good shape with light-to moderate surface noise (pops and ticks) and no scratches

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing 1st Quarter BW10 They tested (from left toThis new old stock testing, perfectly 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 58 for Tube One and 58 for Tube Two where minimum (65%) is 40. They have E5E and E5E 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