Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing SRM 1-652 They have Y5E and 9-22

They have Y5E and 9-22 codes

Twenty-four years ago

Transconductance measured 58 for Tube One and 59 for Tube Two where minimum (65%) is 40

new in box matched pair of GE 6FQ7 / 6CG7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

It comes with a nice band and has a 17 jewel AR-18 in-house-made movement which is in excellent shape with no oxidation or water damage

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing SRM 1-652 They have Y5E and 9-22This new old stock TESTING matched pair of Sylvania 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 57 for Tube One and 58 for Tube Two where minimum (65%) is 40. They have HG YCN and EJ date codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. Tube Two is a bit microphonic and it is therefore