Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing SRM 1-652 It comes with a nice

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

Date Codes: 1-43 and NK

Twenty-four years ago

respectively where minimum (65%) is 57/57 and 100% is 88/88

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing SRM 1-652 It comes with a niceThis 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