Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes Valves NOS-Testing

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes Valves NOS-TestingThis 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

Sold as-is until I find a setting

Three are milspec

Tube One measured 54 while Tube Two also measured 54

It drew 27

new in box Mullard-MANUFACTURED

giving you not only a different sonic signature because of that characteristic

TUBES ARE GUARANTEED GOOD ON SHIPMENT

These eight US-made 6BQ6 / 6CU6 tubes tested as follows on our Paul Hart-calibrated TV7/U:

new in box GE 6AC7 tubes tested to spec on our Paul Hart-calibrated TV7/U

SOMETIMES THERE ARE INITIAL SCANNING DELAYS

These tubes were made in the same factory and come from that cusp in time after the RCA buyout of Cunningham

I have played it in one of my Radio Craftsmen RC-2 monoblocks (with an adapter