Tung-Sol 6SD7 6SD7GT Vacuum Tube NOS NIB A M Records Its diodes measured 57 and

Its diodes measured 57 and 54

I wish I could tell you how they sound and from what I can suss out

These four Super Silvertone 12A8GT tubes were tested for shorts

These tubes have gray plates and nice flashing

These six US-made 5U8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tung-Sol 6SD7 6SD7GT Vacuum Tube NOS NIB A M Records Its diodes measured 57 andThis new old stock, new in box Tung Sol 6SD7GT pentode tested to spec on our Paul Hart calibrated TV7 U. I am playing it my Musical Paradise MC 3 single ended integrated amplifier as I write with Aimee Mann's seminal "Magnolia" album and it sounds terrific. This tube has great bass and sparkling highs and Mann's voice is warm and clear as a bell. It is a bit microphonic, but this was no issue with the amp at full volume and when actuating the amp's