RCA 6SD7 6SD7GT Vacuum Tube NOS NIB

RCA 6SD7 6SD7GT Vacuum Tube NOS NIBThis new old stock, new in box RCA 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

THIS IS NOT AMAZON

Transconductance measured micromhos with a plate current draw of milliamps

side D-getters and excellent flashing

WE MAYHAVE IT

32 and 36 where minimum (65%) is 25

These eight US-made new old stock

a silkscreened base

black plates and beautiful flashing

BUT THAT DEPENDS ON THE LUCK OF THE DRAW

Tube One measured 95%/93% and 95%/94% for Tube Two

This NOS-TESTING matched pair of Sylvania 6BG6G output tubes was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

a round mica spacers and gray plates