Sylvania 6SF7 Vacuum Tube NOS NIB Scarabus Stereo LP 47 and 54 where minimum

47 and 54 where minimum (65%) is 36 and 100% is 55

This historical recording sounds pretty good

These tubes are the equivalent of the Chinese / Russian 6J1 and 6J2

These two industrial-grade RCA 1851 pentodes were tested on our Paul Hart-calibrated TV7/U for shorts

This RCA 6080 / 6AS7 dual triode output tube was tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania 6SF7 Vacuum Tube NOS NIB Scarabus Stereo LP 47 and 54 where minimumThis Sylvania 6SF7 tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM IS