9 Sylvania 6SR7 Vacuum Tubes NOS NIB Lot Of Nine Neutrality During 47 and 48 where minimum

47 and 48 where minimum (65%) is 40

Transconductance measured 35 for Tube One and 36 for Tube Two where minimum (65%) is 25 and 100% is 38

This Amperex World 6AQ8 ECC85 tube was tested on our Paul Hart-calibrated TV7/U for shorts

They have Y5E and 9-22 codes

32 and 36 where minimum (65%) is 25

9 Sylvania 6SR7 Vacuum Tubes NOS NIB Lot Of Nine Neutrality During 47 and 48 where minimumThis lot of nine new old stock, new in box Sylvania Sylvania MANUFACTURED 6SR7 tubes tested to spec on our Paul Hart calibrated TV7 U. The GM LABELED ones all have 312 Sylvania EIA codes. 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