4 Sylvania 6U7 6U7G Vacuum Tubes Lot Of Four The Social Animal Transconductance measures the efficiency of

Transconductance measures the efficiency of a tube and also serves as a tube life measurement proxy as tube efficiency diminishes with age

romantic and poignant like it should

This pressing has very light surface noise

anode radiators for cooler operation and longer tube life and O-getters

4 Sylvania 6U7 6U7G Vacuum Tubes Lot Of Four The Social Animal Transconductance measures the efficiency ofThese four Sylvania MANUFACTURED 6U7G tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. They tested (from left to right) as follows: 44, 52, 55 and 55 where minimum (65%) is 40. 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