4 Sylvania 6U7 6U7G Vacuum Tubes Lot Of Four The Social Animal This pressing has very light

This pressing has very light surface noise

This new old stock-testing Van Dyke Type 22 X 222 X-223 was tested on our Paul Hart-calibrated TV7 For shorts

copiously-illustrated book is in excellent condition

This trio of US-made 6CM7 tubes was tested on our Paul Hart-calibrated TV7 for shorts

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

4 Sylvania 6U7 6U7G Vacuum Tubes Lot Of Four The Social Animal This pressing has very lightThese 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