5 Ken-Rad 6U7 Vacuum Tubes Valves Lot Of Five Quintet 6K 5 standard deviations of 3600

5 standard deviations of 3600 micromhos and tend to be rather erratic readings-wise like their 12AT7 cousins)

new in box RCA 6DW4B tubes tested to spec on our Paul Hart-calibrated TV7

new in box RCA 13GF7 13GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

2 milliamps and transconductance was 2460 micromhos for Tube One (Raytheon-BRANDED)

5 Ken-Rad 6U7 Vacuum Tubes Valves Lot Of Five Quintet 6K 5 standard deviations of 3600These five Ken Rad MANUFACTURED 6U7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. They tested (from left to right) as follows: 56, 58, 64, 68 and 68 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