5 General Electric GE 6SF7 Vacuum Tubes Lot Of Five Type Sextal T18 Transconductance measured (From left to

Transconductance measured (From left to right): 36

It sounds fine with an occasional pop and tick

It is dead quiet when the preamp is muted and has excellent frequency response and dynamics

new in box US-made 6BJ6 tubes tested to spec on our Paul Hart-calibrated TV7/U

5 General Electric GE 6SF7 Vacuum Tubes Lot Of Five Type Sextal T18 Transconductance measured (From left toThese five GE 6SF7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They tested as follows: 56 32, 66 35, 74 55, 77 52 and 82 48 where minimum (65%) is 50 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.