5 General Electric GE 6SF7 Vacuum Tubes Lot Of Five Type Sextal T18

5 General Electric GE 6SF7 Vacuum Tubes Lot Of Five Type Sextal T18These 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.

It sounds fine with an occasional pop and tick

Transconductance measured (From left to right): 36

IN OVER OVER 7000 SALES

Transconductance was 1370 for Tube One (Admiral-LABELED

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

They tested as follows: 53

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

new in box Sylvania 2A4G tube tested to spec

This matched pair of Sylvania black plate 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

side O getters and excellent flashing

new in box Sylvania 6LU8 tube tested to spec on our Paul Hart-calibrated TV7/U

This trio of Toshiba output tubes was tested on our Maxi-Matcher in Real World Conditions with 400 volts on the plates and a bias of -36 volts for shorts