RCA 12AH7 12AH7GT VT-207 Vacuum Tubes Hytron Solid Gray Transconductance measured 3100 micromhos for

Transconductance measured 3100 micromhos for Tube One with a current draw of 27

Tube One measured 50/50 while Tube Two measured 49/54 where minimum (65%) is 25/25 and 100% is 38

This new old stock-testing Svetlana 6550C / 6P27 perforated plate output tube was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -48 volts for shorts

These two industrial-grade 7061 / 12AB5 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box GE 25Z5 tube tested to spec on our Paul Hart-calibrated TV7/U

RCA 12AH7 12AH7GT VT-207 Vacuum Tubes Hytron Solid Gray Transconductance measured 3100 micromhos forThis RCA 12AH7GT VT 207 tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 64 68 where minimum (65%) is 50 50 and 100% is 77 77. 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