RCA 12AH7 12AH7GT VT-207 Vacuum Tubes Hytron Solid Gray but that was the fashion

but that was the fashion back in the 1940s

210 5213 and no provenance/date codes

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

This Hytron JAN-CHY-12SN7GT milspec dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

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

RCA 12AH7 12AH7GT VT-207 Vacuum Tubes Hytron Solid Gray but that was the fashionThis 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