4 Super Silvertone 12A8 12A8GT Vacuum Tubes Valves Lot Of Four 7172 Tube One has 3225730-3 provenance/date

Tube One has 3225730-3 provenance/date codes

but I would step it up to an 8 or so as this sound striping recording is truly cutting edge

These six gray glass 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

1 % CHANCE THIS MIGHT HAPPEN

new in box and tested to spec on our Paul Hart-calibrated TV7/U

4 Super Silvertone 12A8 12A8GT Vacuum Tubes Valves Lot Of Four 7172 Tube One has 3225730-3 provenance/dateThese four Super Silvertone 12A8GT tubes were tested for shorts, gas and transconductance on our Paul Hart calibrated TV7 U and measured as follows: 32, 32, 36 and 48 where minimum (65%) is 29. 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 FORMS OF SHIPPING EXCEPT