7 US-Made 12B4 12B4A Vacuum Tubes Valves Lot Of Seven April 06 2023 Sorry for those of you

Sorry for those of you who need two strong

I am playing it in my Musical Paradise MC-3 single-ended integrated amplifier with Badfinger's seminal "No Dice" album and they sound terrific

(New US-made 6550s typically test with plate current from the low 20s to mid 40s with transconductance from 3500 micromhos or so

new in box matched pair of RCA Clear Top 7AU7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

All tested to spec on our Paul-Hart-calibrated TV7/U

7 US-Made 12B4 12B4A Vacuum Tubes Valves Lot Of Seven April 06 2023 Sorry for those of youThis lot of seven US made 12B4A tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 28, 32, 32, 39, 44, 48 and 51 where minimum (65%) is 32 and 100% is 49. 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