Matched Pair RCA 5763 Vacuum Tubes Sylvania 12AV7 new in box US-made 12K7GT

new in box US-made 12K7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 1AC5 tube -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

I have listened to all four LPs

(New US-made 6V6s typically test with plate current from the mid-teens to mid 30s with transconductance from 2300 micromhos or so

5 amps for their filaments as compared to

Matched Pair RCA 5763 Vacuum Tubes Sylvania 12AV7 new in box US-made 12K7GTThis perfectly matched pair of RCA gray plate 5763 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 44 and 44 where minimum (65%) is 35. These tubes have gray plates and nice flashing. 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