Matched Pair RCA Black Plate 5763 Vacuum Tubes Globe Bottle Pental Transconductance measured 48 for Tube

Transconductance measured 48 for Tube One and 50 for Tube Two where minimum (65%) is 40 and 100% is 62

rectangular mica and smooth rectangular bottom spacers and excellent flashing

This matched pair of Amperex 6BL8 pentode/triode tubes was tested on our Paul Hart-calibrated TV7/U for shorts

(Transconductance: / where the TV7/U minimum (65%) is 56/56

new in box 12FM6 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA Black Plate 5763 Vacuum Tubes Globe Bottle Pental Transconductance measured 48 for TubeThis matched pair of RCA black 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 48 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 YOU DO