Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers RCA Black Plate Transconductance measured 2000/1900 micromhos for

Transconductance measured 2000/1900 micromhos for Tube One and 2000/2000 micromhos for Tube Two

66 and 68 where minimum (65%) is 45

The Bottlehead calls for a 12AU7 which is a pretty-different tube

new in box Philco 10DE7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This tube comes in a box typically seen for large corporate tube users wherein various

Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers RCA Black Plate Transconductance measured 2000/1900 micromhos forThis matched pair of Sylvania 6X5GT rectifier tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas. They measured 55 55 and 57 52 where minimum (65%) is 40 40 and 100% is 62 62. They have black plates; dimpled, foil getters and rectangular top and bottom spacers. 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"