Matched Pair RCA 6CL6 Vacuum Tubes Black Bottle new in box International Servicemaster

new in box International Servicemaster 6CG8A tube tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 67/26 while Tube Two measured 67/28 where minimum (65%) is 58/23

They were dead quiet when the preamp was muted and had excellent frequency response

This tube has shiny black plates

new in box Sylvania 6CA4 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 6CL6 Vacuum Tubes Black Bottle new in box International ServicemasterThis matched pair of RCA gray plate 6CL6 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 42 and 44 where minimum (65%) is 30 and 100% is 46. 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