Matched Pair RCA 6CL6 Vacuum Tubes Black Bottle 61 and 66 where minimum

61 and 66 where minimum (65%) is 45

I just cleaned this LP set on my VPI 16

This tube has shiny black plates

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

things have obviously improved

Matched Pair RCA 6CL6 Vacuum Tubes Black Bottle 61 and 66 where minimumThis 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