Matched Pair RCA 6AK5 EF95 Vacuum Tubes NOS NIB Matched Pair 12AX7 Transconductance measured 56/56 for Tube

Transconductance measured 56/56 for Tube One and 58/58 for Tube Two where minimum (65%) is 25/25 and 100% is 38

new in box Sylvania 12AV7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Their filaments are spirally-wound -- hence the "S" in "ECC83S" -- for low noise operation

old-fashioned

Matched Pair RCA 6AK5 EF95 Vacuum Tubes NOS NIB Matched Pair 12AX7 Transconductance measured 56/56 for TubeThis new old stock, new in box matched pair of RCA 6AK5 tubes was tested on our Paul Hart calibrated TV7 U tester for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 31 while Tube Two measured 32 where minimum (65%) is 22. I am playing them now in my Mini 2013 as I write and they sound excellent. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE