Matched Pair RCA 6AK5 EF95 Vacuum Tubes NOS NIB Matched Pair 12AX7 Their filaments are spirally-wound --

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

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

(New 12AU7s typically test within one standard deviation of 2200 micromhos

wire snubbers for lowered microphonics

Matched Pair RCA 6AK5 EF95 Vacuum Tubes NOS NIB Matched Pair 12AX7 Their filaments are spirally-wound --This 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