Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing Swiss-Made new in box Sylvania 6V4

new in box Sylvania 6V4 / EZ80 rectifier tube tested to spec on Paul Hart-calibrated TV7/U

I playing Easy Star All-Stars' "Dub Side of The Moon" through my Radio Craftsmen RC-2 amplifiers and they sound outstanding

They measured 20/18 and 35/30

Transconductance readings are 30

These ten new old stock

Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing Swiss-Made new in box Sylvania 6V4This matched pair of Sylvania 6AU6 tubes was tested on our Hickok 800 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2100 micromhos for Tube One and 2175 for Tube Two. (New US made 6AU6s typically test within one standard deviation of 2300 micromhos; minimum (65%) is 1495.) 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"