Matched Trio Sylvania 7A7 Vacuum Tubes Valves Lot Of Three Hill Terry Gilkyson They measured 40

They measured 40

They have NU 188-5 and 3-09 188-5 date/provenance codes

Tube One has some oxide flaking

new in box US-made 12K7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Trio Sylvania 7A7 Vacuum Tubes Valves Lot Of Three Hill Terry Gilkyson They measured 40This new old stock testing, perfectly matched trio of Sylvania 7A7 tubes was tested on our Hickok 800 for shorts, gas and transconductance. There were no shorts or gas. All measured 1950 micromhos where new nominal is 2000 and minimum (65%) is 1300. 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