2 National Union NU 12K7 12K7G 12K7GT Vacuum Tubes Valves NOS NIB Lot Of Two February 10 2023 They measured 84/74 for Tube

They measured 84/74 for Tube One and 87/73 for Tube Two where minimum (65%) is 57/57 and 100% is 88/88

shields between triodes to eliminate crosstalk

They are not suitable for guitar amp application as they are somewhat microphonic

Minimum is 25

2 National Union NU 12K7 12K7G 12K7GT Vacuum Tubes Valves NOS NIB Lot Of Two February 10 2023 They measured 84/74 for TubeThis lot of two (one 12K7G and one 12K7GT) National Union 12K7 tubes tested to spec on our Paul Hart calibrated TV7 U. 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 QUESTIONS. 1. MOST OF THE TUBES WE SELL ARE OVER 70 YEARS OLD. WE CANNOT GUARANTEE FOR FAILURES AFTER POWER UP AS THERE