4 US-Made 3GK5 Vacuum Tubes Valves NOS NIB Lot Of Four Eightynine " They have black and

" They have black and silver glass

52 and 60 where minimum (65%) is 36 and 100% is 55

The disks are well-made and quiet with just a few pops and ticks here and there

This matched pair of Westinghouse black plate 12AU7A / ECC82 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

4 US-Made 3GK5 Vacuum Tubes Valves NOS NIB Lot Of Four Eightynine " They have black andThese four new old stock, new in box US made 3GK5 tubes tested to spec on our Paul Hart calibrated TV7 U. IN 2021 WE PURCHASED 150,000 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 IS NO WAY TO