Matched Pair Sylvania 6AQ5 Vacuum Tubes Black Glass NOS-Testing Black Glass new in box milspec 6H6

new in box milspec 6H6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of RCA 6N7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

These three GE 6BC5 tubes tested to spec on our Paul Hart-calibrated TV7/U

(New US-made 6AU6s typically test within one standard deviation of 2300 micromhos

new in box Sylvania 6CA4 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6AQ5 Vacuum Tubes Black Glass NOS-Testing Black Glass new in box milspec 6H6This matched pair of Sylvania black glass 6AQ5 output tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 62 while Tube Two measured 62 as well where minimum (65%) is 46. It took two adapters but was worth it as they sounded fine in my Mini 2013. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE