6 US-Made 6AQ5 Vacuum Tubes Black Glass Lot Of Six Nonal Bonus Tube Minimum (65%) is 32/32 and

Minimum (65%) is 32/32 and 100% 66/66

new in box 6CX8 tube tested to spec on our Paul Hart-calibrated TV7/U

210 5213 and no provenance/date codes

These six 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

6DJ8s are notoriously hard to test on most testers and Paul added ferrite rings to ameliorate this problem

6 US-Made 6AQ5 Vacuum Tubes Black Glass Lot Of Six Nonal Bonus Tube Minimum (65%) is 32/32 andThis lot of six US made 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. They measured 46, 52, 54, 57, 58 and 72 where minimum (65%) is 46 and 100% is 71. It took two adapters but was worth it as all six 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