Matched Pair Raytheon JAN-CRP-6V6-GT VT107A 6V6 6V6GT Vacuum Tubes Valves Milspec Black Glass New-Testing Engraved Base These six 12BY7 / 12BY7A

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

Tube One measured 33 while Tube Two measured 34 where minimum (65%) is 32 and 100% is 49

hexagonal top mica spacer

US-manufactured Amperex 7699 tube tested to spec on our Paul Hart-calibrated TV7/U

They measured 86/82

Matched Pair Raytheon JAN-CRP-6V6-GT VT107A 6V6 6V6GT Vacuum Tubes Valves Milspec Black Glass New-Testing Engraved Base These six 12BY7 / 12BY7AThis new old stock testing matched pair of milspec Raytheon black glass VT 107 A JAN CRP 6V6 GT output tubes was tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas and they test as follows: Tube One Plate Current Draw: 25. 2 milliamps Tube Two Transconductance: 2610 Tube Two Plate Current Draw: 27. 9 milliamps Tube Two Transconductance: 2750 (New US made