Matched Pair Unitron 6AK5 5654 6J1 6J2 Vacuum Tubes NOS NIB 9U8 GE-BRANDED 40KG6A / PL509 tube

GE-BRANDED 40KG6A / PL509 tube tested to spec on our Paul Hart-calibrated TV7/U

They have dimpled

This offering is for 3 subminiature X-ray suppression shields suitable for 6AU6-size tubes

It has a smooth top

45 and 48 where minimum is (65%) is 36 and 100% is 55

Matched Pair Unitron 6AK5 5654 6J1 6J2 Vacuum Tubes NOS NIB 9U8 GE-BRANDED 40KG6A / PL509 tubeThis new old stock, new in box (For Tube One) matched pair of Unitron 6AK5 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they tested as follows: Tube One (Unitron 5654 LABELED, likely Tung Sol MANUFACTURED) measured 31 while Tube Two (no silkscreening 6AK5 LABELED, likely Tung Sol MANUFACTURED) measured 33 where minimum (65%) is 22. Both tubes are the same on the inside with