General Electric GE 5 Star 6080 6AS7 Vacuum Tube Valve For Your Headphone Amplifier Industrial Grade NOS-Testing 9001 Septal T35 new in box RCA 6U10

new in box RCA 6U10 tube tested to spec on our Paul Hart-calibrated TV7/U

29 and 30 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

64 and 72 where minimum (65%) is 45 and 100% is 69

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

General Electric GE 5 Star 6080 6AS7 Vacuum Tube Valve For Your Headphone Amplifier Industrial Grade NOS-Testing 9001 Septal T35 new in box RCA 6U10This General Electric GE 5 Star 6080 6AS7 dual triode output tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured an excellent 65 66 where minimum (65%) is 36 36. I played this tube this morning it in my Bottlehead Crack headphone amp with Sennheiser SD 580s and it sounded excellent. It is dead quiet when the preamp is muted and has excellent frequency response,