Matched Pair Sylvania 6BL7 6BL7GTA Vacuum Tubes Triple 3 Mica Black Plates Zenith 2BU2 NOS NIB new in box 8JV8 tube

new in box 8JV8 tube tested to spec on our Paul Hart-calibrated TV7/U

These seven new old stock

Tube One measured 60/56 while Tube Two measured 61/58 where minimum (65%) is 50/50 and 100% is 77/77

5 record cleaner and then played on our Rega Planar 3

vertical support rods and triple mica spacers for lowered microphonics and

Matched Pair Sylvania 6BL7 6BL7GTA Vacuum Tubes Triple 3 Mica Black Plates Zenith 2BU2 NOS NIB new in box 8JV8 tubeThis matched pair of Sylvania 6BL7GT dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 47 44 while Tube Two measured 48 43 where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. These tubes have copper support rods; beefy black plates: three mica spacers for improved mechanical stability and low microphonics; top D getters and anode radiators for cooler operation and extended life.