Matched Pair Sylvania 6BL7 6BL7GTA Vacuum Tubes Triple 3 Mica Black Plates Zenith 2BU2 NOS NIB but still usable especially in

but still usable especially in experimental situations where the tube might be damaged -- on our Paul Hart-calibrated TV7/U

WE HAVE THOUSANDS OF VINTAGE ELECTRONIC ITEMS

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

54 and 64 where minimum (65%) is 50

There are a few pops and ticks

Matched Pair Sylvania 6BL7 6BL7GTA Vacuum Tubes Triple 3 Mica Black Plates Zenith 2BU2 NOS NIB but still usable especially inThis 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.