Matched Pair Sylvania 6BL7 6BL7GT Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Matched Pair 6AU6 pops and ticks

pops and ticks

new in box US-made 6X8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Hopefully there will no shorts or gas

but also have much lower gain

Matched Pair Sylvania 6BL7 6BL7GT Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Matched Pair 6AU6 pops and ticksThis new old stock, new in box (for Tube One (centering pin missing)) 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 (centering pin missing) measured 46 46 while Tube Two measured 50 46 where minimum (65%) is 25 25 and 100% is 39 39. These tubes have copper support rods; beefy black ladder plates; three (rather than two) mica spacers for improved