Matched Pair Sylvania 6BL7 6BL7GT 6BL7GTA Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Sixteen LPs Listed It measured 42/44 where minimum

It measured 42/44 where minimum (65%) is 33/33 and 100% is 51/51

32/38 and 33/36 where minimum (65%) is 25/25

Philco-BRANDED 14AF7 / XXD chrome dome dual triode tested to spec on our Paul Hart-calibrated TV7/U

GM-Delco-BRANDED 6AX8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6BL7 6BL7GT 6BL7GTA Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Sixteen LPs Listed It measured 42/44 where minimumThis new old stock, new in box (for Tube Two) matched pair of Sylvania 6BL7GTA dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 40 44 while Tube Two measured 42 46 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