Matched Pair Sylvania 6BL7 6BL7GT 6BL7GTA Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Sixteen LPs Listed new in box (for Tube

new in box (for Tube One) matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

This gold pin

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

Plate current measured 20

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 new in box (for TubeThis 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