Matched Pair Sylvania 6BL7 6BL7GT 6BL7GTA Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Sixteen LPs Listed Plate current measured 20

Plate current measured 20

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

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

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

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

Matched Pair Sylvania 6BL7 6BL7GT 6BL7GTA Vacuum Tubes Black Plate Triple 3 Mica NOS NIB Sixteen LPs Listed Plate current measured 20This 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