RCA Black Plate 6CG7 6FQ7 Vacuum Tube With Shields NOS NIB Interstage new in box RCA 8CX8

new in box RCA 8CX8 tube tested to spec on our Paul Hart-calibrated TV7/U

The two on the left were made by Mullard

This matched pair of RCA type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

For those who enjoy the historical aspects early HiFi and/or a Kentomaniac with love for early pressings

RCA Black Plate 6CG7 6FQ7 Vacuum Tube With Shields NOS NIB Interstage new in box RCA 8CX8This new old stock, new in box RCA black plate 6CG7 6FQ7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured an almost perfectly balanced 82 84 where minimum (65%) is 50 50 and 100% is 77 77. This tube has steel support rods; a dimpled D getter and matte black plates. There is a shield between the triodes for reduced cross talk. I have played it in my Schiit Vali 2