Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes NOS NIB X Ray Xray new in box Philco 6V7G

new in box Philco 6V7G tube tested to spec on our Paul Hart-calibrated TV7/U

I am writing during the first few pianissimo minutes and the surface noise is distracting

This Sylvania number / type 36 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box National Union type 43 tubes tested to spec on our Paul Hart-calibrated TV7/U

This variety has copper support rods

Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes NOS NIB X Ray Xray new in box Philco 6V7GThis matched pair of new old stock, new in box (For Tube One) GE 6SL7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 45 38 while Tube Two measured 42 41 where minimum (65%) is 32 32 49 49. They have steel plates; steel support rods; 59 43 188 5 and 5 48 188 5 date provenance codes; solid top mica spacers; side harp getters; tall bases; medium bottles and