Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes 9BR7 Nonal T61 period labels and stamped /

period labels and stamped / engraved bases

It had no shorts or gas and measured 52/52 for Tube One and 56/56 for Tube Twoo where minimum (65%) is 40/40 and 100% is 62/62

Two are available initially

rounded plates

a foil getter and mesh plates and the base wiggles a bit

Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes 9BR7 Nonal T61 period labels and stamped /This matched pair of 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 31 34 while Tube Two measured 32 35where minimum (65%) is 32 32 49 49. They have steel plates; steel support rods; 1 13 188 5 and 188 5 date provenance codes; solid top mica spacers; side harp getters; tall bases; medium bottles and excellent flashing. I am playing them as I write