Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes 9BR7 Nonal T61 Transconductance measured 2670 micromhos for

Transconductance measured 2670 micromhos for Tube One and 2430 for Tube Two

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

new in box RCA 6U10 tube tested to spec on our Paul Hart-calibrated TV7/U

a thimble getter and excellent flashing

Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes 9BR7 Nonal T61 Transconductance measured 2670 micromhos forThis 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