Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes 9BR7 Nonal T61 This new old stock-TESTING matched

This new old stock-TESTING matched pair of Sylvania silver top 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts for shorts

This GE 7716 tested to spec on our Paul Hart-calibrated TV7/U

new in box Tung-Sol 66BC8 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 This new old stock-TESTING matchedThis 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