Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes FU7 Musical Paradise

Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes FU7 Musical ParadiseThis 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 28 35 while Tube Two measured 37 30 where minimum (65%) is 32 32 49 49. They have steel plates; steel support rods; 0 26 188 5 and 8 52 188 5 date provenance codes; solid top mica spacers; side harp getters; tall bases; medium bottles and excellent flashing. I am playing them as I

new in box RCA 6EH5 tubes tested to spec on our Paul Hart-calibrated TV7/U

These two Hytron 7C4 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 72/74 while Tube Two (Zenith-LABELED) measured 74/73 where minimum (65%) is 50/50 and 100% is 77/77

wire snubbers for lowered microphonics

Gain (Mu (µ): 24 / 23

There are two new old stock

new in box Tung-Sol 50X6 tube tested to spec on our Paul Hart-calibrated TV7

This lot of three Silvertone coated glass 50L6GT tubes was tested on our Paul Hart-calibrated TV7/U for shorts

respectively and nice black and silver bottles

I am playing it in Bottlehead Crack headphone amplifier as a 12AU7 substitute and it sounds fine

new in box Ken-Rad 35Z6 output tube tested to spec on our Paul Hart-calibrated TV7/U

where minimum (65%) is 50/22