Matched Pair Tung-Sol 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB 1X2B

Matched Pair Tung-Sol 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB 1X2BThis new old stock, new in box matched pair of Tung Sol 12SL7 12SL7GT dual triodes was tested on our Pau Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 40 40 for Tube One and 42 46 for Tube Two where minimum (65%) is 32 32. These tubes have beautiful flashing, top, harp getters, crenalated mica spacers and gray, ladder plates. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT

harp getter with sheet) measured 44 while Tube Two (12B4A

I have played them in my Radio Craftsmen RC-2 monoblocks and they sound great

new in box GE 6BD6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This perfectly-matched pair of RCA gray plate 5763 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Tubes Two through Seven tested 40/38

great flashing

32 and 35 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25

6SL7s can sub for 6SN7s in some amps but I do not recommend experimenting as they have very-different bias voltages

This lot of nine new old stock

BECAUSE OF THE BIZARRE

This RCA 6HJ5 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Raytheon 6BC7 tubes tested to spec on our Paul Hart-calibrated TV7/U