Matched Pair General Electric GE 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB 5654 Mini Mite Transconductance readings are 46

Transconductance readings are 46

36 and 48 where minimum (65%) is 29

-- GE 6L6GC output tube was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

US Navy markings and excellent flashing

rectangular mica spacers

Matched Pair General Electric GE 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB 5654 Mini Mite Transconductance readings are 46This new old stock, new in box matched pair of GE 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 50 for Tube One and 45 45 for Tube Two where minimum (65%) is 32 32. These tubes have copious bottom flashing, bottom, dimpled sheet getters, steel plates and steel suppost rods. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT