Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes NOS NIB Globe Pental I am playing them in

I am playing them in one of my RC-2 monoblocks with Super Furry Animals' "Radiator" and they sound great

new in box Tung-Sol 7Y4 tube tested to spec on our Paul Hart-calibrated TV7/U

I have played them in my Musical Paradise 301 MK 3 (with adapters

The noise floor on this tester is -92dB/-92dB

Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes NOS NIB Globe Pental I am playing them inThis new old stock, new in box matched pair of GE 12SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 74 75 for Tube One and 75 76 for Tube Two where minimum (65%) is 50 50. They have gray, ladder plates; crenelated, round top mica spacers with an excised square and circle each, O getters; copper support rods; tall bases and RT 188 5 and KV 188