General Electric GE 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 8FQ7 8CG7 These four Super Silvertone 12A8GT

These four Super Silvertone 12A8GT tubes were tested for shorts

Transconductance measured 35

forward sound with great bass articulation as well

Three of these four new old stock

1 milliamps with a transconductance of 2260 micromhos while Tube Two measured 23

General Electric GE 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 8FQ7 8CG7 These four Super Silvertone 12A8GTThis black plate GE 5Y3G rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 40 40 where minimum (65%) is 40 40 and 100% is 62 62. It has a nifty, old fashioned Coke bottle; dimple sheet getter, outstanding flashing and a 43 C2 date code. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE