Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate Pental Grid Cap Add $20 for US dependencies

Add $20 for US dependencies and $50 for the rest of the world

It is probably a Mullard

Transconductance measured 44 for Tube One and 46 for Tube Two where minimum (65%) is 40 and 100% is 62

This trio of US-made 6X4 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate Pental Grid Cap Add $20 for US dependenciesThis Sylvania 5Y3GT black plate rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 54 53 where minimum (65%) is 40 40 and 100% is 62 62. This tube has a top D getter, short base; massive plates and an EG MHT date code. Im playing it now in one of my Radio Craftsman RC 2 mono blocks and it sounds great. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT