Sylvania 5Y3 5Y3GT Vacuum Tube Black Plate April 28 2025 6 volts on the filaments

6 volts on the filaments

I can't tell you how they sound as we don't have any equipment that runs them

new in box RCA 6DN3 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 12HG7 / 12GN7 / 12GN7A tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 12AX4 tubes tested to spec on our Paul Hart-calibrated TV7/U

Sylvania 5Y3 5Y3GT Vacuum Tube Black Plate April 28 2025 6 volts on the filamentsThis 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 52 48 where minimum (65%) is 40 40 and 100% is 62 62. This tube has a top O getter; chunky, shiny black plates; mediocre flashing and 395 739 date codes. Im playing it now in one of my Radio Craftsman mono blocks and it sounds great. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF