Sylvania 5U4 5U4GB Vacuum Tube Rectifier Black Plate Nine Eleven a thimble getter and excellent

a thimble getter and excellent flashing

It has flat

This matched pair of Sylvania-MANUFACTURED 6X5GT rectifier tubes was tested on our Paul Hart-calibrated TV7/U for shorts

but I glued it anyway

Sylvania 5U4 5U4GB Vacuum Tube Rectifier Black Plate Nine Eleven a thimble getter and excellentThis black plate Sylvania 5U4GB rectifier tube tested 52 48 in Sections One and Two, respectively, on our Paul Hart calibrated TV7 U where minimum (65%) is 40 40 and 100% is 62 62. It has a top O getter; a crenelated top mica spacer; black plates and jd AED date codes. THIS TUBE'S CENTERING PIN IS MISSING AND IT HAS BEEN MARKED FOR SAFE AND EASY INSERTION. THERE IS A CLOSE UP PHOTO OF THE BASE TO SERVE AS A REMINDER. WE HAVE SCORES OF THOUSANDS OF