Sylvania Black Plate 5U4 5U4G Vacuum Tube Rectifier Shoulder ST Shape June 19 2024 black plates and jd AED

black plates and jd AED date codes

(New 12AT7s / ECC81 typically test within 1

new in box GE 21LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

These seven Philco number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

Sylvania Black Plate 5U4 5U4G Vacuum Tube Rectifier Shoulder ST Shape June 19 2024 black plates and jd AEDThis Sylvania 5U4G rectifier tube tested an underwhelming 32 in Section One and 44 in Section Two on our Paul Hart calibrated TV7 U where minimum (65%) is 40 40 and 100% is 62 62. It has a bottom D getter; a 313 date code and mediocre flashing. IT IS MISSING ITS CENTERING PIN. THE BASE HAS BEEN MARKED FOR SAFE AND EASY INSERTION. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE