Cunningham 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape April 25 2022 new in box GE 33GY7A

new in box GE 33GY7A tubes tested to spec on our Paul Hart-calibrated TV7/U

where minimum (65%) is 48

new in box Tung-Sol 6136 tubes

They tested (from left to right) as follows: 56

There were made by Sovtek's predecessor during The Cold War and

Cunningham 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape April 25 2022 new in box GE 33GY7AThis black plate Cunningham 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 50 53 where minimum (65%) is 40 40 and 100% is 62 62. It has a nifty, old fashioned Coke bottle; a dimple sheet getter, excellent flashing and an X2 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