Full-Wave Rectifier
The Delco 5Z3 Vacuum tube is a glass type used in
power supplies of radio equipment
having large DC requirements. They require a four-contact
socket. Vertical tube mounting is preferred, but
horizontal opration is permissible if pins 1 and 4
are in horizontal plane.
The Delco Electronics Corporation was the automotive
electronics design and manufacturing subsidiary of
General Motors based in Kokomo, Indiana.
The name Delco came from the Dayton Engineering
Laboratories Co., founded in Dayton, Ohio by Charles
Kettering and Edward A. Deeds in 1909.
These tubes were used extensively in Automobile / Car
radios. The Delco company made all of GM's tubes for
their radios. And of course GM stands for General Motors.
If you are wanting the perfectly restored car radio for
your classic wheels, these tubes are what you want!
Delco was responsible for several innovations in
automobile electric systems, including the first
reliable battery ignition system and the first practical
automobile self starter.
Electrical Data:
Heater Voltage ................................ 5.0 V
Heater Current ................................ 3.0 A
Preferred Substitutes ......................... 83