Summary
Triode, used as a zero bias class AB2 push-pull output amplifier, manufacturer National Union, USA. Introduced 1933, superseded circa 1937.
2.5 volt indirectly heated cathode. With a 300 volt plate supply this tube can produce an output of 10 watts.
Physical Description
Seven-pin base.
More Information
-
Collection Names
-
Collecting Areas
-
Acquisition Information
Purchase
-
Manufacturer
-
Inscriptions
Base: NATIONAL UNION/NU 53
-
Classification
-
Category
-
Discipline
-
Type of item
-
Overall Dimensions
119 mm (Length), 46 mm (Outside Diameter)
-
References
RCA Tube handbook
-
Keywords