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ID = 28847
United States of America (USA)
Brand: General Electric for Brand RCA-Radiotron; Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to UV216B
Similar Tubes
Normally replaceable-slightly different:
Other base:
First year Sep.1925 Saga of the Vacuum Tube, Tyne page 323
Predecessor Tubes UV216   UV216A  
Successor Tubes UX216B  

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Parallel, (AC/DC)
Description Work started on this tube at the GE laboratories in the fall of 1924.and it was assigned the type number UV216B in March1925. It was announced to the public in September 1925. This tube's type number was used as a replacement for the UV216A, which caused confusion with the Western Electric type 216A. Being a rectifier, GE gave this tube the brand name "Kenotron" 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 132 x 54 mm / x 5.20 x 2.13 inch
Weight 69 g / 2.43 oz
Literature Saga of the Vacuum Tube, Tyne   p.323
- - Manufacturers Literature   evelopment of Radiotron transmitting tubes to 1933
UV216B: own collection
Peter den Boer


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