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A-P_Rectifier

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ID = 28988
       
Country:
United States of America (USA)
Brand: Moorhead Laboratories (Pacific); San Francisco
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
  <1925 very rare. ***
Identical to A-P_Rectifier
First year May.1921 Saga of the Vacuumtube, Tyne page 176, 177

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Direct
Description

This tube is based on the de Forest rectifier and has a Shaw base with the grid pin not connected. It was first Announced in the May 1921 issue of radio News as a New rectifier tube for experimental continuous wave work. With the aid of a small transformer, it could step up mains voltages to 350. 500 or 750 volts, thus making a high voltage generator no longer necessary.

 
Text in other languages (may differ)
Literature Saga of the Vacuumtube, Tyne   page 176, 177
 
a_p.jpg
A-P_Rectifier: Radio News June 1921
Rudolf Osterkamp

 
uv~~90.png
A-P_Rectifier: Fin Stewart
Fin Stewart

 

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