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ID = 28986
United States of America (USA)
Brand: Moorhead Laboratories (Pacific); San Francisco
Developer: Moorhead Laboratories (Pacific); San Francisco 
Tube type:  Triode, vacuum   Audio Frequency 
  <1925 very rare. ***
Identical to A-P_Oscillator
First year Aug.1920 Saga of the Vacuumtube, Tyne page 176

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Military and/or Government
Filament Vf 4 Volts / If 0.4 Ampere / Direct / Battery = /

This tube was made early in 1920 and was fitted with Shaw Standard base. The Shaw Insulator Company were associated with Moorhead laboratories. As a transmitting tube, output was ca 12.5 Watts.

Text in other languages (may differ)
Literature Saga of the Vacuumtube, Tyne   page 176

A-P_Oscillator: Fin Stewart
Fin Stewart


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