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E_Moorhead

Information - Help 
ID = 28547
       
Country:
United States of America (USA)
Brand: Moorhead Laboratories (Pacific); San Francisco
Tube type:  Triode, vacuum   Universal 
  <1925 very rare. ***
Identical to E_Moorhead = R_England
First year 1919 Saga of the Vacuumtube, Tyne page 172

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.65 Ampere / Direct / Battery =
Description

Family - according to Tyne: Type A is similar to SE-1444, also with hard vacuum for amplification. Type B is a similar tube, but with a low vacuum for operation as a detector with 18-40 volts on the anode. Type C is similar to Type A, except that the grid is constructed of 22 turns of molybdenum wire with a pitch of 0.3 inch, instead of nickel - and for anode voltages of 80 - 500 volts. Type D is the unbased Electron Relay (ER) previously made by Moorhead. Type E is the British standard Type R, similar to Type A, but with spherical bulb and European standard four-pin base. Type F is similar to Type E, but with a low vacuum like the Type B. Type G is similar to Type C, but has a spherical bulb and an European standard four-pin base. This tube base was made by the Shaw Insulator Company, an associate of Moorhead Laboratories. It is the same as the British standard Type B tube.

 
Dimensions (WHD)
incl. pins / tip
x 110 x 54 mm / x 4.33 x 2.13 inch
Literature Saga of the Vacuumtube, Tyne   Page 172
-- Collector info (Sammler)   
 
moorhead_brit_r~~1.jpg
E_Moorhead: Bill Condon collection, with kind permission of Mrs V Condon
Fin Stewart

 
e_moorhead_so.png
E_Moorhead: rtt
Michael Schlör

 

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