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ER_Moorhead

Information - Aide 
ID = 50751
       
Pays:
Etats-Unis
Fabricant: Moorhead Laboratories (Pacific); San Francisco
Concepteur: Moorhead Laboratories (Pacific); San Francisco 
Type:  Gas Triode   Detector 
  <1925 très rare
Identique à ER_Moorhead = ER_Marconi
Similaires
Remplaçants avec petites différences :
  D_Moorhead
Première série Jul.1916 Saga of the Vacuum Tube, Tyne page 167
Prédécesseurs Moorhead_1  
Successeurs Moorhead_Ext_Grid   ER_Moorhead-1917  
Culot UV-Base (4 Pins+Bayonet, USA 1914 WE)
Utilisé par Radio/TV-reception etc.
Chauffage Vf 4 Volt / If 0.7 Ampère / Direct / Battery =
Description

The 1916 version of the ER (Electron Relay) was unmarked but can be identified by the press construction and length to width ratio. There are two versions: Single or double filament. Moorhead made a predecessor in 1915 but this is not known because no ads were made and only few were sold. Most ER you find are marked as such - see ER_Moorhead-1917. Anode 18-40 Volt
. The base on this tube was made by the Shaw Insulator Company, which was associated with Moorhead laboratories.

 
Dimensions
(l x h x p)
incl.pins/tip		 44 x 102 x 35 mm / 1.73 x 4.02 x 1.38 inch
Prix 3 Prix (visible pour membres seulement)
Bibliographie Saga of the Vacuum Tube, Tyne   Pages 170-174
-- Collector info (Sammler)   
2a_uv4~~6.png ER_Moorhead: own collection
Peter den Boer † 2025

Just Qvigstad 		moorhead_valves~~1.png
ER_Moorhead: Manufacturer Advertisement
Stefan Müller

Collection de

Alan Larsen (USA)
Geri Meier (CH)
Robert Gillespie (USA)
Rudolf Osterkamp (D)
 
ermoorehead_1_klein.jpg

Plus d'infos ...
 

Variantes

Anode is considerably longer. Bulb and base measures are unchanged.
Contributions forum pour ce composant
ER_Moorhead
Discussions: 1 | Publications: 1
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First picture of the Moorhead Electron Relay
Alan Larsen
25.Oct.14 		  1
First picture of the Moorhead Electron Relay 

The August 1916, issue of The Electrical Experimenter magazine was the first advertisement to offer a picture of the 1916 Moorhead Electron Relay. As noted in the advertisement, the tube was available with either a single filament or a double filament for $1.50 more.

At this time Moorhead was advertising under the name of Pacific Laboratories.

 
 
ER_Moorhead
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