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2S/4S

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ID = 43957
       
Country:
United States of America (USA)
Brand:
Tube type:  Double Diode   Detector 
Identical to 2S/4S
Similar Tubes
Normally replaceable-slightly different:
  2S ; 4S
Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.35 Ampere / Indirect / Specified voltage AND current AC/DC
Description

Replacement type for Grigsby Grunow (Majestic) types 2S and 4S. Tubes were only made by National Union, Raytheon and Sylvania. These manufacturers used sheet metal shields, probably "Goat" brand, rather than the sprayed types made by Grigsby Grunow. After this company closed, these tubes continued to be made for a couple of years by the other companies mentioned above. href=http://www.radiomuseum.org/tubes/tube_g2.html "target="blank">G2 andG4

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 x 103 x 38 mm / x 4.06 x 1.50 inch
Weight 34 g / 1.20 oz
Information source Babani, International Radio Tube Encyclopaedia   p. 6 & 7
Babani, International Radio Tube Encyclopaedia   
Taschenbuch zum Röhren-Codex 1948/49
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
2s_4s.png 2S/4S: From my schematic collection.
Pier Antonio Aluffi

Just Qvigstad 		2s4sreduitdoc.png
2S/4S: Babani 1949-1951
Patrice Zeissloff

Collection of

David Erali (USA)
 
raytheon_2s_4s_bm.jpg

 
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