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Dictogrand (Portable) R-4

Dictogrand R-4; Dictograph Products (ID = 1205058) Speaker-P Dictogrand R-4; Dictograph Products (ID = 1205059) Speaker-P
Dictogrand R-4; Dictograph Products (ID = 1205060) Speaker-P Dictogrand R-4; Dictograph Products (ID = 1205061) Speaker-P
Dictogrand R-4; Dictograph Products (ID = 1205062) Speaker-P Dictogrand R-4; Dictograph Products (ID = 1205064) Speaker-P
Dictogrand R-4; Dictograph Products (ID = 1205066) Speaker-P Dictogrand R-4; Dictograph Products (ID = 1371331) Speaker-P
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Dictogrand R-4; Dictograph Products (ID = 1205058) Speaker-P
Dictograph Products: Dictogrand R-4 [Speaker-P] ID = 1205058 933x1147
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For model Dictogrand (Portable) R-4, Dictograph Products Co. International (General Acoustic; Acousticon; Turner) ; New York:
Ebay User radios10467 Item 140727338762
 
Country:  United States of America (USA)
Manufacturer / Brand:  Dictograph Products Co. International (General Acoustic; Acousticon; Turner) ; New York
Year: 1923 Category: Loudspeaker, headphone or earphone
Wave bands - without
Details
Power type and voltage No Power needed
Loudspeaker Horn
Power out
from Radiomuseum.org Model: Dictogrand R-4 - Dictograph Products Co.
Material Various materials
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 10 x 13 x 0 inch / 254 x 330 x 0 mm
Notes

Dictograph Radio Loud Speaker Model Dictogrand Type R-4.
Unique low profile horn design. Metal horn. Spacing between diaphragm and magnet adjustable with front panel knob (volume control).

According to "Radio Horn Speaker Encyclopedia", the "portable" model was available in 3 different variants (black, mahogany, rubber). However, the Encyclopedia does not discern between models R-3 and R-4.

Literature/Schematics (1) Radio Horn Speaker Encyclopedia, by Floyd A.Paul
Literature/Schematics (2) Popular Science, Nov. 1924

Model page created by Franz Scharner. See "Data change" for further contributors.



All listed radios etc. from Dictograph Products Co. International (General Acoustic; Acousticon; Turner) ; New York
Here you find 28 models, 26 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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