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R-J Variometer

R-J Variometer ; DeForest Radio (ID = 1078672) mod-pre26 R-J Variometer ; DeForest Radio (ID = 1505058) mod-pre26
R-J Variometer ; DeForest Radio (ID = 1078745) mod-pre26 R-J Variometer ; DeForest Radio (ID = 1078746) mod-pre26
R-J Variometer ; DeForest Radio (ID = 1078747) mod-pre26 R-J Variometer ; DeForest Radio (ID = 1505059) mod-pre26
R-J Variometer ; DeForest Radio (ID = 1505060) mod-pre26 R-J Variometer ; DeForest Radio (ID = 1505061) mod-pre26
R-J Variometer ; DeForest Radio (ID = 1505062) mod-pre26 R-J Variometer ; DeForest Radio (ID = 1505063) mod-pre26
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R-J Variometer ; DeForest Radio (ID = 1078672) mod-pre26
DeForest Radio: R-J Variometer [mod-pre26] ID = 1078672 933x759
Select picture or schematic to display from thumbnails on the right and click for download.
For model R-J Variometer, DeForest Radio Telephone & Telegraph Co. (De Forest); New York:
by courtesy of Alan Douglas (This ad appeared in the April 1909, Modern Electrics magazine advertisement on page 38)
 
Country:  United States of America (USA)
Manufacturer / Brand:  DeForest Radio Telephone & Telegraph Co. (De Forest); New York
alternative name
 
Lee De Forest Mfg.
Year: 1909 Category: Radio module pre 1926 (not a part, not a key)
Details
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: R-J Variometer - DeForest Radio Telephone &
Material Various materials
Shape Chassis only or for «building in»
Notes A variable tuning coil without sliding contacts, or a loose coupling using rotating coils.
Price in first year of sale 16.00 $
Mentioned in - - Manufacturers Literature (Ad in MODERN ELECTRICS (April 1909) p. 38)
Literature/Schematics (2) Radio Manufacturers of the 1920s, Vol 1 (p161)

Model page created by Michael Murray. See "Data change" for further contributors.



All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York
Here you find 155 models, 127 with images and 11 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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