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Selectoformer Type A

Selectoformer Type A; Electrical Research (ID = 1125566) Radio part
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Selectoformer Type A; Electrical Research (ID = 1125566) Radio part
Electrical Research: Selectoformer Type A [Radio part] ID = 1125566 933x533
Select picture or schematic to display from thumbnails on the right and click for download.
For model Selectoformer Type A, Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
 
Country:  United States of America (USA)
Manufacturer / Brand:  Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
Year: 1924 Category: Radio part (not a module) 
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Selectoformer Type A - Electrical Research
Material Various materials
Dimensions (WHD) 100 x 60 x 60 mm / 3.9 x 2.4 x 2.4 inch
Notes Replacing variocoupler and wavetrap on any crystal or tube radio; increases volume and selectivity; as the name implies the Selectoformer operates simultaneous as a selector and transformer; frequency range 200 up to 700 meters band. (Simply an antenna input coil to be tuned by a standard 23-plate condenser, where the antenna is coupled by a separate winding. That is of course better than direct tuning of a lossy antenna).
Net weight (2.2 lb = 1 kg) 0.6 kg / 1 lb 5.1 oz (1.322 lb)
Literature/Schematics (1) Popular Mechanics (issue mar 1924)

Model page created by Emilio Focosi. See "Data change" for further contributors.



All listed radios etc. from Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
Here you find 131 models, 45 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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