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2

2 ; Operadio Corp.; St. (ID = 897629) Radio 2 ; Operadio Corp.; St. (ID = 897630) Radio
2 ; Operadio Corp.; St. (ID = 897631) Radio 2 ; Operadio Corp.; St. (ID = 897632) Radio
2 ; Operadio Corp.; St. (ID = 1278775) Radio  
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2 ; Operadio Corp.; St. (ID = 897629) Radio
Operadio Corp.; St.: 2 [Radio] ID = 897629 700x933
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For model 2, Operadio Corp.; St. Charles (IL):
The first self-contained portable radio, with antenna, batteries and horn
 
Country:  United States of America (USA)
Manufacturer / Brand:  Operadio Corp.; St. Charles (IL)
alternative name
 
Operadio Mfg,
Year: 1923/1924 Type: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: 99 99 99 99 99 99
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries  Volt
Loudspeaker Horn
Power out
from Radiomuseum.org Model: 2 - Operadio Corp.; St. Charles IL
Material Leather / canvas / plastic - over other material
Shape Portable set > 8 inch (usable without mains)
Price in first year of sale 190.00 $
Collectors' prices  
External source of data Ernst Erb
Source of data Radio Collector`sGuide 1921-
Mentioned in The Radio CollectorGrinder, 1995
Literature/Schematics (2) Radio Broadcast, Jul. 1924, p. 274

All listed radios etc. from Operadio Corp.; St. Charles (IL)
Here you find 62 models, 39 with images and 29 with schematics.


  
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