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Royal-T Hearing Aid

Royal-T Hearing Aid; Zenith Radio Corp.; (ID = 1895660) Misc
 
Royal-T Hearing Aid; Zenith Radio Corp.; (ID = 1895662) Misc
Royal-T Hearing Aid; Zenith Radio Corp.; (ID = 279092) Misc Royal-T Hearing Aid; Zenith Radio Corp.; (ID = 2550191) Misc
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Royal-T Hearing Aid; Zenith Radio Corp.; (ID = 279092) Misc
Zenith Radio Corp.;: Royal-T Hearing Aid [Misc] ID = 279092 640x480
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For model Royal-T Hearing Aid, Zenith Radio Corp.; Chicago, IL:
Image with courtesy by Ebayseller 3keepers
 
Country:  United States of America (USA)
Manufacturer / Brand:  Zenith Radio Corp.; Chicago, IL
alternative name
 
Chicago Radio Lab
Year: 1953 Category: Miscellaneous (Other, Various) - see notes
Semiconductors (the count is only for transistors) 3: CK718 CK718 CK718
Main principle Audio-Amplification
Wave bands - without
Details Hearing aid
Power type and voltage Dry Batteries / 1.5 Volt
Loudspeaker - only for Earphone!
Power out
from Radiomuseum.org Model: Royal-T Hearing Aid - Zenith Radio Corp.; Chicago,
Material Metal case
Shape Very small Portable or Pocket-Set (Handheld) < 8 inch.
Notes Worlds first transistorised hearing aid, introduced Oct.1953; a single 1.5Volt "N" cell allowed operation for ca 15 cents a month, while comparable tube models operated at $4.50 to $9.00 a month. The following year 1954 brought already five successive transistorised models;
Mentioned in Zenith Transistor Radios

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.



All listed radios etc. from Zenith Radio Corp.; Chicago, IL
Here you find 4264 models, 3890 with images and 3381 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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