[ARC5] ARC's first range receiver of 1929

[zakariya.abu at yandex.com]

Thank you, Gordon, for sharing the information. The scanned picture 
showed ARC Model B, which I understand preceded model D, which offered 
much wider frequency coverage.

I checked the text of the 1927 International Telegraph Convention of 
Washington. Interestingly, it listed 333 kcs. as the international 
calling wave for air services.

If memory serves, 273 kcs. was used as a universal airport tower 
frequency in that time. Could someone verify this, please?

73,

Jan SP5XZG


W dniu 23.02.2025 o 17:26, gordon white pisze:
>       Aircraft Radio Corp. began "life" as a subsidary of Radio 
> Frequency Laboratories in Boonton, N.J. in 1927.  RFL was a strictly 
> research and design operation, without any ability to actually 
> manufacture radio equipment.  Stromberg-Carlson had been manufacturing 
> entertainment radios for some time and thus had a manufacturing 
> capability, so was chosen to actually build equipment RFL/ARC designed.
> 
>      The Model D Receiver was designed to meet the  requirement for an 
> aircraft receiver to receive the 285-315 kc and 315-350 kc radio beacon 
> and communications signals allocated by the 1927 international convention.
> 
>      (Contributions from the Radio Frequency Laboratories, by F.H. 
> Drake, Feb. 1929)
> 
> A.R.C. later broke off from  RFL and, shortly before the U.S. got into 
> WW II, created its own manufacturing plant in Boonton. The press of need 
> for large numbers of wartime procurement led both Stromberg-Carlson  and 
> Western Electric Co. to become subcontractors to A.R.C.
> 
>      If anyone wants a photocopy of this publication,  send me a # 10 
> stamped, self-addressed envelope.
> 
> 
> -Gordon Eliot White
> 
> PO)O Box 129
> 
> Hardyville, VA 23070
>