[ARC5] ARC's first range receiver of 1929

[Dave Merrill]

Some interesting A.R.C. info on Wikipedia:

https://en.wikipedia.org/wiki/Aircraft_Radio_Corporation

Also check out the article by Gordon Elliott White, linked in reference #1.

Anyone else see a glaring error at the end of the 'Wartime' section?

Dave N9ZC


On Mon, Feb 17, 2025, 9:11 AM <zakariya.abu at yandex.com> wrote:

> Bob,
>
> Thanks for the follow up. The basics of Intellectual Property (IP)
> protection are obviously clear. Considering what Ray wrote, does it mean
> that the Model D receiver was only developed by A.R.C., which acted as
> an R&D facility, but the patents related to the guts inside Model D were
> owned by Stromberg Carlson, hence, the latter was manufacturing that radio?
>
> 73,
>
> Jan SP5XZG
>
>
> W dniu 17.02.2025 o 14:46, Bob Camp pisze:
> > Hi
> >
> > As the holder of a patent, you can allow folks to use your patented
> “thing” in their product. You can also tell them they can’t use it. When
> you allow them, sometimes they give you money for the right to use your
> “thing”. The way you allow them is to give them a license to use the
> patent. As a “big company” you likely already have licenses to various
> patents. They may be your own patents. You also might have done a “swap”
> with somebody for the license (I’ll let you use mine if you let me use
> yours ….).
> >
> > Stromberg Carlson was very much in the radio business right up to the
> point they split things up. At that point the radio group became part of
> General Dynamics. That GD group faded away and RF Communications (which
> became Harris RF) popped up in its place. Yes, that’s a *very* abbreviated
> / simplified version.
> >
> > Bob
> >
> >> On Feb 17, 2025, at 7:43 AM, zakariya.abu at yandex.com wrote:
> >>
> >> Ray,
> >>
> >> That's an interesting information. Could you please elaborate it
> further? What kind of license was necessary at the turn of the 1920s and
> 1930s to manufacture radios in the US? Was it related to the Prohibition
> times?
> >>
> >> 73,
> >>
> >> Jan SP5XZG
> >>
> >>
> >> W dniu 17.02.2025 o 13:39, raydio862--- via ARC5 pisze:
> >>> At that time Aircraft Radio Corp. did not have license to manufacture
> radios covered by several patents so Stromberg Carlson built it for them.
> >>> Ray
> >>> -----Original Message-----
> >>> From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On
> Behalf Of zakariya.abu at yandex.com
> >>> Sent: Monday, February 17, 2025 7:33 AM
> >>> To: arc5 at mailman.qth.net
> >>> Subject: Re: [ARC5] ARC's first range receiver of 1929
> >>> Al,
> >>> Thank you very much indeed for the source information. Yes, I noted
> the plug-in coils module on the Smithsonian Institution's photo. What
> struck me was the Stromberg-Carlson's name seen just above the hand, and
> not the Aircraft Radio Corp.'s as suggested by the description on the
> Smithsonian Institution's website as below.
> >>> https://airandspace.si.edu/multimedia-gallery/14185hjpg
> >>> As far I as know, Stromberg-Carlson has always been into the telecom
> business, and acted as a contractor to make radio receivers for the
> military during WW II (eg. the BC-348). Does it mean that Stromberg-Carlson
> purchased the license or manufacturing rights from the A.R.C. to make Model
> D? I can't find a definite the answer in the 1930 QST piece.
> >>> By the way, A.R.C. later made a neat and compact Type 185 range
> receiver for the Navy, which covered  200 to 420 kcs.
> >>> 73,
> >>> Jan SP5XZG
> >>> W dniu 17.02.2025 o 02:10, Al Klase pisze:
> >>>> Jan,
> >>>>
> >>>> Note the plug-in coil assmebly on the side of the Rx.  It could tune
> >>>> from 235 to 8000 KHz with the appropriate coils.
> >>>>
> >>>> See attached.
> >>>>
> >>>> 73,
> >>>> Al
> >>>>
> >>>> On 2/16/2025 4:16 PM, zakariya.abu at yandex.com wrote:
> >>>>> Colleagues,
> >>>>>
> >>>>> I've just found a reference on the Smithsonian Institution's website
> >>>>> that the ARC Model D of 1929 was the first commercial navigation
> >>>>> receiver. See here:
> >>>>>
> >>>>> https://airandspace.si.edu/multimedia-gallery/14185hjpg
> >>>>>
> >>>>> Does anyone know the specs of this set? Did it cover the 200 to 400
> >>>>> kHz range only?
> >>>>>
> >>>>> 73,
> >>>>>
> >>>>> Jan SP5XZG
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