[ARC5] 1930 Aircraft Radio Corp Aero Digest Ad (Model D)

[Raymond F Chase]

Folks,

The model D in 1930 was preceded by the Aircraft Radio model B in 1929 that used a tube line up of : 222-222-222-240-112A.  The 222 was the newly released screen grid tetrode.  The model D released in 1930 used four 224 tetrodes as RF amps and tuned detector plus the 227 audio amp.  Actually the model B was designed at Radio Frequency Labs (RFL) the parent of Aircraft Radio.  At the time ARC did not have manufacturing capability nor proper patent licenses hence ARC used Stromberg Carlson as the manufacturer.  The Mid Atlantic Radio Club (MAARC) in May 2016 published an article on this history leading up to the RU series and SCR-183/283 series radios.

Ray

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Dave Merrill
Sent: Saturday, September 12, 2020 3:02 PM
Cc: ARC-5 <ARC5 at mailman.qth.net>
Subject: Re: [ARC5] 1930 Aircraft Radio Corp Aero Digest Ad (Model D)

 

I always wondered about the relationship between A.R.C and S-C and this ad helps clear it up.

 

Dave

N9ZC

 

 

On Sat, Sep 12, 2020, 10:52 AM Al Klase <ark at ar88.net <mailto:ark at ar88.net> > wrote:

Hi Mike,

That was my suspicion, but I couldn't prove it.  Thanks for the reference.  If others need to grab that from ARRL the title of the article will help:  "A Multi-Range Receiver With Four Tuned Circuits By Robert S. Kruse"

Also the add scan in the Ebay listing is quite high quality, and worth a "save image as."

BTW, the 24's were screen-grid tubes (tetrodes) providing a lot more gain that triodes.

Thanks,
Al

On 9/12/2020 12:29 PM, Mike Morrow wrote:

That's the famous Stromberg-Carlson Model D TRF receiver that covers 235 to 8000 kHz with appropriate coil sets, A2/A3 only.  It has three RF Amps, Detector, and an AF stage.  The AF stage is a type 27 and other stages are type 24.  All are triodes. 

 

An detailed five-page article on this set is in October 1930 QST, page 21 to 25.  The article includes internal photos and a schematic.

 

The Model D is the original commercial set from which the USN's RU-/RAJ series of receivers (17 different varieties) and the US Army SCR-Ax-183/-283 receivers (19 different varieties) were developed up to 1942.

 

The Model D was an important development.

 

Mike / KK5F

 

-----Original Message----- 
From: Dave Merrill 
Sent: Sep 12, 2020 9:03 AM 

Has anyone ever seen one of there sets? 

 

https://www.ebay.com/itm/363060364458

 

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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
 

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