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 Post subject: What is this?
PostPosted: Aug Wed 18, 2021 8:36 pm 
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Joined: Aug Wed 18, 2021 8:27 pm
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Hi all - I think this is the correct place for this (my first post - just saying).

I picked this up at the local flea market, but cannot identify it (beyond being an RCA), what it was used for, or if it is worth restoring / anything. I know it runs on batteries.

Can anyone shed some light on this mystery? I am attaching pics.

Thanks!

Ian


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 Post subject: Re: What is this?
PostPosted: Aug Wed 18, 2021 8:52 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 16995
Location: S. Dartmouth MA 02748-1225 USA
Welcome to ARF,

Stay a while...

A marine direction finding radio. When at sea out of sight of land, often used in conjunction with a navigational map that indicates station/beacon sources.

The marine radio/telephone band is no longer useful but there are still some stations present.

Very nice, has meter. Useful on land to find noise sources... There "should" be a long ferrite antenna rod nearly the length of the case.

Even though I live on Buzzards Bay these are not often seen...

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 Post subject: Re: What is this?
PostPosted: Aug Wed 18, 2021 8:57 pm 
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Joined: Jun Wed 08, 2011 2:33 am
Posts: 12347
Location: Ohio 45177
I would restore that one myself, if someone has schematics or data for it.

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Reddy Kilowatt says; You smell smoke? Sorry about that!


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 Post subject: Re: What is this?
PostPosted: Aug Wed 18, 2021 11:04 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3791
Location: Seattle WA US
Mid-late 1950's product. Notice the Conelrad markings in the AM broadcast band. May have been one of the last products introduced by RCA's Radiomarine division, as RCA began its exit from radio communications. May be a late vacuum tube product, an early transistor product or hybrid..... Please open it up and take photos.

Here's a website you may find interesting: https://www.angelfire.com/space/proto57/rdf.html
Not sure if its still active. Its owner might be very interested in your radio.

-Chuck K7MCG


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 Post subject: Re: What is this?
PostPosted: Aug Thu 19, 2021 12:09 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 39554
Location: SoCal, 91387
With apparently just a 4-1/2 volt power supply there's obviously no tubes, but it's rather all Transistor.
Looks like it also has a top mounted rotating housing, which would contain a ferrite bar antenna. As previously stated, the frequencies in the Marine band might yield some S/W, but the long wave Beacon band would be silent.

I've never seen another, and would also be interested if you consider parting with it. Definitely a candidate for cleaning up and replacing Electrolytic and any wax capacitors.

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 Post subject: Re: What is this?
PostPosted: Aug Thu 19, 2021 1:03 am 
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Joined: Feb Fri 13, 2009 5:09 am
Posts: 755
Location: Santa Clara, CA
It takes six "C" cells, so it could be 9 volts, or 4.5 volts if the two battery tubes are in parallel. I'd bet on the former. Also the label says "Transistorized". I don't see a place for a rotating attachment, just a meter on top. I'll bet there is a ferrite bar in the top of the housing, and the whole radio is rotated to maximum meter reading. Still, a very intriguing unit!


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 Post subject: Re: What is this?
PostPosted: Aug Thu 19, 2021 4:21 pm 
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Joined: Aug Wed 18, 2021 8:27 pm
Posts: 2
Thanks for all the information all. I normally stick to tabletop broadcast radios, with the odd SW thrown in. This one really stumped me, and I couldn't find anything on it.

You all really helped me - thanks!

Ian


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