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 Post subject: Insane building obsession continues!
PostPosted: Oct Sat 27, 2007 6:59 pm 
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Joined: Aug Wed 30, 2006 4:46 pm
Posts: 274
Location: Milwaukee, WI
Hello all!

Well, my obsession with building those vintage ARRL
1940’s receivers continues.

I’m afraid that I’ve become totally addicted!

Here are a few photo’s of my most recent concoction.

I’m posting the original photo’s from the ARRL handbook
In order to show the comparison between the original and my
reproduction, some 66 years later.

Once again, I’m impressed by the functionality of
these units!

(I really need to get on the air more with a homebrew
x-mitter!)

The ARRL original:
Image

My version:
Image

The ARRL original:
Image

My version:
Image

The ARRL original:
Image

My version:
Image

The ARRL original:
Image

My version:
Image

And, the schematic:

Image

I’ve got more photo’s to post for later :D

Cheers!

--Big Nick AKA KC9KEP


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 Post subject:
PostPosted: Oct Sat 27, 2007 7:22 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1932
Location: seabeck,wa. usa
Very nice. How's it work?


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 Post subject:
PostPosted: Oct Sat 27, 2007 7:55 pm 
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Joined: Aug Wed 30, 2006 4:46 pm
Posts: 274
Location: Milwaukee, WI
rickd,

It works *very* well, thanks :D

So far, I've only wound coils for 80 & 40m. It took a bit of
re-winding to get the 40m coil to target where I had
wanted them. (The 80m coils worked as described in the text.)

Most of the RF between the converter & oscillator coil are
mounted "above deck", supposedly so that one can receive
up to 60 Mc. (or, 60Hz :D )

I could not locate the original Miller permeability IF coils .. the
IF transformers that I've used are capacitively tuned, but seem to
work fine.

And, the BFO coil was scavenged out of an old Hammarlund
receiver, intended for 455kHz. I selected a few different capacitors
for the BFO and placed the coil into and abandoned IF can,
previously for IF.

This receiver's IF is at 1600kHz.

I can tune in SBB & CW very nicely.

The radio is intended to go down into the 75-154kHz range too.

But, I'll need to get around to winding more coils!

--Big Nick


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 Post subject:
PostPosted: Oct Sat 27, 2007 8:04 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7635
Location: San Jose, CA USA
That's some really nice work! Indeed, you'll have to build a transmitter to go with one of these.

How did you do the panels? A first-class panel job like that really makes the project look professional.

You are really reliving the glory days of amateur radio -- when home built gear of all kinds was at least as common as commercial stuff. Don't see much of that these days.

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Tom K6VL


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 Post subject:
PostPosted: Oct Sat 27, 2007 9:10 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 5919
Location: Burbank CA
That is a really nice "reproduction" and with a speaker. My kind of radio! I love your front panel.

I agree, you have to build a transmitter to match.


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 Post subject:
PostPosted: Oct Sat 27, 2007 9:17 pm 
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Joined: Aug Wed 30, 2006 4:46 pm
Posts: 274
Location: Milwaukee, WI
Thanks for the kinds words .. it’s a lotta work!

The front panel was made by using a CO2 laser engraver.

There are some photo’s of the process several threads back.

Here’s a couple more front panel shots:

Image

Image

Image

I did post a few pix of my transmitter a ways back. It’s not quite as vintage:

Here’s a link: http://www.bignick.net/images/RadioPix/ ... se_WEB.jpg

And a picture: Image


Actually, I was listening to an 80m net this AM. The guys were complaining that
the FCC wanted to dump the AM privileges on 80m and 160m. They were
comparing he change to the new TV broadcasting standard that will make most current
TV sets obsolete.

Great. Just when I start gearing up, the world gears down!
(or, vice versa!)

--Big


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 Post subject:
PostPosted: Oct Sat 27, 2007 9:22 pm 
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Joined: Aug Wed 30, 2006 4:46 pm
Posts: 274
Location: Milwaukee, WI
Woops!

Bad link to my transmitter page!

It should be:

http://www.bignick.net/Morgan_Radio/Radio_11.htm

Sorry de snorry,

--Big Nick


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 Post subject:
PostPosted: Oct Sun 28, 2007 1:56 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2753
Location: Gainesville, Florida
Looks like you got it-down and beautifully. Im just getting started on coils :shock:


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 Post subject:
PostPosted: Oct Sun 28, 2007 6:56 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3126
Location: WI
Nick-

Those are real works of art. I envy your craftsmanship . Your wiring is as neet as the schematic.

Kevin


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 Post subject:
PostPosted: Oct Sun 28, 2007 6:58 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 5528
Location: Cleona, PA
Nick, delicious-looking stuff. We are all insanely jealous!

Reece


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 Post subject:
PostPosted: Oct Sun 28, 2007 8:26 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7635
Location: San Jose, CA USA
Big Nick wrote:
The front panel was made by using a CO2 laser engraver.

There are some photo’s of the process several threads back.

For some reason, I can't find that one... Can you link it or give the title of the thread?

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Tom K6VL


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 Post subject:
PostPosted: Oct Sun 28, 2007 9:05 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 6180
Location: Minneapolis, MN USA
Probably means this thread:
http://antiqueradios.com/forums/viewtop ... 2b559e8f9a


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 Post subject:
PostPosted: Oct Sun 28, 2007 9:19 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7635
Location: San Jose, CA USA
Thanks! I didn't look quite far enough down the list...

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Tom K6VL


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