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 Post subject: Re: SW Crystal Set.
PostPosted: Thu Sep 01, 2011 4:50 am 
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Joined: Sat Nov 04, 2006 3:48 am
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Location: Western Washington State
There has been lots of requests and talk of SW crystal sets, recently.

Here is a set that I used to make similar kits of. This fellow was very
happy for me to make kits of this set, as I had asked him, personally.

This SW set works quite well, and please take note of the detector
section, being similar to the "Tuggle Design". I consider the Tuggle set
to be the "state-of-the-art" crystal radio design. Lots of thought and
design work, there. Hard to beat that design, for certain!

If you wish to store these, and print them, Right click on each, file, and
re-size in a photo-editor, and print. . .Voila!

Enjoy!

Image

Image

Image

Mike

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 Post subject:
PostPosted: Thu Sep 01, 2011 11:49 am 
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Location: South Florida
Interesting set, Mike. The article may be downloaded in PDF from
http://schematicsforfree.com/archive/file/Radios%20&%20RF%20Circuitry/Receivers/Ocean%20Spanning%20Crystal%20Receiver.pdf

It's a little more legible than the JPGs.

73,

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 Post subject:
PostPosted: Fri Sep 02, 2011 6:10 am 
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Location: Western Washington State
Jim,

Thanks for posting that link, I wasn't aware of this.

This is a neat way to share these types of files.

I registered there, and said it was successful, but when
I tried to log-in, it failed.

I see there is a transistion happening there, and is there
a problem that I need to resolve, so I can log-in?

I would like to be a contributer to this site. . .Any suggestions,
and pointers, would be welcomed.

Thanks!

Mike

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 Post subject:
PostPosted: Fri Sep 02, 2011 1:00 pm 
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Joined: Mon Feb 05, 2007 2:51 pm
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Location: Corona, CA
Mike and Jim,

Thanks for posting the article and link. It looks familiar. Mike, did you do the kit for Yeary Communications? I recall that they sold the plans for all of their kits for a nominal price (this was before the internet and .PDF files), so I bought the plans for their shortwave crystal radio. I still have it, somewhere. I'll have to try to dig it up.

It looks like an interesting set. What were you able to pick up with it at your location?

Thanks,
George


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 Post subject:
PostPosted: Fri Sep 02, 2011 4:11 pm 
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Joined: Tue Jan 04, 2011 1:52 am
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Location: Toronto
Thanks folks!

I'm more into simple tube and transistor sw radios, but I still have a soft-spot for the crystal radios I made as a kid, and this project looks too interesting not to try. :)


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 Post subject:
PostPosted: Fri Sep 02, 2011 4:36 pm 
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I did do all of Yeary's kits, and that SW set was the first.

He had done them previously, and I was more capable
of bringing them into a more professional look and operation.
This was mostly due to my shop, and capabilities that Jim didn't
have access to. He was a great guy to work with, and really
enjoyed that time of my kitting experiences.

As far as what I picked-up on the set was a long time ago,
and really don't remember. Seems like the BBC, and so-on was
there. I do remember that it did perform well, with my two-
torch-handicap. Also, living on the west-coast is kind of
a handicap too, as it looks like the "easterners" do SW easier,
on a crystal set.

Howard Lash did a nice job in the design of that set. He was a real neat
guy to talk to, and hope he is still with us, enjoying the hobby, as we all
do.

Hope this helps you people have that much-more fun. . .

BTW: That first variable for the ant-tune, can be switched,
fixed capacitors of around 10-pf to 100? Experiment.
I did one with a "gimmick" capacitor there, and it worked great.

Mike

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 Post subject:
PostPosted: Mon Sep 26, 2011 3:44 am 
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Members,

Received a real nice e-mail and thank you from Howard Lash,
the author of the originals Pop-Tronics, 1981 article.

He sent me some real nice photos of the original prototype
of the this, very-well-working crystal SW set.

Thank you, Howard!

Image

Image

Mike

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 Post subject:
PostPosted: Mon Sep 26, 2011 10:04 am 
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Joined: Thu Nov 23, 2006 4:19 am
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Location: Boston, MA
Hey Mike and All,

NICE!

I always loved this set and had LOTS of fun w/ my original copy (sadly long gone).

K


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 Post subject:
PostPosted: Mon Sep 26, 2011 8:45 pm 
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Krys,

Glad he sent these real nice pictures.

This set has always worked well, and have built
several variations of it. SW is not so easy at my
place, but this is one set that has come-through,
nicely.

Enjoy!

Mike

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 Post subject:
PostPosted: Tue Sep 27, 2011 12:44 am 
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Location: Michigan
Interesting, Thanks for posting this Mike !
Dan


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 Post subject:
PostPosted: Thu Sep 29, 2011 6:38 pm 
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How critical are the two variable capacitors? I've been thinking of building a copy of this but those exact caps look to be very hard to find.

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 Post subject:
PostPosted: Thu Sep 29, 2011 8:35 pm 
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Dennis,

See PM. . .Variables are very forgiving, in this set. . .

Mike

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