Re: [IRCA] Crystal radios

["Bob Young" <youngbob53@xxxxxxx>]

Hi Gi8l,

That looks like a nice radio you built there, the one tube superhet, very 
neat and clean looking. I think I saw one of your crystal sets before and it 
looked very complicated and radio-like if I remember right.
I'm taking the General tests at QRZ.com and am consistantly passing them. 
(It goes through the entire current question pool and if you miss some you 
can take the same test over again) The tests are 35 question like the real 
thing and there are 13 General exams in all to cover everything.  I'm using 
the ARRL General book for the math, I'm real rusty at that and never studied 
ham antennas anyway, it's interesting. I may move my test date up to the 
17th of February if I feel confidant I know all the stuff.

Bob

>From: "Gil Stacy" <gilstacy@xxxxxxxxx>
>Reply-To: Mailing list for the International Radio Club of 
>America<irca@xxxxxxxxxxxxxxxx>
>To: "Mailing list for the International Radio Club of 
>America"<irca@xxxxxxxxxxxxxxxx>
>Subject: Re: [IRCA] Crystal radios
>Date: Mon, 25 Dec 2006 16:15:23 -0500
>
>Craig,
>
>
>
>Here's an article by Mike Tuggle of Hilo, Hawaii, who, IMHO,  is the top 
>xtl
>set DXer in the world.   I've recently heard a sound clip of WWL 870 New
>Orleans that he recorded on his set in Hawaii.  My ideas on set 
>construction
>are without shame,  "lifted" from this article.  My front end antenna coil
>uses a 130 mh solenoid of 660/46 litz.  Mike uses a ferrite core/litz 
>combo.
>
>http://www.antiquewireless.org/otb/dxxtal.htm
>
>660/46 litz has been through experimentation by many determined to be
>without equal.  44 works, but 46 seems to be best for MW.  Unloaded coil Q
>exceeds at 1000. Hundreds of schematics and designs are at
>www.crystalradio.net   Home of the annual dx contest is at
>www.crystalradio.us  Photos and descriptions of competitive sets are in the
>photo album  including one by yours truly.  Lem Morrison's antenna tuner
>looks like a Collins RX.  My set has logged close to 400 MW stations from 
>my
>qth. We also have a one active device contest featuring regens and exalted
>carriers.  I didn't have this set ready for last year: my set was a one 
>tube
>regen which overloaded badly with my local pests. This one tube superhet
>design by Jack Bryant is superb and handles the locals like the superhet it
>is: http://home.bellsouth.net/p/s/community.dll?ep=87&subpageid=277688&ck=
>
>The schematic is in Jack's One tube folder.  This stuff can hook you deep 
>if
>you are not careful, which is probably just what you wanted to hear. <g>
>
>
>
>73, Gil NN4CW
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