Re: [IRCA] Antenna experiment
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Re: [IRCA] Antenna experiment



I made a new loop antenna today, and initial results are very encouraging.
It's getting dark with a thunderstorm approaching, so I ran out of time.

A version of the antenna can be seen most of the way down this page:
http://www.stormwise.com/page3.htm

I bought four 10' lengths of 3/4 copper tube and four elbows.  Set it into a
square and soldered seven of the eight joints.  I have a tuner I made years
ago using a toroid and air variable capacitor, and an output link of a few
turns.  The copper tube was slipped through the toroid, and a coax run to my
truck radio through an adapter.  Tuned to a few stations and could get stuff
totally inaudible on the normal truck antenna.  For example, the 640 station
near Springfield, MA was not heard on the whip.  With the loop setup it was
listenable with some noise from adjacent WPRO which is a 5kw non-d local.

If I have time tomorrow, I'll do some further work.  I hope to use a second
toroid and see if I can link couple to the loop with the tuner next to the
radio.  I also want to put it in the clear and see how well it nulls.

We shall see!

Craig Healy
Providence, RI

And then you'll build one for those of us on the list who are technically 
challenged and ship it to us at a nominal cost...

=0

Bert New
Watkinsville, Georgia
Proudly Serving You Since 1964!



<BLOCKQUOTE style='PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #A0C6E5 
2px solid; MARGIN-RIGHT: 0px'><font 
style='FONT-SIZE:11px;FONT-FAMILY:tahoma,sans-serif'><hr color=#A0C6E5 
size=1>
From:  <i>&quot;Craig Healy&quot; 
&lt;bubba@xxxxxxxxxxxxxxxxxxxx&gt;</i><br>Reply-To:  <i>Mailing list for the 
International Radio Club of America&lt;irca@xxxxxxxxxxxxxxxx&gt;</i><br>To:  
<i>&quot;Mailing list for the International Radio Club of 
America&quot;&lt;irca@xxxxxxxxxxxxxxxx&gt;</i><br>Subject:  <i>[IRCA] 
Antenna experiment</i><br>Date:  <i>Sat, 17 Sep 2005 19:01:53 
-0400</i><br>&gt;I made a new loop antenna today, and initial results are 
very encouraging.<br>&gt;It's getting dark with a thunderstorm approaching, 
so I ran out of time.<br>&gt;<br>&gt;A version of the antenna can be seen 
most of the way down this 
page:<br>&gt;http://www.stormwise.com/page3.htm<br>&gt;<br>&gt;I bought four 
10' lengths of 3/4 copper tube and four elbows.  Set it into a<br>&gt;square 
and soldered seven of the eight joints.  I have a tuner I made 
years<br>&gt;ago using a toroid and air variable capacitor, and an output 
link of a few<br>&gt;turns.  The copper tube was slipped through the toroid, 
and a coax run to my<br>&gt;truck radio through an adapter.  Tuned to a few 
stations and could get stuff<br>&gt;totally inaudible on the normal truck 
antenna.  For example, the 640 station<br>&gt;near Springfield, MA was not 
heard on the whip.  With the loop setup it was<br>&gt;listenable with some 
noise from adjacent WPRO which is a 5kw non-d local.<br>&gt;<br>&gt;If I 
have time tomorrow, I'll do some further work.  I hope to use a 
second<br>&gt;toroid and see if I can link couple to the loop with the tuner 
next to the<br>&gt;radio.  I also want to put it in the clear and see how 
well it nulls.<br>&gt;<br>&gt;We shall see!<br>&gt;<br>&gt;Craig 
Healy<br>&gt;Providence, 
RI<br>&gt;<br>&gt;<br>&gt;_______________________________________________<br>&gt;IRCA 
mailing 
list<br>&gt;IRCA@xxxxxxxxxxxxxxxx<br>&gt;http://dallas.hard-core-dx.com/mailman/listinfo/irca<br>&gt;<br>&gt;Opinions 
expressed in messages on this mailing list are those of the original 
contributors and do not necessarily reflect the opinion of the IRCA, its 
editors, publishing staff, or officers<br>&gt;<br>&gt;For more information: 
http://www.ircaonline.org<br>&gt;<br>&gt;To Post a message: 
irca@xxxxxxxxxxxxxxxx<br>&gt;<br></font></BLOCKQUOTE>


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