RE: [amsat-bb] MODE A LOOP

["Kevin Muenzler WB5RUE" <wb5rue@xxxxxxxx>]

I use a loop too, occasionally, for RS reception with 
very good results.  I also have a pair of inverted V 
antennas that are 90 degrees out.  The system is a 
fiberglass pole with the two inverted V antennas as 
guys.  I use sections of RG-6 for matching to the 50 
ohm line.  It works just as good as the loop although 
it is a bit more complicated to make and match.  It 
is a bit better when the sat is near the horizon, one 
or two S-units.

Kevin, WB5RUE

> -----Original Message-----
> From: owner-AMSAT-BB@amsat.org [mailto:owner-AMSAT-BB@amsat.org]On
> Behalf Of Daniel R Messano
> Sent: Tuesday, January 12, 1999 9:51 AM
> To: amsat-bb@AMSAT.Org
> Subject: [amsat-bb] MODE A LOOP
> 
> 
> I put up a horizontal loop for mode A several days ago, and WOW!
> 
> I have been using loops for terrestrial work for quite some 
> time now, and
> they work great.  Why I didn't think of putting one 
> horizontal for 29.4
> until now, I don't know.  
> 
> Thanks to the person who posted about it, around a week ago.
> 
> I live with my parents, and they don't favor antennas much!  I decided
> that my ceiling would certainly accept the dimensions of this loop. 
> Being a somewhat experienced drywaller, I decided any screws 
> or nails in
> the ceiling would be easily patched up, so I went to It.
> 
> I used 22 gauge wire stripped from a multi-pair cable.  Cut 
> it using the
> 1005/f formula.  Soldered the ends, and attached it to some RG-59.  I
> have lots of RG-59, and have used it before on recieve only 
> antennas with
> success.  
> 
> I put some standard thumb-tacks at the corners, and halfway down each
> side to hoist it up.  The thumb-tacks were not pushed in 
> tight, to allow
> me to tense the ends, and square them up.  I replaced the corner
> thumb-tacks with RG-59/RG-58 style cable clips.  I figure the 
> antenna to
> weigh about 8 ounces, so the extra long nails just help keep 
> tension on
> it, and will be less prone to bending, like thumb tacks.  I 
> ran the RG-59
> to a corner, and down the wall.  I secured the RG-59 at the feedpoint,
> and several times until I got to the corner.
> 
> Total cost: If I had to buy everything, about $3 for cable, 
> and a couple
> of bucks for the wire from  Rad shack.  Oh, and $2 bucks for 
> cable clips,
> $.50 for thumb tacks, $2 for solder, etc. :)
> 
> Results: My first ever reception of RS-13!  With a good overhead pass,
> sigs were S-5 to S-7 on my HR-2510.  I switched to my vertical dipole
> (which is hidden in a tree outside) at various phases of the pass, and
> heard very little. My next test will be RS-15.   
> 
> Thanks for the idea, to whoever posted it, and I hope this 
> variation may
> help some apartment dwellers, or others with restrictions.
> 
> Question:  Did I see somewhere that RS-10 is non-operational?
> 
> BTW If you use white 22 gauge wire, white RG-59, white cable 
> clips, and
> white thumb-tacks, the XYL or parents will hardly notice it! 
> 
> 73, de Danny
> 
> KE4RAP@juno.com
> 
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