Re: Random wire antenna.

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Tony Meloche

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Jan 11, 2005, 7:38:41 PM1/11/05

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helmsman wrote:
>
> What is the easiest way to quiet a random length indoor-outdoor, vertical-horizontal
> antenna down.
>
> TIA

Make sure you have a good impedence match to your receiver, make sure
you have a good solid outdoor ground from said receiver, and try to find
out by process of elimination what in or around your home is generating
extraneous noise - shut if off while listening, if that's feasable.

All of that may/might help some, but not as much as you are hoping for.
Longwire antennas will inherently pick up noise, period. Loops are much
quieter, but overall don't have the same signal pulling ability.

Tony

The Axelrods

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Jan 11, 2005, 6:32:21 PM1/11/05

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You could try something like the LIM.

http://www.angelfire.com/mb/amandx/lim.html

That URL has info that may be of use

Shawn

"helmsman" <helm...@mindspring.com> wrote in message
news:8sl8u0thmf5ue57eu...@4ax.com...

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RHF

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Jan 12, 2005, 7:21:21 AM1/12/05

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HELMSMAN,
.
You may wish to read these Messages:
.
Antennas - Five Things to Consider : Antenna, Balun, Ground,
Coax & Planning
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1544
.
The 'simple' Answer (in most cases) is the Low Noise Inverted "L"
Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1785
.
Converting a Random Wire Antenna to a 'Low Noise' Inverted "L" Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1766
.
Make your 'basic' Inverted "L" Antenna a Low Noise Inverted "L" Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1717
.
Basic Antenna ? -and- Better Antenna ?
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1135
.
CONSIDER BUILDING A "LOW NOISE" ANTENNA:
.
Try building an Improved SWL Random Wire Antenna that uses a
9:1 Matching Transformer (Balun / MLB) then you may not see
any real 'improvement' in your receive signal.
.
This is the so called "Low Noise" SWL Antenna.
.
Three "Must" Links to Read -wrt- Low Noise SWL Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/949

[ Please READ These Three Links ]
http://www.anarc.org/naswa/badx/antennas/low-noise_antenna.html
http://www.anarc.org/naswa/badx/antennas/SWL_longwire.html
http://www.anarc.org/naswa/badx/antennas/grounding.html

ABOUT THE "LOW NOISE" ANTENNA 'DESIGN CONCEPTS':
* A Random Wire Antenna Element coupled via a
* 9:1 Matching Transformer at the Near-End of the Antenna with a
* Good 'earthen' Ground Rod and Wire
* Coax Cable Feed-in-Line to the Receiver.

This is the basic SWL Antenna that uses the "Low Noise Antenna"
'design concepts' that were {popularized} by John Doty.
.
.
iane ~ RHF
.
All are WELCOME at the Shortwave Listener (SWL) "Antenna Ashram"
<http://groups.yahoo.com/group/Shortwave-SWL-Antenna/>
.
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/502
.
I BELIEVE: On A Clear Night . . .
You Can Hear Forever and Beyond, The BEYOND !
.
With the a Shortwave Listener SWL Antenna of your own making.
[ If You Build It {SWL Antenna} You Will Hear Them ]
.
.

Steve M

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Jan 13, 2005, 2:26:11 PM1/13/05

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On Tue, 11 Jan 2005 22:50:18 GMT, helmsman <helm...@mindspring.com>
wrote:

>What is the easiest way to quiet a random length indoor-outdoor, vertical-horizontal
>antenna down.
>
>TIA

I started out with a DX-398 and by the time the wire had grown to 100'
the noise and overloading were bad. Running the wire through a
grounded ICE 180 transformer greatly reduced the noise and I was able
to add another 20' of wire w/o overloading.