[Lowfer] 600MRG> OKAY; so maybe I need a loop

[dave.riley3]

Hi Andy,

Before you give up on the local noise, is it possible for you to e-probe the 
noise on a portable RX by walking away from the power lines into those woods 
until you run out of noise and then plant an e-probe there and feed it with 
cheap RG6 cable, decoupling along the way so as not to bring your house AC 
noise out to the antenna??
An e-probe driving your portable RX directly then with speaker noise 
rectified @ the output to a meter will tell you where that line noise goes 
away...

If you go loop, then best for a few turns tuned and inside a diameter like 
10' sections of aluminum down spout stock, all connected but @ the gap...
That will certainly kill the e noise plus give you two directions for deep 
nulling...

Good challenge, hope the Misses is OK...

Regards from Dave @ /17


----- Original Message ----- 
From: "Andy - KU4XR" <ku4xr at Yahoo.com>
To: "160 Meter Yahoo Group" <160M at yahoogroups.com>; "600 meter group" 
<SHMRG at piobaire.mines.uidaho.edu>; <lowfer at mailman.qth.net>
Sent: Thursday, July 08, 2010 12:55 PM
Subject: 600MRG> OKAY; so maybe I need a loop


> Well I did get the answer to my question on the sloper antenna, and it 
> evidently will be " as " noisy as the Windom dipole so that would be of no 
> help here. The consensus being; " I most likely need to use a loop "... 
> There is no free lunch, and I can't have something for nothing. I was 
> hoping to avoid the preamps, and bandpass filters and such, but it seems 
> that if I am to do any serious TA work; this is the direction I will have 
> to go. I have some 75 Ohm CATV hardline on hand. For managebility issues, 
> If I were to use a 50 foot ( 15 meter ) piece, formed into a circle; How 
> do I feed, and tune it from inside the shack ??? If I go this route; I 
> will mount it in a fixed position, just high enough to run a weed trimmer 
> under it, say, 3 to 4 feet off the ground. I want to be able to use it to 
> look for signals abroad on 160 meters, 600 meters, 1750 meters, and 2200 
> meters. This may not be optimum; but I want to do all tuning at the 
> operating position. Can
> this be done with respectable results ?? And would a run of RG-59 coax ( 
> BooKoo's on hand ) into the shack work ?? Probably about 50 feet... If I 
> am going to end up constructing an Interstellar Communications Array out 
> of this; from my recent reading, the K9AY setup looks like a good 
> performer, and not excessively difficult to construct. And it appears that 
> frequency resonance is set by the value of the terminating resistor.
>
> Again; I thank everyone for your insight; 73 to all :
>
>
> Andy - KU4XR - EM75xr - Friendsville, TN. USA
> LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 ) - Temporarily OFF
> Coordinates:  N:  35º 43' 54" - W:  84º 3' 16"
> http://www.myspace.com/beaconxr
>
>
>
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