[HCARC] Antenna question

[SARA SANDSTROM]

Harvey, 

One of my neighbors has an electric fence.  It just surrounds his house so it isn't more than a few hundred meters long.  He is about half a mile from me.  The electric fence generates a pulse at about a 1 Hz rate that is quite short.  I can hear it on 40 mand 80 m and mainly at night.  I don't think he runs it during the day time.  It isn't really very obnoxious at all.  I believe that most if not all electric fence chargers are about the same.  

Kerry  

m: "Harvey N. Vordenbaum" <tower2 at stx.rr.com> 
To: rowen at owencomps.com, hcarc at mailman.qth.net 
Sent: Saturday, July 13, 2013 8:54:44 PM 
Subject: Re: [HCARC] Antenna question 

There are many sources of noise to get into radios.  If it has a 60/120 Hz 
component it is electric line noise related.  Neighborhood distribution 
lines are notorious for generating noise due to bad connections, components 
breaking down, etc.  And many things operating off line power can make noise 
too, motors, thermostats in heating pads, etc.  Old TV sets radiated 
harmonics of 15755 Hz from the horizontal output transformers driving the 
CRTs.   
I don't have any experience with electric fences, but I wonder if they 
couldn't make noise with those miles of wires attached.  What happens when a 
blade of grass is in contact with a charged wire? 
Of course now there is a new world of possible sources with digital cable, 
computer  and TV signals all over the place. 
Where to start?  Turn off things in your house as much as possible. Go 
around with a transistor radio tuned to the high end of the AM broadcast 
band with the volume turned up.  The magnetic rod antenna used makes a 
fairly directional antenna you can point at  the source.  Hold it up to the 
entrance panel and where your phone and cable line come into the house and 
hear if it is there.  I'm sure there will be some as I have. 
Right now I have a noise source that repeats at 18 kHz intervals across the 
10 and 12 M bands.  It  is worse when my beam is pointed at the neighbors 
house, but that happens to be in line with my house too.  I haven't bugged 
them about it yet, especially since they haven't complained about my big 
tower.  But sometime when they are out of town I'll have to snoop around 
their house. :-) 
Too bad I don't have the mobile HF setup anymore so I could drive around the 
neighborhood and listen too. 
Good luck 
Harvey 
K5HV 


-----Original Message----- 
From: hcarc-bounces at mailman.qth.net [mailto:hcarc-bounces at mailman.qth.net] 
On Behalf Of rowen at owencomps.com 
Sent: Saturday, July 13, 2013 7:00 PM 
To: hcarc at mailman.qth.net 
Subject: [HCARC] Antenna question 

I have a multiband dipole tuned to 1.1:1 on 10m.  I have noise to s8.  In my 
truck I have s3.  Any ideas on reducing the noise? 

Ray owen Kf5vnc 
830.998.0914 

Sent from my Verizon Wireless 4G LTE Smartphone 

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