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Re: [TowerTalk] Yet another radio interference!

To: WW3S <ww3s@zoominternet.net>
Subject: Re: [TowerTalk] Yet another radio interference!
From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
Date: Mon, 15 Jun 2009 21:38:14 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

WW3S wrote:
>  S video from a satellite dish, I had the same problem with my 
> neighbor....if he unplugged the S video cable from the satellite recevier, 
> noise went away....reconnected S9 noise, with the peak around 6.9 mhz....
>   
In the shop I have a satellite receiver sitting above the PS for my Icom 
756 Pro. which is immediately to the left of the rig.  I use the S-video 
from that receiver into a quad core AMD just to the left of the PS.  
There are three CAT 6 cables for a Gigabit network into a patch panel 
behind the PS.  So far there is no problem on any band  1.8 through 440 
MHz.  Currently the two main bands I operate are 40 and 6-meters.

In the house I am running the component leads into an S-video converter 
into the computer right beside this one.   So far, no problems with that 
one either.  The satellite receivers are a DISH HD receiver in the house 
and an SD receiver in the shop, both connect to the dish on the tower 
with the RG-6 running in the same conduit as the LMR-600.

So, now I'm going to have to cross my fingers and hope nothing goes 
wrong with this setup. <:-))

73

Roger (K8RI)
>
> On 6/15/2009 11:55:07 AM, Luciano Nachif (luciano_nachif@yahoo.com) wrote:
>   
>> I installed a 40 meters Cushcraft 40-2CD 2 elem. yagi on a 125 foot tower
>> by May 2nd.
>> On first few days it sounded like a dream. Noise was around S3 and no
>> interference whatsoever.
>>
>> Some days after installation, I noticed that I could hear a 3KHz bandwidth
>> noise every 24 KHz on the entire HF band, night or day time (24 hours a
>> day). Strongest noise was around 6,8 to 7,1 MHz despite antenna or radio.
>> ( I also performed some tests with a Sony portable radio ICF-7600GR set 
>> for
>> LSB)
>>
>> On the next weekend, when I came back home, the interference was gone. For
>> 18 days in a row no intereference showed up. Everything was pretty good.
>>
>> Ten days ago, it came back and it is a S-7 to S-9 depending where the
>> antenna points to.
>>
>> I decided to go for a walk around the block and noticed that the noise
>> is either on the power lines and/or cable telephones. It starts 100 feet
>> before and 200 feet after my house main gate.
>>
>> When scannning from 1MHz to 30MHz, it peaks around 6,8 to 7 MHz.
>>
>> If there's anyone on this list that can help me, please, do so!
>>
>> I appreciate your help!
>>
>> Best regards,
>>
>> Luciano PT9KK
>>     
>
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