[RFI] Old RFI back and a new one help please

[donovanf at starpower.net]

Rick,

Before you invest time searching for the RFI outside your home, you should be certain that its not originating from inside your own home.  You don't have to introduce a new device for RFI to originate from your home, RFI can be caused by many chenges that can heppen to your existing devices and infrastructure.

Shut off all of the breakers except the breaker feeding your radio, and don't forget to turn off all UPSs too.  If the RFI is still there, then you know you're ready to look outside your home.

73
Frank
W3LPL



---- Original message ----
>Date: Wed, 26 Jan 2011 09:05:59 -0800 (PST)
>From: Rick Scott <w7psk at yahoo.com>  
>Subject: Re: [RFI] Old RFI back and a new one help please  
>To: "Battles,Richard" <Battles.Richard at lee.k12.al.us>, "rfi at contesting.com" <rfi at contesting.com>
>
>Well I have not added a power supply here.
>
>All our lines are underground until the top of the hill.  Would that make a 
>difference>
>
>
>
>
>----- Original Message ----
>> From: "Battles,Richard" <Battles.Richard at lee.k12.al.us>
>> To: "rfi at contesting.com" <rfi at contesting.com>
>> Sent: Wed, January 26, 2011 8:34:01 AM
>> Subject: Re: [RFI] Old RFI back and a new one help please
>> 
>> Scott, this sounds like a switching power supply in you home, or near you from 
>>a  neighbor.  switching power supplies sound like a buzzsaw.  the rfi  from the
>> supply will be conducted into the house wiring, then into the power  lines from 
>>the power company.  the rfi will not go past the transformer, on  the pole, but 
>>will flow
>> into the ground system of the power system.
>> 
>> a  common mode choke will most likely fix the  problem.
>> 
>> richard
>> wb4byq
>> 
>> ________________________________________
>> From: rfi-bounces at contesting.com [rfi-bounces at contesting.com] On  Behalf Of 
>>Rick Scott [w7psk at yahoo.com]
>> Sent: Wednesday, January  26, 2011 10:00 AM
>> To: rfi at contesting.com
>> Subject: [RFI] Old  RFI back and a new one help please
>> 
>> The noise I talked about a while ago  is back.  It was a blissful 2 weeks 
>>without
>> it.
>> But last night It  showed up again.  This bites.  Ive got the ARRL sending me  
>>a
>> helpful
>> gent soon.  He isn't available right now due to family  issues but I'm sure he
>> can help.
>> 
>> Ive got a new one that showed up too  that's really strong.  Hopefully some 
>>have
>> heard it.
>> 
>> 
>> Its a  buzzsaw sound that lasts for 1 second and cycles every 6 seconds.   So
>> every 6 seconds
>> I get 1 second of extremely strong  buzzsaw.
>> 
>> 
>> 
>> 
>> Whee I love city living.
>> 
>> Scotty  W7PSK
>> 
>> 
>> 
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>
>
>      
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