[aclug-L] Re: Non-Linux Question: RF Interference?

[Michael Holmes <maholmes@xxxxxxxxxx>]

The following advice is based on A) you are competant around high voltage, or
B) you can get someone who is.  

1st and cheapest check the ground rod at you electrical service.  make sure it
is properly routed and connected to your service.  In a lot of cases, the phone
and electrical tie back to the same ground rod (not proper, but common
practice.  Each should have its own ground)

2nd check for loose connections inside your electrical service.  With you
mentioning about it being worse at night, you might first check the circuit
which most the lights are on, especially a flaky circuit breaker (which would
hum if at the limit of tripping )

3rd you did not mention what was close to your geographic area.  If you are up
high on the terrain, look for towers close which might be bleeding

Again please be careful around the high voltage, anything over 24 volts has the
potential of serious bodly harm and or death.

Michael

On Sat, 25 Mar 2000, you wrote:
> RF Interference.
> 
> For about four years I have been trying to track down what might be causing
> interference in my home entertainment and phone system and ever so often I
> get so frustrated that I post in a newsgroup to see if I might get a lead on
> how to track down {with proof if outside of my home!} what might be causing
> this interference.
> 
> THE EFFECTS:
> <A> I have this 'BUZZ' that is in 'BOTH' of my phone lines 'IF' the phones
> are corded phones (can not be heard on the cordless phones!). Some days can
> almost hear voices in the phone in the southwest corner of my home.
> <B> Can be seen as large white specks on VHF channels 3 & 12 and as a 'white
> and black' line moving slowly from the bottom to the top of the screen on
> UHF channels 27 & 29 that I create in my home with a consumer grade home
> modulator. (Sony MRDD1 made by ChannelPlus)
> <C> Some days I can pick-up a local FM station that broadcasts in the 80's
> on VHF channel 4.
> <D> There are some areas of the home where you can not use a 900mhz cordless
> phone that is no where near home electronics. Like at the front door.
> <E> I get a 'HUM' from two different power strips in two different rooms on
> two different breakers.(changed strips <brand and style>, and devices
> plugged in) the power LED would at times 'FLASH' with no device plugged in!
> <F> I have this little 'Soothing Sounds' electronic sleep aid [work 3rd
> shift, helps mask traffic noise] that 'HUMS' when no sound is chosen... the
> worse the 'EFFECTS' on the other devices are the louder the 'HUM'.
> 
> <1> When it snows the interference goes away!!
> <2> The interference goes away sometime when it rains very heavy!!
> <3> The interference seems to be least between the hours of 7am till noon.
> <4> The interference seems to be the worse between the hours of 6pm till
> 6am. peaking around 10pm.
> 
> I have had both KG&E and SWB out, but wouldn't you know it when the service
> techs show up the interference goes away!! [only during the day time]
> 
> Using the 'soothing sounds' box found that the 'HUM' is in the power line
> ONLY goes two house to the west and one house to the east and the houses to
> the north and south are on different transformers and do not have the 'HUM'
> 
> KG&E did scope some 'strange' sine wave in my power line one day, but when
> they moved to the pole the wave was gone. And a hand held RF signal tracker
> did not pick up anything?!?
> 
> Any ideas or know of any devices that I might be able to rent (cheaply) that
> can help me track this interference down?!?
> 
> I have tried a number of different consumer grade traps, both RF and AC, to
> try to trap out the interference with no luck.
> 
> David E. Carmichael
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Michael A. Holmes

You have not failed until you give up!

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