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Subject: Re: Why is the home voltage so high ?
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
Date: Thu, 03 Oct 2002 21:22:20 GMT
NNTP-Posting-Date: Thu, 03 Oct 2002 21:22:20 GMT
Organization: AT&T Worldnet
Thanks for the detailed post.
I believe you might be on the right track. I have been observing this over a
'long' period of time and have come to the same type of conclusions.
However, I do not have access to scopes and RF meters at the moment. How
could a radio be conclusive ? It does show chatter between stations, but
that could be anything, not necessarily proof of power line modulations (?).
There are lots of gizmos nowadays that are being used for video, audio,
cellular, satellite, infrared-remotes, locally-broadcast-dvds, etc. In
addition, due to the present climate of suspicion/alerts/etc, I believe
there are lots of equipment being field tested. You must have heard news of
Xray scanners and such being manufactured in large quantities, etc.
Similarly, many others things (microwave, towers, transmitters, etc.) seem
to be happening without much fanfare outside public reviews.
"milne_v" wrote in message
> "News2020" wrote in message
> > I measured the voltage at the power outlets at home and found it to be
> > to 140 V.
> > This is way beyond the expected range (110-120) ?
> Do you have access to a scope? If yes then scope the mains, use a step
> down transformer if you don't feel comfortable working at mains
> Look for narrow spiked transients on mains sinewave. Could be at zero
> crossing, could be elsewhere. If they are there, then these transients
> can easily be the source of many of your problems. Make sure that
> triac dimmers and inductive motor alliances in the home are off at the
> time. If you find transients then move on to the homes grounding
> system and scope a grounded metallic structure using an external
> ground stake as a grounded referance. If transients also appear on the
> homes grounded structures, then you have identified at least part of
> your problem. Don't confuse the transients with power line
> frequencies. They will produce very broad band RF. If they appear on
> grounded structures with triacs and motors shut off then I doubt
> whether the source is within the home. These transients can and will
> produce nasty resonant harmonics in operating appliances. Should they
> appear on grounded structures then you can assume that whatever is
> producing them is not a toy. It's probably a high powered source in or
> around your home that encorporates some type of high powered arc
> discharge or some high powered line switching device. You can also use
> a computer with sound card, a program such as "cool edit" and some
> shielded cable with the appropriate plugs to record the grounded
> structures signals with no danger and then analyze the waveform
> looking for the same type of thing. Should these transients be present
> then it's safe to say that they don't belong there. Should transients
> be present then they will probably produce RFI harmonics that are
> easily picked up on the lower end of a portable AM radio. If you get
> as far as finding the RFI on the radio, then use the radio to check
> for sources in and around your home such as your hydro meter and
> neighbouring hydro meters. This can be used to determine if the
> problem is specific to your neighbourhood or specific to your home.
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