RadioBanter - View Single Post

May 14th 06, 10:49 PM posted to rec.radio.shortwave

In article ,
dxAce wrote:

Telamon wrote:

In article . com,
wrote:

Since T-storm seanon is here, and I have ripped my radio room to
shreds, I am reduced to operating from a portable for a few weeks
while we rebuild, and rewire the room.

In between the recent storms I noticed a new RFI source. A reoccuring
crackle. While we found the source, fuse on the input to the power
transformer of the house next door, I decided to do some additional
research on power line noise.

I found a gold mine worth of data on the ARRL page. For those facing
power line QRM a little study could be a big help in resolving the
problems.

http://www.arrl.org/tis/info/powerline-FAQ.html

Two sections were very informative:

http://www.arrl.org/tis/info/HTML/power_line_handbook/ This shows
the "correct" way to do a line noise RF hunt. Even though I can't
afford the tools, it does show the "how".

And since I can't afford that...

http://www.arrl.org/tis/info/pdf/099252.pdf

I had been thinking of designing something similar, but why re-invent
the wheel. I built one using a Radio Shack Pro16 scanner and tested
it around or sub-division. The RECC people are going to get real
tired of me. I have already found several very noisy "poles".

Again please feel free to enjoy or ignore.

I've used a portable AM radio using the internal ferrite antenna nulls
to point the way to noise sources.

I do something like that as well, then I call the power company and they bring
out their $5000 + little receiver and yagi antenna and pinpoint the exact
source.

No problems here at the moment.

A Yagi would be a good antenna choice with high gain in one direction
only. I guess the power line noise is very broad band and a small Yagi
could pinpoint the problem.

--
Telamon
Ventura, California