[RFI] Towers/Antennas Near 138kV Transmission Lines

Rodger Devillier rcdevillier at gmail.com
Mon Aug 14 19:08:31 EDT 2006

It took almost a year to solve my problem dealing with HV lines.  In my
case, the lines were managed by a third-party and leased to the local power
company.   They shutdown a nuke plant to work on them (was scheduled
maintenance, not just for me).  The power company did their best to
accommodate me.  But it would have cost tens (if not hundreds) of thousands
to take an outage just for me.

Some say they don't have problems.  As I mentioned in an earlier email to
you directly, I think it depends on the hardware in use.  In my case, the
brackets holding the lines were arcing and had to be tightened / replaced.
Even still, within 1000' or so, the S-meter jumps at least two bars.  Only
the strongest DX signals would be copied.


On 8/14/06, Tom Rauch <w8ji at contesting.com> wrote:
> > I plan to operate everything from 160-2m with primary
> > interest being DX.
> >>From an RFI standpoint I have heard that such lines can
> >>actually be quieter
> > than residential distribution. True?
> Larry,
> In know a few people who live near lines like that and tell
> me they don't have problems. Every time I've been around
> lines like that I've had problems.
> In S. Amherst, Ohio I had problems with a 138kV line more
> than a mile from my house. My noise floor was about 10dB
> higher in that direction on dry days, and maybe 30 dB higher
> on wet days. I had a similar problem in Sylvania Ohio with a
> 69KV line on steel towers about 1/2 mile away. In Rockdale
> County GA a 345kV line about 3 miles away was a constant
> problem.
> I'm not saying they were terrible, just that there was a
> definite noise level increase.
> The real problem, IMO, is if you have a problem it takes an
> act of Congress to get something done. It is terribly
> expensive to work on those lines and they never want to take
> them out of service.
> I made it a rule to never live within five miles of a line
> like that.
> 73 Tom
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