Hi Tom (et al)--
My suggestion is that, instead of spending a fortune trying to eliminate
noise at your station, you first try to eliminate it at its source. This
can be easier than you might think. High voltage transmission lines should
be quiet if properly installed and maintained.
I wrote down some similar problems and solutions that we have found over the
years. Perhaps some of what we have done will be of help to you. You can
find it at http://home.naxs.com/n4tn/noise.html
My friend's website where that is posted is at http://home.naxs.com/n4tn/
He is N4TN - I am N4NT -- those are not typos!
Very good luck to all.
Mike N4NT@wireco.net
----- Original Message -----
From: Tom Scott <tscott@eni.net>
To: 'Ten-Tec Users Reflector' <tentec@contesting.com>
Sent: Wednesday, April 28, 1999 12:48 AM
Subject: [TenTec] Power Line QRN?
>
> A warning that this is a bit long-winded... please bear with me... I'm
> curious to get some feedback...
>
> Now that I have finally gotten my Omni V operating better and greatly
> improved my antenna deployment, I finally can see what has given the Omni
V
> its reputation for being a "great set of ears". My best antenna is a
> G5RV-length dipole fed with ladder line from a Johnson Matchbox. This
> antenna is sloped between thirty feet and seventy five feet off the
ground.
> I'm getting wonderful sensitivity now, but the downside is that I'm
getting
> quite a bit of power line QRN at my QTH.
>
> I knew this problem was likely before I set up this station given that my
> lot is on a hilltop just adjacent to a utility company right of way for
high
> tension towers. Among the advice I got beforehand was that given the rain
> here (Oregon), one of the chief sources of trouble - dirty power line
> insulators - might be somewhat diminished. Truthfully, the noise is not
> intolerable, I do get DX sources, but with my RF gain at maximum and all
> extra filters off, I am seeing a noise floor between S5 and S6. With the
> wonderful crystal ladder filters in this rig (I now have the 217, 287, and
> 285 added, still looking for a 282), I can do wonders with CW stations,
but
> it is harder to deal with SSB (yes I know, some of you will say "what's
SSB
> (hi hi)", but I do enjoy listening to phone as well). I can hear a lot of
> voice down in the noise that is just not copyable.
>
> I am investigating several approaches to treating the noise problem and
> would welcome any and all comments and suggestions:
--
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