I have a JPS ANC-4 http://www.universal-radio.com/catalog/preamps/0094.html
and my experience is mixed. About 80% of the time it is ineffective
regardless of the sense antenna polarity or configuration.
If there is more than one source of noise you can only null out
one....perhaps.
I did discover that it seems to work better if the station antenna is a
vertical.
Generally, I thought the unit and others like it are vastly over-hyped and
while it CAN work, you will have to spend a LOT of time configuring the
sense/station antenna relationship to get it to have any effect.
I think I got shafted.
Regards
Dave Harmon
K6XYZ[at]sbcglobal[dot]net
Sperry, Ok.
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Gedas
Sent: Friday, December 15, 2006 1:06 PM
To: towertalk reflector
Subject: Re: [TowerTalk] You think you have line noise !
I am quite interested in this discussion. After twisting the arm of my
brother down in Fla to get more active on the bands, he finally puts up a
couple antennas only to find 40m and 20m covered in S9 powerline noise. I
have advised him to do the normal sniffing around etc and to contact the
local power company which he says he has done.
But, in the meantime, has anyone here had any experience with devices like
the MFJ-1025? Are these things worth anything and do they work as
advertised?
Gedas
W8BYA
----- Original Message -----
From: Dave NØRQ
To: Randall K Martin ; towertalk reflector
Sent: Friday, December 15, 2006 1:57 PM
Subject: Re: [TowerTalk] You think you have line noise !
Thankfully, some utilities seem to be good to work with,
but there are too many that do little or nothing to correct
harmful interference. My situation (a small rural "co-op")
falls into the latter category, and I, too, and well into the
process of working with the ARRL (& FCC) to get it
remedied.
There isn't a lot of point having a fine tower, well-grounded,
full of effective antennas, if the only signals you hear
are S9 buzzing and anything strong enough to overcome
the interference.
http://www.powerlinenoise.com (my site) has info that
should be helpful to anyone with the same problem...
Dave N0RQ
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