[600MRG] Fwd: My local noise - more info...

[William E. Isakson]

Ken, Your low 50 foot wire, while perpendicular to the power lines is not
really orthogonal to it.  To be orthogonal the end needs to point right at
it, that is, it could be up at the same height as the wire and
perpendicular, or it could be perpendicular and sloping so that the end
points at it.   Even at that, you are, as you said, still in bed with it
because orthogonal things still get some crossover, but that would minimize
it.  The only other thing you could also do is set up a second voltage
probe antenna a distance from the first one, or better, use two verticals
on a line perpendicular to the voltage wire, and use something like the MFJ
noise canceler.  However, that is still limiting in that you would
definitely not be able to hear in the direction of the wire.   Still a
rotating inclined plane though.
Bill

--------


Bill Isakson
Roseburg, Oregon USA
bill.isakson at gmail.com




On Sat, Sep 21, 2013 at 9:33 PM, Kenneth G. Gordon <kgordon2006 at frontier.com
> wrote:

> On 22 Sep 2013 at 2:41, Kenneth G. Gordon wrote:
>
> > OK, Gents, you can easily hear my local noise problem here:
> >
> > http://www.youtube.com/watch?v=xN0rpTKrK_U
>
> Much of that noise comes from a 13.6 KV power line that runs right down are
> alley, parallel to the rear edge of our property, and directly east of me.
> It is
> also higher than anything else on our property except a large old pine tree
> that is around 100 feet tall, and whose top is less than 10 feet from the
> power-line.
>
> My short, 50', low wire is perpendicular to the power line.
>
> Personally, I think I am pretty much screwed here for listening.
>
> I think the only luck I am going to have is to take one or more of my
> receivers, one or more of my loops, and 5000' of wire and a 600 ohm
> resistor
> to make a Beverage out of, and head out into the boonies.
>
> Also, I began using Spectran and another piece of software whose name I
> cannot now recall with a BC-453 and a laptop many years ago.
>
> I like what the software does for receiving, but even that can't really
> help the
> noise problem here very much.
>
> Also, in order to receive anything even as "quiet" as you can hear on the
> youtube video, I have to turn off many of the local noise-makers, which
> include our Bosch dishwasher, our Fisher and Paykell clothes washer (which
> outputs a wobbly signal exactly on 500 Khz), all of the computers in the
> house, the computer-monitor in my shack (which also outputs an interfering
> signal in the 500 KHz range), the TV set, and ad infinitum, other junk.
>
> I took that youtube video by flashlight.
>
> During normal ham radio operations in my shack on 80 meters, the local
> noise level normally sits at S-9 constantly.
>
> In order to get any quietness, the entire neighborhood must experience a
> total power outage, and that only lasts an hour, at most, around here.
>
> Not fun, but it used to be much WORSE.... :-(
>
> Ken W7EKB
>
>
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