Topband: BOG near noisy powerline on 160
Greg - ZL3IX
zl3ix at inet.net.nz
Fri Feb 8 13:46:28 EST 2019
If I were in your situation I would go for the smaller antenna further
away from the line. I would then take a sample of noise from the line
using an antenna right under it and use the sample to try and cancel out
some of the noise on the Rx antenna, à la WA1ION. See here
http://www.pa4tim.nl/wp-content/uploads/2011/02/passive_bb_phasing.pdf
73, Greg, ZL3IX
On 2019-02-09 05:31 a.m., N4ZR wrote:
> Recently I put down a 220' BOG, using the KD9SV hardware, including
> the preamp. Because of my yard's layout, the forward end of the BOG
> fell within about 20 feet of what the power company has identified
> (but not fixed yet), a noisy line with a number of broken insulators.
>
> I came in to listen to the antenna, and was surprised to note that my
> noise (mostly from the powerline, by ear) is worse on the BOG than on
> my jury-rigged sloper transmit antenna. It is much (maybe 20 dB)
> worse in the direction toward the power line than in the opposite.
> While I take this as encouraging evidence that the BOG has some
> directivity, I don't think I'm even hearing any atmospheric noise that
> may be present, because of the power line.
>
> So now I'm wondering, is the BOG in this position worth keeping, even
> assuming that I can eventually get the power company to fix the line.
> Or should I look at another type of receiving antenna, such as a K9AY
> loop or SAL, which can be placed much farther from the power line?
>
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