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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