At 01:28 a.m. 7/09/2007, you wrote:
Hi LF gang,
In my sked last night with Finbar (best conditions for some weeks) we
discussed mini-beverage antennas laid directly on the ground. I've done
a Google trawl and there's a bit evidence that they work well.
I have a need to keep things low-profile due to all the adjacent fields
being used for sheep, so running a long (100-200m) wire on the ground is
attractive. I could even run it outside the fenceline along the verge
beside the road - I'm in a very rural area.
Does anyone have any experience of using BOGs on 500kHz?
John
Gm4SLV
Hello John and the LF Group,
A few years ago, Robert, VK7ZAL made regular expeditions to a remote
site near Hobart in Tasmania and listened for our ZL gang who were
transmitting on 181.4 kHz. He ran out a couple of hundred metres or
so of insulated wire, over the ground and bushes, pointed towards ZL,
and connected to an antenna tuner that fed his receiver. I should
also add that the far end was unterminated. Allowing for the
wavelength, this short "Beverage" worked very well.
I have copies of recordings made by Robert and was surprised by the
very good reception at his end [audible CW].
At John's "remote" site I believe that a 200m BOG would be well worth
a try on 500kHz.
Perhaps I should add that we have not yet achieved any access to the
500 kHz zone in ZL land. However, we have open access, all modes, all
the way, from 130 through to 190 Khz. The other good news is that the
"power line carriers", radiated from high-voltage power lines, have
nearly all gone. In the past, they made some parts of the LF spectrum
quite unusable. We just need a few more LF participants.
73,
Kevin, ZL4MD
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