Re: Underground Antenna Experiments on 160 meters.
- From: "John Smith" <assemblywizard@xxxxxxxxx>
- Date: Fri, 29 Jul 2005 13:48:57 -0700
Reg:
I can't even dream of burying a perfectly good, working, beautiful, sleek
antenna!
.... I shall refrain from burying any antenna, before its' time ...
John
"Reg Edwards" <g4fgq.regp@xxxxxxxxxxxxxxxxx> wrote in message
news:dcbipg$c94$1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Some years back I buried a 30 metre (60-feet) auminium wire one spade
> depth in my back garden. Wire was 1.5 mm in diameter. Soil
> resistivity about 100 ohm-metres. To scientists that's 10
> milli-Siemens. The near end of the wire came up in the shack. That's
> under my kitchen sink. It's still there. Open-circuit at the far end.
>
> As a counterpoise, something essential to tune it against, I erected a
> wire in the form of an inverted-L. This was about 30 feet high and
> overall length about 140 feet. I chose this length because it fitted
> nicely into my back garden. The front garden is too short even for an
> underground antenna.
>
> On the 160m band I fed into it about 30 watts from a home-brew
> transceiver so I can't provide for the record a manufacturer's type
> and serial number. However I still have the transceiver which can be
> inspected.
>
> Despite a high local noise level of S-6 I was able to communicate up
> to 60 miles with mobile stations in broad daylight on SSB. After
> sunset I could easily communicate with most of Europe on CW.
>
> I think a record of these buried antenna experiments should be kept
> for posterity, alongside the famous biblical work of B,L & E.
>
> By the way, as you see, I did remember to measure soil resistivity. It
> was the first thing I did. What buried wire do you think I used to
> measure it?
> ----
> Reg, G4FGQ
>
>
.
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