Message-ID: <4A190F2C.4070901@btconnect.com>
Date: Sun, 24 May 2009 10:11:08 +0100
From: Richard Newstead <g3cwi@btconnect.com>
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Subject: Re: LF: First Portable Trip
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g0mrf@aol.com wrote:
> Hi Richard.
>
> I've used a system similar to yours with some success.  Mine, now 
> dismantled, is detailed at
>
> http://www.g0mrf.com/500kAntenna.htm
>
> It was a 10m mast with a very small 3m top section. Power in 7.5W PEP.
> 100km was no problem 24/7 with good conditions it made it to ON and 
> PA.  With very good conditions it made it to the Scotish Islands at 
> apx 800km but that was rare.
>
> The photo shows a variometer in series with a fixed coil in series 
> with another fixed coil which was connected to ground at the bottom 
> end.  Despite all these turns of wire, the 50 ohm match was only a few 
> turns up from the ground end.
>
Hi David

My problem is that I have to carry everything up the hill (or mountain) 
myself along with all the other things needed for 
hillwalking/mountaineering. So far I have realised that a 200ft L is not 
a suitable configuration. Alan G3NYK has suggested a T with 200ft top 
instead - that will keep everything a bit further from the ground. Kites 
are fun and obviously effective but the right conditions rarely occur 
for kitebourne operations - I will be trying them but I need something 
that can be used in a wide variety of weather and local conditions. 
Incidentally, my experience is that hilltops often suffer from very 
turbulent airflows which makes kite flying very tricky. Gun (the hill 
that I was on yesterday) is especially bad in that respect as it often 
seems to have some sort of windshear over it making launching a kite a 
real problem - been there, got the T shirt! My children - who are 
usually tasked with flying the kite - refuse to attempt it on Gun any 
more due to my rather poor response when the kite crashes mid-QSO...

The microwavers here will be smiling as it took them a while to realise 
that my sort of portable is very different from car-supported operations 
in a field. That being said I eventually developed a fully portable and 
very effective 10G system that can be backpacked anywhere. I will manage 
the same on 500kHz given time I expect.

73

Richard
G3CWI