From: G0MRF@aol.com
Message-ID: <8c.1a44089.27a4becc@aol.com>
Date: Sat, 27 Jan 2001 19:16:12 EST
Subject: Re: LF: Re: Re. Transatlantic tests etc.
To: rsgb_lf_group@blacksheep.org
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In a message dated 1/27/01 7:23:00 PM GMT Standard Time, g3ldo@ukonline.co.uk 
writes:

<< > I too like the team approach and would be happy to co-operate.
 > It would be intresting to check the EIRP of the Amberley antenna,
 > particularly in the NW direction.I could bring my portable field strength
 > gear along some time. We would not need to run very high power, I get
 > useable signals at 3Km with only 1 amp into my ant here (ie 70mw ERP)
 >
 
 Thank you for your offer. I would be very interested in finding out what the
 signal strength distribution is from the 'hole-in-the-ground' QTH of GB2CPM.
 At the moment I need to do some more antenna impedance checks to find a
 better way of feeding it. I will keep you informed.
  >>

Hi Chaps.
For info: There was an interesting article on buried dioples used in the USA 
for communication with aircraft in the event of a nuclear war. (QEX)
Thinking this couln't possibly work I built a scale model on HF but kept it 
100mm above the ground.
Surprisingly, it worked. The length was shortened by 30% due to ground 
proximity and the poor YO station I worked thought I was completly mad when I 
sent "ANT IS DIPOLE 100mm AGL"
So, if you have enough space and a lot of garden canes you'll 'only' need 
700m for a self resonant diople.

73

David