Message-ID: <487F37A4.9090906@ukonline.co.uk>
Date: Thu, 17 Jul 2008 13:14:28 +0100
From: Peter Dodd <g3ldo@ukonline.co.uk>
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Subject: Re: LF: satellites
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John W Gould wrote:
> To me the important point that I tried to make in my posting, which has
> drawn no comment, is the one I made about getting people to write up their
> experimental work for publication, and specifically that concerning 500kHz.
>   
> To maintain progress on gaining a long-term allocation around 500kHz we will
> need to raise the profile nationally and internationally of work undertaken
> on 500kHz.  One way of doing this is to get a few good technical articles
> written, not just sharing knowledge but encouraging others and providing
> suitable designs to enable them to join in; good construction articles can
> do just that. 
>
>   
I had considered describing the problem and the solution of using an 
existing HF antenna, such as a quad or any other wire beam antenna, on 
500kHz. My main reason for not doing so was that I thought that it would 
be regarded as too 'amateurish' even though my HF quad worked very well 
as a 500kHz antenna, with the appropriate loading and matching 
arrangements.
Furthermore, my 500kHz transmitter is just a valve transmitter using the 
power supply and components of a defunked homebrew linear amplifier, 
which can hardly be described as 'experimental work'.
I understand 'experimental work' to be the use of 'state of the art' RF 
amplifiers and the use of special modes - something I have not yet done.

Regards

Peter, G3LDO