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From: "Reg Edwards"
Subject: Re: Designing an antenna
Date: Fri, 25 Oct 2002 02:30:15 +0000 (UTC)
Organization: Private individual
References: <email@example.com> <firstname.lastname@example.org>
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Tom wrote -
> You may get a lot more answers to your question over on
> rec.radio.amateur.antennas. Look for postings there and in this group
> by Reg Edwards, and follow the link to his website where you will find
> programs that will give you reasonable estimates of the feedpoint
> impedance of simple loop and doublet antennas. "RJELOOP1.EXE" could
> be helpful if you understand impedances and basic matching techniques
> and limitations.
Hello again Tom. Thanks for the plug.
You are a little out of date. A somewhat better version of the same subject
is MAGLOOP4.exe which I wrote after a little more experience warming up my
I am aware of the suggestions sometimes made that my programs would be more
educational if I disclosed the source code including the all-important
'equations'. I don't agree. Recently I have published some simple examples
of source code in my website with the object of showing what is involved.
No 'equations' can be seen. Only anybody who is capable of writing the
programs themselves from scratch would derive much education from them. I
bare my thoughts plus some source code on the website just to convey this
From private requests received there have been other underlying motives for
access to source code. They would have been similarly disappointed with the
usefulness of the expected 'equations'. At least one 'university student'
of uncertain address had to abandon a 'project from his professor' because
he was unable to translate from Pascal to some version of Windows Basic and
I was unable to help.
The programs, of course, are intended to assist with practical construction
and to inform users of what to expect in the way of performance. Input data
almost invariably includes physical dimensions and educational aspects
derive from what-if? facilities. It is necessary at least to have a vague
idea of what it's all about before any advance in that direction can be
made. I am unable to provide individual correspondence courses on radio
engineering, mathematics and computer programming. I have neither the time,
experience or the inclination.
Shifting the subject, the difficulty with newsgroups is the impossibility of
sorting wheat from chaff. The situation regarding obtaining genuine
information via Google is hardly any better. Railway and airline timetables
are OK. But whoever owns/controls the world's communication systems,
Internet (specially Internet), satellites, phones, TV, newspapers will
own/rule the Earth, including that commodity more vital than wheat or
ice - oil.
Get MAGLOOP4. Also look through one-line program descriptions for anything
else which may of interest.
Regards from Reg G4FGQ
Free Radio Design Software
Go to http://www.g4fgq.com
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