EMRFD Message Archive 6228

Message Date From Subject
6228 2011-04-28 18:09:36 ward two new tools for the amateur radio designer
Over the last year or so I have been writing some tools
for the amateur radio designer. They have been described
in QRP Quarterly but I'm sure many of you don't get that
fine publication so I thought I'd let you know.

The first is a Smith Chart CAD software package. It has
some unique capabilities.

1) it is written in Java and so can run on any platform
which supports Java.

2) it models transmission line losses and allows you to
specify the losses in dB/foot at a given frequency.

3) it allows the user to import load files from EZNEC and
cocoaNEC as well as the miniVNApro and AIM4170
antenna analizers.

4) it allows you to specify a circuit element algebraically.

5) its window can be any size and it scales as necessary
to fit the circuit inside the screen. Makes it easier to read!

6) It supports any size circuit.

You can find further information at
yahoo group


The second tool I call DSPExplorer. It is an Integrated
Development Environment which allows you to write
DSP software modules, link them together and simulate
the results.

It, too, is written in Java. It is completely self contained:
it requires no external compiler or text editor or plotting
software to operate.

It consists of four basic pieces: a text editor, a compiler
(language syntax very like 'C'), a schematic editor and
a 'Scope/Spectrum analyzer.

You can find further information at
yahoo group

I have created some tutorial videos for each of these
tools. A few minutes into the first video will give you a
good taste of the tools' capabilities.

Thanks for your time, sorry the message was so long.

6229 2011-04-29 05:29:22 drmail377 Re: two new tools for the amateur radio designer
These tools are great. Thank you Ward for taking the time to put these out.

By the way, have you converted the videos to another format yet? I never could get them to play properly in Windows unless I transcoded them. For transcoding I used WinFF (http://winff.org) which is just a GUI front end for free open-source FFMPEG transcoder. I just kept the WinFF defaults and it worked OK, but there were a lot of strange messages and the resulting files in .avi containers were about twice as large. But at least they worked. I'm pretty sure by tweaking the myriad options via WinFF you can get the file size down.

Thanks Again & Best 73's, David WB4ONA

6230 2011-04-29 05:51:26 Sam Morgan Re: two new tools for the amateur radio designer
I used VLC to watch the videos, worked just fine on XP home

GB & 73
Sam Morgan