Message-ID: <005a01cc3c05$625432d0$1502a8c0@Clemens04>
From: "Clemens  Paul" <cpaul@gmx.net>
To: <rsgb_lf_group@blacksheep.org>
References: <516CAAC2-5EF6-456A-80E9-A4697777371E@numeo.fr>
Date: Wed, 6 Jul 2011 19:51:42 +0200
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Subject: LF: Re: Circuit Analysis Programs
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You could use a handy smith program (free) from
http://www.fritz.dellsperger.net/
Smith V3.10 Setup

Easy to use,no steep lerning curve. :-)
The circuit elements are lossless though.

Another free smith chart program is at
http://ussu.us/Smith_Charts.html

Alternatively you could use TLW3 by Dean Straw (ARRL) which is included with the 
ARRL
antenna handbook,but not downloadable from elsewhwere.
It can deal with lossy components.

73
Clemens
DL4RAJ


----- Original Message ----- 
From: "John Rabson" <john.rabson@numeo.fr>
To: <rsgb_lf_group@blacksheep.org>
Cc: "Robin Gape" <robingape@ukfsn.org>
Sent: Wednesday, July 06, 2011 7:21 PM
Subject: LF: Circuit Analysis Programs


I am experimenting with various forms of matching network to go between my 
136kHz antenna and the transmitter. It would be very handy if I had a fairly 
simple circuit analysis program with which to do the following:

Having measured the input impedance to the combined matching unit and antenna, 
then “subtract” the components of the matching network, see what I get and 
compare it with what I actually measure. I'm not always convinced that what I 
measure is what I think I'm measuring.

Platforms available: XP, Linux and MacOs X.

Yes, I could write something, but somebody must have done this and there is no 
point in reinventing the wheel.

Any suggestions, please?

Regards
John F5VLF


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