Hi Jim
Looks excellent. Giving me some good ideas
Thanks for uploading this
Jim G7NKS
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of James Moritz
Sent: 09 July 2009 01:54
To: [email protected]
Subject: LF: LF Tuning Aids
Dear LF Group,
I have just uploaded a file (LF_tuning_aids.pdf) to the UK500kHz group site
at http://groups.google.com/group/uk500khz/files.
This is an updated/expanded version of my old "LF tuning meter" article that
has been on G3YXM's web pages for some time. It describes a number of
devices for monitoring antenna matching I have used on 136kHz and 500kHz,
including:
-The original 136kHz LF tuning meter design, indicating voltage, current and
phase, with updates for dual band 136k/500k use.
-The "Scopematch", for displaying antenna feeder voltage and current
waveforms on a dual trace scope
-A couple of simple SWR bridge designs
Hope it proves to be of interest - any comments welcome.
Cheers, Jim Moritz
73 de M0BMU
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