[OZAPRS] HF APRS Balun help needed

[Brian Mennis]

Andrew,

There is an interesting construction article on baluns in AR for October
1997.

I built a couple of these and am currently using one of them in the centre
of a multi-band dipole. This is 3 dipoles joined at the balun, a quick and
easy way to get multi band operation with one bit of coax to the rig.
Probably not the most efficient but it works, and is a system I have used
on
and off for years, mostly in inverted V configurations.

One thing that I did notice with these baluns was that I had to make the
lengths of the dipole halves much longer than the formula would indicate.
Normally, when I make an antenna like this, I make it much longer than the
formula says, but even my "extra" was not sufficient with this balun.

If you cannot source the article, I could copy it and fax or post it, if
you
can give me an appropriate address.

Brian VK4XS.

-----Original Message-----
From: ozaprs-bounces at marconi.ics.mq.edu.au
[mailto:ozaprs-bounces at marconi.ics.mq.edu.au]On Behalf Of Andrew Rich
Sent: 9 December 2003 4:14
To: TAPR APRS Special Interest Group; ozaprs at marconi.ics.mq.edu.au
Subject: [OZAPRS] HF APRS Balun help needed


Howdy,

New to HF etc etc

What is the best BALUN to run for a 468/f MHz dipole ?

I have seen choke baluns and ferrite core baluns.

I am thinking I need to go get some pvc pipe and rap coax around it ??

Andrew VK4TEC

www.tech-software.net (APRS etc)

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