[Mobile-Portable] Webster Bandspanner Info

[Michael Tauson]

That was rude of gmail!  I did NOT want to send quite yet!

Continuing ...

On Fri, Mar 5, 2010 at 1:48 AM, Tom Bates <tlbates at lr.net> wrote:
> I have tried many matching schemes on many different mobile antennas, but have
> had the greatest overall success when using a shunt matching coil.

It's probably overkill, but I like the Collins 170L/180L design - or
the RF path, at least - with the Z-match a close second.  (I also like
autotuners like the Collins units but that's a separate subject.)
They both handle electrically short antennas rather nicely and that's
all I've ever used, mostly due to space constraints.  The Collins
design requires high voltage components but the Z-match can be built
using receiver variable condensors for output power up to something
over 100w.

This isn't Master Mobile's Z-match but a more recent matching unit of
the same name.  I first found it in an Australian source but
variations have been made all over since.  A good starting point is at
<http://users.tpg.com.au/users/ldbutler/SingleCoilZMatch.htm> which
also has URLs for variations on a theme.

I've been sniffing around for a long forgotten and unloved Collins
autotuner but people seem to want real money for them and my VA
pension can't support such wonderfulness.  That's like a Master
all-band coil; I don't expect to find one in this lifetime.

> If you're interested in seeing some of my mobile installations, see several pix on
> my QRZ.com bio.

What the heck is that huge thing sticking up in the air on the back of
the pickup and how many overpasses have lost out to it?  :-)

Best regards,

Michael, WH7HG
-- 
http://www.nationalmssociety.org/chapters/NTH/index.aspx
http://wh7hg.blogspot.com/
http://kludges-other-blog.blogspot.com
Hiki Nô!