Ok, I understand what you meant. The cebik article I
posted has a link at the very end to Butler's site.
Who helped develope the original "Z" match in New
Zealand. That's good reading too, on Z matches. Lots
of technical graphs on matching efficiency, etc. Was
the german company you refered to about selling parts,
Annecke? Palstar Tuner company sell all their high
quality components off the shelf for the homebuilder,
in case anyone's interested. Check out the pictures on
their website, nice stuff! I built the circuit in
William Orr's "Radio Hanbook" 23rd Edition. Work's
great and I built it with a lot heftier components.
--- NJ0IP <Rick@DJ0IP.de> wrote:
> Actually your answer is also incorrect, Randy.
> (but correct for the tuner I showed the link to)
> The tuner I showed the link to is a different one
> than the one I was
> referring to. My mistake.
> Linear AMP UK makes (or made) a tuner called
> "LA-STWM", based on the Z-match
> design (also described in Cebik's article on link
> coupled tuners.
> Quote from the brochure:
> "This is an exciting new design which is made in the
> UK by Linear Amp UK.
> The LA-STWM is a true balanced, inductively coupled
> ATU covering the full HF
> spectrum from 160m to 10m."
> "Inductively coupled" is another name for link
> The brochure says "There are two sets of terminals
> on the rear of the unit,
> one covering 10m to 20m and the other 30m to 160m."
> This is EXACTLY how the
> Z-match works.
> Finally, I've seen the box at the Friedrechshafen
> Ham Fest. The Linear AMP
> UK booth was located about 20 feet away from our
> booth (Ten-Tec booth).
> However the big question is, have they discontinued
> that box and replaced it
> with the one you looked at. I hope not.
> I've sent an email to them asking for clarity.
> -----Original Message-----
> From: email@example.com
> On Behalf Of Randy Russe3ll
> Sent: Wednesday, February 01, 2006 8:43 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] openwire feed OT
> Rick, I'm sorry to say that unit is not a link
> tuner. It is a tuner, like most, with a 4:1 Balun
> the output of the tuner, so it can be marketed as a
> balanced line tuner. If your interested in building
> true link coupled tuner, there is a great deal of
> on this page. http://www.cebik.com/link/link.html
> Also a neat echnique to make your own inductors, for
> any power rationg you might want. The second link is
> parts source with the Caldwell Condensers. Caldwell
> bought out the old E.F. Johnson and Hammarlund
> Capacitor plants. So the parts are available new if
> you absolutely can't find one at a flea mart.
> http://www.cardwellcondenser.com I've bought four
> these variables, in like new condition for a total
> 120 dollars. Just snap them up whenever you see
> on the want adds. Also, the Cebik article on
> tuner designs gives the circuits and construction
> plans for Link-coupled tuners.
> --- NJ0IP <Rick@DJ0IP.de> wrote:
> > While we are on the subject of link-coupled
> > of openwire, you might
> > want to take a look at a commercial unit available
> > in England (they have UPS
> > in England too).
> > Go to:
> > http://www.linamp.co.uk/
> > AND click on "Supertuner" in the menu on the left.
> > 73
> > Rick
> > DJ0IP
> > PS: There is a German company that sells the
> > components to build a tuner
> > based on this Z-match concept, if anyone is
> > interested.
> > _______________________________________________
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> > TenTec@contesting.com
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