It's roughly the same circuit as Matchbox. I used a
3906 (2 1/2" 12" long ) inductor, and a couple of the
biggest caps I could find, double ganged on the
output. Similar circuit and one other on Cebik's
antenna site under balanced link tuners. He has a
circuit which you make your own inductor. Richard
Measures has one that is not link coupled, uses two
roller inductors, but is I believe a good one. It's on
the internet if you google. Don't know if I could
truly put a Kilo through mine. The caps would take it
but not sure what the inductor can handle. 73s
--- Denton <denton@oregontrail.net> wrote:
> Have any details on the homebrew tuner?
> ----- Original Message -----
> From: "Randy Russe3ll" <lord_russell53@yahoo.com>
> To: "Discussion of Ten-Tec Equipment"
> <tentec@contesting.com>
> Sent: Wednesday, January 18, 2006 12:18 PM
> Subject: Re: [TenTec] What makes the 238 good or any
> other tuner good?
>
>
> > Palstar tuners are the best tuners currently
> > manufactured on the commercial market. The 1500cv
> is a
> > T compared to your previous L's. When you compare
> the
> > two on your windom, which by design stays
> relatively
> > low in swr range for multi-band use, you might not
> see
> > the difference or advantage. Have you tried
> comparing
> > the two on any Hi-Z loads? Or low Z loads? Maybe
> you
> > would see a bit more of a difference. Have no
> > experience with the T type myself. Currently use
> a
> > Johnson Matchbox or another homebrew Kilowatt link
> > coupled balanced design I have. It's faster, I
> think,
> > to just go too my cheat sheet numbers, hit the
> tune
> > button on the Omni, and operate, than it is to
> tune
> > up an "L" anew each time. I'm able to get a 1:1
> swr
> > anywhere, on any band, with no baluns and the
> lowest
> > loss possible from a tuner on my 140 foot dipole,
> 600
> > ohm open wire feed. Next time maybe try the
> Palstar
> > 1500 Balanced tuner! 73s
> >
> > --- Rich McCabe <r.mccabe@1967z28.com> wrote:
> >
> >> I have been messing around with tuners. I
> currently
> >> have a 238a and have
> >> owned a couple 238 (old style) as well.
> >>
> >> I think I am spoiled and really did not know it.
> The
> >> 238a has been a great
> >> tuner and I have no complaints. I guess its a
> little
> >> bland looking, but
> >> thats not really its job is it?
> >>
> >> Anyway, I got an itch and bought a new Palstar
> >> 1500CV.
> >>
> >> I use these on a Carolina Windom. The 238 is
> broad
> >> and easy to find a
> >> match. The Palstar is a fair amount of work and
> >> although I can find a
> >> perfect match, it only comes after lots of
> tweaking
> >> between the input and
> >> output caps and roller inductor. You definitly
> need
> >> a cheat sheet with the
> >> Palstar.
> >>
> >> At first I could not understand why the Palstar
> had
> >> a turns
> >> counter/reduction on the caps, but I know know
> its
> >> so sensitive you would
> >> not be able to tune it otherwise.
> >>
> >> So the question is...
> >>
> >> What makes a good tuner? I have heard people talk
> >> about "Q" when it comes to
> >> tuners.
> >>
> >> I am sure the ability to easily tune and find a
> >> match is one thing, but does
> >> that really mean that its a great tuner?
> >>
> >> Right now, I from a tuning standpoint the Ten-Tec
> >> wins hands down ! But is
> >> that all I should consider?
> >>
> >> 73,
> >>
> >> Rich
> >> kd0zv
> >>
> >>
> >> _______________________________________________
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> >>
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> >>
> >
> >
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> >
>
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