Hi Gale!
Look here:
https://www3.qth.com/~comteksy/secure/
73!
Tim K3LR
GALE STEWARD wrote:
> Hi Tim,
>
> I looked on the site but didn't see/find the IYH
> chokes. Maybe you can lead me to the info...
>
> 73, Stew...
>
> --- Tim Duffy K3LR <k3lr@k3lr.com> wrote:
>
> > Hello Bill:
> >
> > I have been using the W0IYH choke design for many
> > years.
> > It uses 100 beads over RG-142 teflon coax.
> > I install PL-259s on both ends of the choke so that
> > it can be installed in
> > series with my feedlines
> > The performance of this choke has been superb 1.8 to
> > 30 MHz.
> > There are several installation pictures on my web
> > site.
> > I use them at every antenna feedpoint, at every
> > antenna switch and at the output
> > of every amplifier.
> >
> > The chokes are available at
> > http://www.comteksystems.com
> >
> > 73!
> > Tim K3LR
> >
> > http://www.k3lr.com
> >
> > Bill Turner wrote:
> >
> > > I'm thinking of replacing the toriod-core balun on
> > my Cushcraft X7
> > > triband yagi with an air-core coax balun. I've
> > searched the TowerTalk
> > > archives for comments on air-core baluns and there
> > seems to be a mixed
> > > bag.
> > >
> > > What I would like to do is eliminate any possible
> > trouble spots. I
> > > would like to run a single piece of coax from the
> > antenna, coiled into
> > > a balun, and then all the way to the transmitter.
> > I don't see the need
> > > for a coax connector up 80 feet in the air, just
> > waiting to fail. Why
> > > not just strip the coax and connect it directly to
> > the antenna,
> > > through the balun? Waterproffed, of course.
> > >
> > > I know there was some discussion of solenoid-wound
> > vs scramble-wound
> > > coax baluns, but I don't recall which was
> > considered the best. The
> > > ARRL handbook says "coil it like a rope", or words
> > to that effect.
> > >
> > > Another alternative is to slip a bunch of ferrite
> > beads over the coax.
> > > I don't seem to be able to find any beads which
> > will fit over RG-213
> > > size coax, only the RG-58 size. Anyone know of a
> > source?
> > >
> > > Comments are welcome.
> > >
> > > Bill W6WRT
> > > _______________________________________________
> > >
> > > _______________________________________________
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> > > TowerTalk@contesting.com
> > >
> >
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> >
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> >
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> >
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