[Towertalk] Can my 40' tower be a 160m vertical?
Mac
Mac" <w5mc@sbcglobal.net
Fri, 27 Sep 2002 12:50:52 -0500
You have a problem with capitalism ?? not near as much as I do with
socialism...
----- Original Message -----
From: "Kelly Taylor" <ve4xt@mb.sympatico.ca>
To: "EUGENE SMAR" <spelunk.sueno@prodigy.net>; <kb9cry@attbi.com>; "Jim
Leahy" <jimleahy@adelphia.net>
Cc: "Towertalk" <towertalk@contesting.com>
Sent: Thursday, September 26, 2002 1:21 PM
Subject: Re: [Towertalk] Can my 40' tower be a 160m vertical?
> Yes, but if you get it from ARRL, then you have to PAY for it.
>
> Oh, wait, the ARRL as capitalist pigs thing is on another reflector.
Sorry.
>
> 73, kelly
> ve4xt
> ----- Original Message -----
> From: "EUGENE SMAR" <spelunk.sueno@prodigy.net>
> To: <kb9cry@attbi.com>; "Jim Leahy" <jimleahy@adelphia.net>
> Cc: "Towertalk" <towertalk@contesting.com>
> Sent: Thursday, September 26, 2002 12:24 PM
> Subject: Re: [Towertalk] Can my 40' tower be a 160m vertical?
>
>
> > Jim:
> >
> > I agree with Phil's recommendations on Jeff's book. You can get it
> > from ARRL. I based my Trylon 64's shunt feed on Jeff's design. The key
> is
> > to have something as a capacitive load at or near the tower top to make
> the
> > tower appear electrically longer than it is physically. Your Yagi/40M
> > add-on ought to be a pretty good load.
> >
> > Many on this reflector would recommend modeling, but I'd say try it
> and
> > let us all know. The feed is nothing more than a wire from the bottom
of
> > the tower and connected near the top, keeping it a couple of feet away
> from
> > the tower itself (I used PVC tubing as spacer material). Then you feed
> the
> > bottom of the wire through a variable transmitting cap of some fairly
> large
> > value in series with the coax center; I keep the cap insulated from
ground
> > by mounting it in a plastic weather enclosure (a plastic shoe box from
> > K-mart). The coax shield gets connected to the tower legs and ground
> > radials. Tune the cap for min SWR and call CQ.
> >
> > BTW, the sloper might have an impact on your ability to shunt feed
> the
> > tower. If you can't get the tower to load, you might want to remove the
> > sloper and try again. (I haven't modeled this, so I'm guessing.)
> >
> > GL es 73 de
> > Gene Smar AD3F
> >
> > -----Original Message-----
> > From: kb9cry@attbi.com <kb9cry@attbi.com>
> > To: Jim Leahy <jimleahy@adelphia.net>
> > Cc: Towertalk <towertalk@contesting.com>
> > Date: Thursday, September 26, 2002 9:17 AM
> > Subject: Re: [Towertalk] Can my 40' tower be a 160m vertical?
> >
> >
> > >QSL on all Jim. Purchase Jeff Briggs, K1ZM's book from
> > >the ARRL titled "DXing on the Edge, The Thrill of 160
> > >Meters" In it you'll find all the info and hints to
> > >shunt feed your tower. I did the same (mine's a 72 ft.
> > >Trylon, but as long at the tower is not too high) and it
> > >will definately work. You need the vertically
> > >polarized, low angle signal on topband and you don't get
> > >that with all the other stuff except a Inverted L, which
> > >is also in Jeff's book. Piks of my shunt feed can be
> > >found on my club's website at www.nidxa.org. Go to the
> > >DX Showcase section. Cu on Topband, 73 Phil KB9CRY
> > >> Hello all. I've always been under the impression that one had to have
a
> > 100'
> > >> or taller tower in order to shunt feed it for 160m. Therefore, for
> years
> > >> I've been fooling with long wires, random wires, low (25') windoms,
> > slopers
> > >> etc. without a lot of luck. Plus I'm only running 100w. But I
happened
> > >> across a recent thread where WL7M is using his 40' Rohn on 160/80m.
Now
> > I'm
> > >> wondering if I can do this with my 40' freestanding tower and get
> better
> > >> results with DX. Here's what I have: 40' freestanding tower, Mosley
> TA-33
> > >> w/40m kit, 3 phillystran guy wires, each leg to a grounding rod and
> about
> > 8
> > >> random length radials buried from the tower base in conjuction with a
> > W9INN
> > >> all-band wire sloper. Is this a viable setup for using the tower
on160m
> > >> operation? If so, are there any good books/instructions on exactly
how
> to
> > do
> > >> this? I'm also contemplating a Butternut HF2V 80/40 with the 160m kit
> > which
> > >> would end up being about 31' in length. Winter will be approaching
fast
> > and
> > >> I want to get something different going on Top Band. Plus the fact
that
> > I've
> > >> been inactive for about 3 years, I'm getting itchy! I've worked about
> > 25-30
> > >> countries with the various wire setups and 100w over the years.
Looking
> > to
> > >> try something different. I'm currently using a Cushcraft AP8 vertical
> for
> > >> 80/40/WARC operation. That antenna, while serving me well when we
lived
> > in
> > >> an apartment years ago, is really lacking when it comes to 80 meter
> > >> operation. That is one of the reasons I'm thinking about the
Butternut.
> > >> Bottom line, I REALLY need to improve my 80/160m situation. Thanks
for
> > any
> > >> help!
> > >> Jim K2JL
> > >>
> > >> _______________________________________________
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> > >_______________________________________________
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> > http://www.mscomputer.com
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> an
> > additional 5 percent off any weather station price.
> > >_______________________________________________
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> >
> > _______________________________________________
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> >
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>
> _______________________________________________
> AN Wireless Self Supporting Towers at discounted prices,
> See http://www.mscomputer.com
>
> Wireless Weather Stations now $349.95. Call Toll Free,
> 888-333-9041 for additional information.
> _______________________________________________
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