[Towertalk] Can my 40' tower be a 160m vertical?

[Kelly Taylor]

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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