[SECC] Feeding 160 Meter Antenna

[Jeff Clarke]

K8CC modeled my "T" antenna and found the feed point to be around 16 ohms. It sounds
like I need to have a loading coil at the bottom , since the antenna is short on 160.
He also said the coil I need should be around 5 uH . Any idea what size that would be
??? (windings/diameter)

When I get this working on 160 I could also probably use it as an 80 meter vertical ,
with a series capacitor and then build some type a switch box to choose the
configuration I want - i.e zepp/80 meters/160 meters and have a 3 in one antenna...

     73's Jeff

=========================================================

Jeffrey D. Clarke 770-218-0278 email : ku8e@bellsouth.net


Please see my resume webpage at http://home.bellsouth.net/p/PWP-ku8e

=========================================================

----- Original Message -----
From: "Dan/W4NTI" <w4nti@mindspring.com>
To: "Bill Coleman" <aa4lr@arrl.net>; "Jeff Clarke" <ku8e@bellsouth.net>; "SECC"
<secc@contesting.com>
Cc: "MRRC Mailing List" <mrrc@contesting.com>
Sent: Saturday, November 30, 2002 12:43 PM
Subject: Re: [SECC] Feeding 160 Meter Antenna


> From my experience on 160 I think the trick is getting as much vertical
> properties as possible.
>
> Feeding a "T" will mean several excursions to get it right.  They tend to be
> a bit touchy from what I recall.  Course it should play well.
>
> FWIts worth department.  I put up a Inverted L,  about 190 foot total
> length.  It goes up about 50 feet and out the rest.  Towards the north this
> year.
>
> My only ground is a 8ft copper rod and the ground return of my run of AC
> line from the main house fuse box out to the shack.  Which is about 140 foot
> from the box to the shack ground.
>
> I use a 8 turn coil about 6 Inches across that hooks right to the base of
> the antenna.  The shield, of course, goes to ground.  The length of RG-213
> cable I ended up with was about 25 foot.  Nothing really measured.  Cut and
> try mainly.
>
> With NO TUNER I can adjust resonance anywhere in 160m by
> lengthning/shortning the wire.
>
> Give it a shot.  Worked for me in Ohio and two places here in Alabama,
>
> See ya in the contest.
>
> Dan/W4NTI   Alabama
>
> ----- Original Message -----
> From: "Bill Coleman" <aa4lr@arrl.net>
> To: "Jeff Clarke" <ku8e@bellsouth.net>; "SECC" <secc@contesting.com>
> Cc: "MRRC Mailing List" <mrrc@contesting.com>
> Sent: Friday, November 29, 2002 10:28 PM
> Subject: Re: [SECC] Feeding 160 Meter Antenna
>
>
> > On 11/29/02 9:17 PM, Jeff Clarke at ku8e@bellsouth.net wrote:
> >
> > >I was going to try to put up a antenna for the ARRL 160 contest and got
> to
> > >hinking  - why not use the zepp I use for 80-10 meters on 160 by shorting
> > >the 450 ohm
> > >feedline , sticking my antenna tuner outside and running a few radials.
> >
> > I have a 125 foot doublet that my tuner can handle on 160m. I made about
> > 200 Qs with it in last years ARRL 160 with 100 watts. You might just try
> > tuning it up directly.
> >
> >
> > This year, I'm going to try to shunt feed the tower on 160m. I have 13
> > 1/8 wave radials ont the ground, if I can drive the tower, it ought to be
> > at least as effective as the doublet.
> >
> >
> >
> >
> >
> > Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@arrl.net
> > Quote: "Not within a thousand years will man ever fly!"
> >             -- Wilbur Wright, 1901
> >
> > _______________________________________________
> > SECC mailing list
> > SECC@contesting.com
> > http://lists.contesting.com/mailman/listinfo/secc
>
>