[TowerTalk] What about hams with small lots???
Sat, 1 Sep 2001 22:11:59 -0700
My solution for my 50' x 100' lot is going to be an 88' dipole, with the
feed at about 45' [if I ever get it up!]. The ends will be between 25 & 30'
up and will probably zig-zag somewhat. They will also run more or less
parallel and within 20 to 25 feet of a bunch of residential power lines...
This will be fed with 300 ohm twin lead. I'm not expecting stellar
performance, but it should get me on the air.
I also have a vertical for 10 meters, and hope to put up a small tri-bander
someday. My original plan for the lot was to get up a 260' loop between the
trees pretty much following the property line. But all the power lines
would make it very difficult, and possibly dangerous to hang the loop. I've
always wanted a killer antenna, but not this way:-)
Rover antennas are much easier!
Dan Evans N9RLA
Scottsburg, IN 47170
IN-Ham list administrator
1/2 of the N9RLA /R no budget Rover Team
Check out the Rover Resource Page at:
----- Original Message -----
From: "Mike" <W4EF@dellroy.com>
To: "David L. Thompson" <firstname.lastname@example.org>;
Sent: Saturday, September 01, 2001 2:24 PM
Subject: Re: [TowerTalk] What about hams with small lots???
> Hi Dave,
> I was looking over my logs from back in Florida the other night. I had
> forgotten just how much DX I was able to work with 100 watts and
> a 50' high "T" antenna fed against ground on 1/2 acre lot. The big
> thing was adding the radials (about 2000') of wire under the antenna.
> Before adding the radials, the antenna was an air cooled dummy load.
> Although it still had room for improvement, the 25 or so somewhat
> asymetrically placed radials had a profound effect on my ability to
> be heard (especially in Europe). As far as receiving goes, I used
> a JPS ANC-4 to help provide some rejection of local noise. I still had
> a long way to go, but it was a big help.
> When I was living in Ohio, I had a similar situation - 55' tower top
> with a Cushcraft A3 and inverted V's for 40 and 80. The tower was
> shunt fed on 160 and seemed to work "okay" but my radial system
> was not as good as in Florida (about 15 1/8 wave radials vs 25 1/4 wave).
> The interesting thing about this installation was on receive. When I
> from the shunt fed tower to my 40 meter inverted V thru a B&W shorting
> switch, the shorted stub on the shunt feed detuned the tower, and made
> the 40 meter inverted vee a very quiet receive antenna. I still recall
> UG6GAW CQing plain as day one evening on the inverted V. When I
> switched to shunt fed tower, he was unreadable. Who knows - with an
> amp and a few more radials, I probably could have worked him :) :)
> If I had a small lot to work with, I would go with a single tower
> 2el 40, 1/4 sloper on 80 and shunt feed on 160. I think an array of short
> verticals can be made to work on receive if careful attention is paid to
> detuning nearby resonant structures, but I haven't actually had time to
> try it (I am anxious to build one at my QTH in LA).
> 73 de Mike, W4EF...............
> ----- Original Message -----
> From: "David L. Thompson" <email@example.com>
> To: <firstname.lastname@example.org>
> Sent: Friday, August 31, 2001 4:03 PM
> Subject: [TowerTalk] What about hams with small lots???
> > I keep seeing 4 squares on 80 and 165 foot towers with stacked 3 el 40
> > beams. Well I suspect that most don't have
> > the real estate to use anything like this. What about effective
> > for those of us on small lots (for those fortunate enough
> > not to have antenna restrictions).
> > I have tried over the years to put up good antennas on my 1/2 acre tree
> > filled lot with a two story house in the middle. I think a large chunk
> > hams on the reflector would like how to put together effective,
> > stations that overcome the problems of interactions and RFI that I have
> > into...Especially for those of us who are trying to work 160 to 10 or
> > VHF. I think 20 to VHF can be accomplished easy enough, but beyond a 2
> > 40 how do we get antennas to put out a large signal on 40, 80 or 160 and
> > be an alligator (no RX antenna).
> > Then there is the problem of interaction with antennas all over the
> > I have my ideas ...how about yours?
> > Just my two cents...
> > 73 Dave K4JRB
> > List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
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> List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
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> supporting towers up to 96 feet for under $1500!!
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