[CQ-Contest] SO2R Technical Question - Round III - Antennas

[Robert Chudek - K0RC]

Lee, et.al.,

Our MWA member (Dave Ranney - KTØR - sk) who we just paid tribute to during 
NAQP was a very effective SO2R competitor from a small city lot. He also ran 
many Multi Op sessions with fellows from the club.

The general answer is, yes SO2R is "doable" from a city location. In this 
case he operated from a suburb with lot sizes similar to what you have. In 
Dave's case, he had two small towers loaded with antennas.

You can see his setup on the website at:  http://kt0r.spaces.live.com

73 de Bob - KØRC in MN


----- Original Message ----- 
From: "Steve London" <n2icarrl at gmail.com>
To: "Lee Buller" <k0wa at swbell.net>
Cc: "CQ Contest" <cq-contest at contesting.com>
Sent: Thursday, January 24, 2008 1:24 PM
Subject: Re: [CQ-Contest] SO2R Technical Question - Round III - Antennas


> Lee Buller wrote:
>> Wow....
>>
>> I've learned a lot about SO2R installations over the last week.  Thanks 
>> for
>> all the emails and responses.  Now, here is another questions.....
>>
>> Antennas.  I think I have an issue with antennas because of make up of my
>> location.  I have a 60 foot tower with a C3E - 80 and 40 meter 
>> inverted -V
>> dipoles on separate feedlines but at the same height on the tower, a 160
>> meter Inverted-L on the tower...and a full size quarter-wave vertical in 
>> the
>> yard with 32 radials.  I was planning on changing out the vertical for a
>> Butternut 6 band model or something similar, but as I was looking at the
>> installation the antenna would be very close to both the 160 -80- and 40
>> meter antennas....less than 15 feet.  I am on an 80 by 150 foot lot.  (I
>> think SO2R is gonna get expensive when I tell the YL we have to move!) 
>> So,
>> is it worthwhile to even consider doing SO2R on such a small lot because 
>> of
>> the proximity of the antennas.  This is a considerable 
>> investment....minus
>> the new farmstead.
>>
>
> I'm sure you already know that from Kansas, you're not going to be very
> effective in a DX contest if your second radio antenna is a Butternut 
> vertical.
>
> However, for domestic contests, such as NAQP and SS, a vertical will be 
> very
> effective for doing S&P work. I would locate the vertical as far away from 
> the
> tower as possible. You'll get some benefit from cross-polarization 
> isolation
> with the vertical vis-a-vis the horizontal antennas. However, I wouldn't 
> write
> off the idea of using the 80 or 40 dipole at the same time as the C3S, 
> even at
> 1500 watts. It's all a matter of filtering. You're on the right track with
> bandpass filters and coax stubs.
>
> 73,
> Steve, N2IC
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