FW: [TowerTalk] FW: Help - 80m 4 square

N2TK n2tk@idsi.net
Thu, 24 Dec 1998 12:29:16 -0500




-----Original Message-----
From: zeitler@ibm.net [mailto:zeitler@ibm.net]
Sent: Tuesday, December 22, 1998 2:34 AM
To: N2TK
Subject: Re: [TowerTalk] FW: Help - 80m 4 square


Tony,
Only one radial per vertical is killing your gain. You should have at least
four radials per vertical if in a ground plane configuration. if ground
mounted then mo' wire = mo' better--just do not bury it.

Lane Zeitler
KM3G
-----Original Message-----
From: N2TK <n2tk@idsi.net>
To: towertalk@contesting.com <towertalk@contesting.com>
Date: Monday, December 21, 1998 4:45 PM
Subject: [TowerTalk] FW: Help - 80m 4 square


>
>
>Presently I have a 4 square based on the article in section 6.3 of ON4UN's
>Low Band Dxing, 2nd edition.
>I have 4 posts with a vertical wire from each pulled up to the top of the
>80' tower. I am using 1/4 wave 70 ohm feedlines to the Comtek box. I have
>one radial on each leg pointing away from the tower. There is a current
>balun at each feed point.
>The differences being -
>- the vertical wires are tied into the tower at 80'. This adds more slope
to
>the vertical wires.
>- the radials and the feedpoint are 12' off the ground
>- the vertical wires and 1/4 wave coax are cut for 3.65MHz
>- the one radial on each leg is cut to for minimum dumped power at 3.79.
>- I switch in a coil in the radial at each leg to have minimum dumped power
>at 3.520.
>
>Performance - about 10-18 db f/b and very slight gain over a Cushcraft AV80
>36' vertical with 4 elevated 1/4 wave radials.
>
>My questions on trying to improve performance
>- Thought performance would improve by making the verticals more vertical.
I
>can do that by making them
>"T's". The vertical portion would be about 45-48' before I added the T.
>- Or I could put up aluminum verticals at each post. Thought was to use 8'
>pieces of 2" tapering down to 3/4".
>- With the radials, do you think I would get a measureable improvement by
>either adding one or two more per leg? What about the articles on 1/8 wave
>radials? Would that work with a coil?
>- Is performance suffering by cutting the verticals and 1/4 wave matching
>lines for 3.65 and then switching in a coil in the radials for phone and
cw?
>Tnx for any ideas and input. As to not clutter up towertalk, you can send
>direct to me any responses and suggestions and I will summarize on
towertalk
>Tony N2TK
>
>
>--
>FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
>Submissions:              towertalk@contesting.com
>Administrative requests:  towertalk-REQUEST@contesting.com
>Problems:                 owner-towertalk@contesting.com
>Search:                   http://www.contesting.com/km9p/search.htm
>
>


--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm