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Today's Topics:
1. Re: Using steel e-fence wire for antenna wire (Spencer)
2. Re: Using steel e-fence wire for antenna wire (George Dubovsky)
3. Re: Using steel e-fence wire for antenna wire (Jim Lux)
4. Re: [Bulk] Re: 80 meter wire antenna question (dw)
5. Thanks to TT Members (N3AE) (N3AE)
6. FW: FW: 80 meter wire antenna question (Matt)
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Message: 1
Date: Tue, 22 Sep 2015 10:42:23 -0600
From: Spencer <w1gak@arrl.net>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
Message-ID: <560184EF.1020908@arrl.net>
Content-Type: text/plain; charset=UTF-8; format=flowed
0.0625" copper coated steel welding wire, 66# reel, ~$180. over a mile
of wire
------------------------------
Message: 2
Date: Tue, 22 Sep 2015 12:47:53 -0400
From: George Dubovsky <n4ua.va@gmail.com>
To: Spencer <w1gak@arrl.net>
Cc: towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
Message-ID:
<CAALHBrbv0tGnvySmBY=ipdOXgiZdqYhfvqSQjmnGhOoP+zVSuA@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
On Tue, Sep 22, 2015 at 12:42 PM, Spencer <w1gak@arrl.net> wrote:
0.0625" copper coated steel welding wire, 66# reel, ~$180. over a mile of
wire
?Great for welding, lousy for antennas. The copper coating is, like, one
copper atom standing on the shoulders of another, just enough to prevent
corrosion during indoor storage. It will rust following a heavy dew.?
?73,
geo - n4ua?
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------------------------------
Message: 3
Date: Tue, 22 Sep 2015 10:30:20 -0700
From: Jim Lux <jimlux@earthlink.net>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
Message-ID: <5601902C.5090803@earthlink.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
On 9/22/15 9:42 AM, Spencer wrote:
0.0625" copper coated steel welding wire, 66# reel, ~$180. over a mile
of wire
_
skin depth in copper is 0.0008 inches (0.8 mil) at 10 MHz
------------------------------
Message: 4
Date: Tue, 22 Sep 2015 12:09:24 -0700
From: dw <bw_dw@fastmail.fm>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: 80 meter wire antenna question
Message-ID:
<1442948964.2576161.390771417.1B6D477A@webmail.messagingengine.com>
Content-Type: text/plain
Hi Dick,
It sounds like you want to add some directivity.
Have you considered the Qaugi directive type antenna model?
I seem to remember at least one ham who setup a lot of wire
directionals.
And one of his big antennas was a quagi using a square loop as the
driven element and vertical sections for directors.
Seemed to me like he was very pleased with it.
Just a thought.
Sounds like a fun project!
N1BBR :-]
On Mon, Sep 21, 2015 at 6:25 PM, Dick Allardyce (N4RA) via TowerTalk <
towertalk@contesting.com> wrote:
Hi all,
I need some advice about a wire antenna for 80 meters. I have two 85'
towers that support a nearly-square80 meter full-wave loop broadside to EU.
It fits nicely, but the bottom is only about 10' off the ground. It's fed
in the center of one vertical sidewith a 1/4 wave of RG/11. It works well.
I'd like to hear of opinions or experience with adding awire parasitic
element at this low height. Specifically, I'd like to add a half-wave wire
yagi element spaced about .15WL that would be switchableto 3 different
lengths: phone director, CW reflector or phone ref/CW dir. I change the
physical size of the loop for CWor phone. I'd like to remotely
switchdirection (and mode) of the resulting antenna by changing the length
of theyagi element.
Any opinion as to the usefulness of a parasitic element ofthis design with
the whole thing so near ground? The yagi element will probably only be
about30' in the air. I don't expect 2 elementperformance, but I don't want
to bother if someone already knows it would be awaste of time.
73
Dick
N4RA