[TowerTalk] 80 meter antenna

Tom Martin tmartin at chartermi.net
Wed Sep 23 12:24:01 EDT 2015


Dick, Why not suspend two 80 meter quad elements between the two 
towers?  You can add a relay on one loop( director) and switch in a pair 
of lines to equal a reflector.  Two directions.  I think that a 
parasitic element at 30' would be a waste of time.

Good Luck.

73,

Tom W8JWN

On 9/23/2015 11:00 AM, towertalk-request at contesting.com wrote:
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>     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 at arrl.net>
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
> Message-ID: <560184EF.1020908 at 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 at gmail.com>
> To: Spencer <w1gak at arrl.net>
> Cc: towertalk <towertalk at contesting.com>
> Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
> Message-ID:
> 	<CAALHBrbv0tGnvySmBY=ipdOXgiZdqYhfvqSQjmnGhOoP+zVSuA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Tue, Sep 22, 2015 at 12:42 PM, Spencer <w1gak at 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 at earthlink.net>
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Using steel e-fence wire for antenna wire
> Message-ID: <5601902C.5090803 at 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 at fastmail.fm>
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] [Bulk] Re:  80 meter wire antenna question
> Message-ID:
> 	<1442948964.2576161.390771417.1B6D477A at 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 at 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
>>>>



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