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Re: [TowerTalk] Shunt Feeding, Can this be?

To: Gary.Stone@med.va.gov, donhall161@sbcglobal.net,chilesp@adelphia.net, towertalk@contesting.com
Subject: Re: [TowerTalk] Shunt Feeding, Can this be?
From: ersmar@comcast.net
Date: Tue, 15 Nov 2005 22:57:36 +0000
List-post: <mailto:towertalk@contesting.com>
Gary:

     Sorry - but shunt feeding doesn't work in your part of Texas.

     I'm just kidding.  But if your 45G means Rohn 45G tower, I'm assuming then 
that your tower is properly guyed.  If so, then I believe your first step would 
have to be to insulate the tower from all your guy wires by replacing them with 
Phillystran or similar, or installing multiple porcelain insulators in each guy 
wire.  And a bunch of other steps that I'm not familiar with.

     My tower, and all others that I know to be shunt-fed, are self-supporting, 
unguyed structures.  All the shunt-feeding tricks I've learned here on 
TowerTalk apply to that type of support.  

     Perhaps others around here have been able to shunt-feed their guyed towers 
and will jump in.  Or maybe you would be able to install an inverted L or some 
other wire antenna off your tower.  

     How about a little bit more info on your tower?  

73 de
Gene Smar  AD3F



> OK, with all this talk about shunt feeding - maybe I am ready to take the
> plunge.  I am usually not so stupid but I have read about shunt feeding and
> end up with more questions than answers.
> 
> My tower is a 45G with an Optibeam OB17-4 on top (40 foot boom - 17
> elements) and then a WARC-7 (7 elements on a 14 foot boom) about 12 feet
> about the Optibeam.  So, quite a bit of top loading and with 80 foot tower I
> have wondered about shunt feeding for 80 and esp 160 meters.  
> 
> Can someone point me to a good step by step resource and will you also
> answer my questions afterwards?  I would love to do better on 160 meters.
> 
> I am about 70 miles north of Dallas, Texas.
> 
> Gary, N5PHT
> 
> 
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of donhall161
> Sent: Tuesday, November 15, 2005 4:04 PM
> To: ersmar@comcast.net; Pat Chiles; towertalk@contesting.com
> Subject: Re: [TowerTalk] Shunt Feeding, Can this be?
> 
> My shunt fed tower had similar BW. Worked like a charm (over 190 countries 
> from two locations in Texas). Like Gene, I don't ask, just enjoy.
> 
> 73  Don  K5AQ 
> 
> _______________________________________________
> 
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
> questions and ask for Sherman, W2FLA.
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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