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[Towertalk] Shunt Feed Tower

To: <towertalk@contesting.com>
Subject: [Towertalk] Shunt Feed Tower
From: n4kg@juno.com (n4kg@juno.com)
Date: Wed, 23 Oct 2002 22:55:03 -0600
The voltage across the capacitor will depend on
how much capacitance is needed to tune the antenna
and the power applied.  Plate SPACING will also be a
factor in breakdown voltage.  I had NO problem with
a LARGE air variable used on a Gamma Matched 130 ft
tower.

Tom  N4KG

On Wed, 23 Oct 2002  Phil - KB9CRY <kb9cry@attbi.com> writes:
> If I may point out another item.  You mentioned that you're using air 
> 
> variables.  Those will be OK as long as you limit your power to 100 
> watts or so.  If you're going to use an amp, then you'll be pumping 
> 3Kv 
> at some amperage through those, especially the series (gamma) cap.  
> If 
> this is the case, then you'll need to procure vacuum variables with 
> at 
> least 3Kv or 5Kv rating.  I did the air variable bit, and on 100 
> watts 
> it was acceptable.  When I eventually brought an amp online, the 
> arcing 
> across the cap plates could be seen from the house!  You'll see.  Cu 
> on 
> Topband, Phil  KB9CRY
> 
> Jim Johnson - KC4HW wrote:
> 
> >Want to thanks everyone for the help on the tower.  We added the 
> >additional air variable as an Omega Match and is worked real good. 
> >
> >We are planning to be on 160 during the CQWW SSB..
> >
> >Thanks again for the help.  
> >
> >Jim Johnson, KC4HW
> >Melbourne, Florida
> >http://www.kc4hw.net
> >DXCluster RF Connection: 144.95
> >Telnet://kc4hw.homelinux.net:8000
> >_______________________________________________
> >AN Wireless Self Supporting Towers at discounted prices, 
> >See http://www.mscomputer.com 
> >
> >Wireless Weather Stations now $349.95. Call Toll Free, 
> >888-333-9041 for additional information.
> >_______________________________________________
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> >Towertalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
> >
> 
> 
> _______________________________________________
> AN Wireless Self Supporting Towers at discounted prices, 
> See http://www.mscomputer.com 
> 
> Wireless Weather Stations now $349.95. Call Toll Free, 
> 888-333-9041 for additional information.
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
> 


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