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Re: Topband: Antenna Help

To: Topband@contesting.com
Subject: Re: Topband: Antenna Help
From: <mapa50@windstream.net>
Date: Fri, 31 Jan 2014 19:53:21 -0600
List-post: <topband@contesting.com">mailto:topband@contesting.com>
I have an antenna that I originally built for 75m. It is 72 feet tall which is 
.280 wavelength instead of 1/4 wavelength. This gives a resistive feed point of 
52 ohms and an inductive reactance tuned out by a series capacitor.

  On 160m I use 34 feet of linear loading and a coil to make up the rest of the 
loading needed.


  On 40m I use enough linear loading to  bring it very close to 50 ohms and use 
3 turns of a coil to finish it up. It is more than a 1/2 wave, but less than 
5/8 wave and work nicely for DX.

  The antenna is remotely controlled from the shack. It is also switchable at 
the base as this is how I used it for a while and left this in place when I 
made it remote from the shack.

                                               73 es DX  Pat H. Armstrong KF5YZ


---- "Chortek wrote: 
> Thinking about a simple 30-160 meter vertical system with minimal compromises:
> 
> 60 foot tapered aluminum 1/4 wave in 80, plus,
> 
> Run two 1/4 wave wires from the base to standoffs mounted at the appropriate 
> heights, plus ,
> 
> Another wire from the base to the top with a standoff mounted there and three 
> top hat wires which double as guys (not connected electrically to the top of 
> the 60 foot vertical ).
> 
> All four "antennas" will either be tied together and fed at the base (against 
> an appropriate radial field) or switched in one at a time via a remote coax 
> switch.
> 
> Any reason this would not work as well as any of the verticals would if 
> installed separately?
> 
> Any thoughts welcome!
> 
> Bob AA6VB
> 
> Sent from my iPhone
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
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