Topband: Antenna Help

[mapa50 at windstream.net]

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
> _________________
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