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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