Leg insulators are not the way to go for a 160 m. hot tower. You need
a tapered bottom section on a single point Lapp or Austin insulator
that fits on a pin base attached to a concrete pier. To get an idea,
just go to google images and type in AM tower base. The tower has to
be able to rotate and allow for compression and expansion which a
single point does. It's probably cheaper to forget Rohn 45 and go
with 25, because the bottom taper section and insulator and sections
will be less expensive. You can't use a top section upside down
because they aren't designed for that and the swaging of the sections
will result in water running down and into the leg overlaps.
If you don't want to do any of this you can put up the R45 tower on a
pin and base plate as usual uninsulated, and skirt feed it with
insulated standoffs running up each side of the tower holding wires
that are bonded to each other to make a wire cover around the tower
that's floating above ground. you'll have to break up the guys with
insulators or use RF transparent guys. If it were me I'd put up a
free standing skirt fed tower.
73
Rob
K5UJ
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