How good is dacron rope, as an insulator for HV? I am planning on using
.3125 dacron rope as an overhead truss for the shortened 80m rotary dipole.
One length going out each side of the mast. They will terminate on the mast,
aprx 4 ft above the 80m dipole, with a small turnbuckle on each side of the
mast.
The other ends will terminate 15 ft out each side of the main trunk section,
which is 2 inch OD tubing. This will also be just a few inches inboard of
the T bar
capacity hats. Balance of loading is done with the tornado drive, which
consists of a pair of compressible 6-12 uh coils at the feedpoint.
Going out 15 ft will be at a HV point, esp since thats also way outboard of
the 6-12 uh coils at the feedpoint.
Will 15 ft be enough to stand off the peak V....esp when soaking wet ? IF
each side is opposite polarity, then it gets even worse, as the potential
difference
right at the mast could be substantial under some conditions. Or do I need to
install an insulator on either side of the mast, right at each turnbuckle ?
Id rather not have to install insulators if not required, but have no
experience with dacron + HV.
Jim VE7RF
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|