"More then once I burned a loading wire.... over the years I had that
configuration." The solution for this is a wire cage as it does most of
the radiating rather than the tower itself. It is also easier to feed
with a simple network especially if you find the sweet point tap.
The problem is the voltage at the top of the tower. A cage does not
guarantee the voltage would be zero, because the Yagi would be up outside
the cage. In a similar fashion, an Inverted L would not guarantee no
damaging voltages.
Floating element antennas are often some sort of issue. I would never build
one floating that way, if for no other reason than insulator failures from
external common mode.
73 Tom
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|