Topband: Looking to improve TX antenna Efficiency

Rick Karlquist richard at karlquist.com
Tue Nov 20 14:45:03 EST 2012


Steven Raas wrote:

> Main Element: 32 feet vertical - 90 deg bend ( the 'L' ) which runs
> 43' horzontally pointing north. Then, another 90 deg bend, and
> ascending 26' in length ( from 30' up to about 11' above ground
> running from west to east. ), then..you guessed it.. another 90 deg
> bend that now runs to the south flat top for 27' ( @ 11' up )

This type of question is hard to answer because we don't know
what you are able to do.  If you are able to do it, I would
suggest changing from an inverted L to a T top loaded vertical.
This suppresses useless horizontally polarized waves and improves
the efficiency in terms of what is heard at the receiving end.
You may still need a coil at the base to achieve resonance if
can't put out long enough top loading wires.  That's OK.

Rick N6RK



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