RadioBanter - View Single Post

May 9th 04, 08:26 AM

(JGBOYLES) wrote in message ...
....
A 100mhz antenna has several hundred khz bandwidth using #8 wire, but try a
dipole on 1.8 mhz using #8 and you have 10-20 khz.

1.8MHz dipole with 8AWG wi just use three parallel pieces, spaced
about a foot apart...or make a "bowtie" out of the 8AWG. Or use a
steel cable center core and a cage of cheap 14AWG wires around it.
There ARE cures for narrow bandwidth in wire antennas. Of course, it
may be simpler to just use a matching network ("tuner"), since the
efficiency and pattern of even the simple single thin wire dipole
doesn't depend much of frequency within an HF band.

You have choices here, and I don't much care for generalities that
unnecessarily limit the choices. Just because one person wants to use
a tuner, and retune after any QSY greater than 20kHz doesn't mean
another who wants to use a broadband system should be discouraged from
doing so.

Cheers,
Tom