On Wed, 6 Apr 2011 03:56:21 -0700 (PDT), "
wrote:
Let's say I build a horizontal dipole, trimmed for minimum SWR @
7.200 mhz. I'll probably use 14-16 gauge insulated house wiring for
this antenna. It'd be a "nominal' quarter wavelength per leg.
This dipole will be fed with 50 ohm coax, and it will be erected
horizontally, 30 feet high over "average" ground.
What SWR reading could I expect to see from this antenna if I tried
to use it at 21.300 mhz........in the same environment as stated
above?
Thanks, folks......
FjLee KA0FPJ
Just put it up and see what happens.
Slap a tuner in the line.
Or check out a fan dipole.
Or buy a pair of 15 meter traps and use the design sheet that comes
with them to build a 40-15 trap dipole.
http://www.unadilla.com/?p=34