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