On Wed, 22 Nov 2006 01:01:56 +0000, Dave Oldridge wrote:

The loaded folded dipole idea is actually quite efficient if you stay above
the "knee" frequency. This is about .5 wave at the lowest frequency.

Good evening, Dave.

But, isn't there another frequency, around 1 full wavelength at the
operating frequency, above which efficiency starts to go to pot again?

125 ft (which you suggested in another message) is a full wave at
something a shade under 8 MHz, well within my upper limit of 9 MHz. So,
how will a 125-foot T2FD operate in the range of, say, 7 to 9?