On Mar 12, 11:21*pm, Bill wrote:
Hi,
* * * * *does any one have constructive comments about this type of
aerial?

http://www.bwantennas.com/ama/fdipole.ama.htm

How would it compare against a dipole dedicated to a specific frequency
for instance? I assume not as well, *but how much less?

All sensible replies much appreciated, thank you.

Generically that antenna is a T2FD.

It has a power resistor in it. A certain amount of power (or, on
receiving, sensitivity) is lost in that resistor.

http://www.cebik.com/wire/t2fd.html has some detailed simulation
results for T2FD's, showing SWR vs frequency and power dissipated in
resistor for frequency.

Having tried some multi-band antennas in the past, I strongly feel
that what the vast majority of hams actually want is an all-band
doublet: http://www.cebik.com/wire/abd.html

I put an all-band doublet up a few months ago and am so, so, so happy
with it that there are no words. It loads up easily on 80M all the way
up to 10M and again I'm so so happy with how it works.

Tim.