ARRL has a nice discussion on height/efficiency, put together as a tool in
fighting antenna ordinances.
http://www.arrl.org/FandES/field/reg...al/antplnr.pdf.

60 feet is a good place to start.

Phil, KB2HQ

"Bill Grimwood" wrote in message
...
I am condidering putting up a tower and what is the recommended height for
a
20 m yagi. Also I want a fold down tower, do you have some brand and
model
recomendations. I do not know anyone who has one.

73


Bill
W4WEG