I ran across this 'question' on a forum. The general consensus
appears to be the same in both places. Typically, bigger is better,
to some ridiculous point. Higher is also better to some ridiculous
point. Just depends on what you have available for the antenna and
placing the antenna, and what it'll be connected to. And, there's no
simple, cheap, small antenna that does -everything- well from day-
light to dark. My main purpose was any rules-of-thumb (ROT, I like
that one!) that apply to antennas in general. Depending on just how
'general' you want to be, I think it's been covered.
- 'Doc