> I find that for casual hamming the SteppIR's seem to work pretty well at
> 20-30 feet. For a contest I might crank it up if it were mild out.
I did a bunch of A/B testing of inverted vee's at 30 and 60
ft on the same mast. The increase in height helped on the
average of a few dB on 20 (not a huge difference) but helped
substantially as the frequency went up, such as on 15 meters.
Assuming you could extrapolate the results to Yagis (and I
don't see why not), then it gives you an idea of when it
is worth cranking up.
I also notice that operating mobile, I do a lot better on
20 meters than the higher bands. This seems to be in line
with the inverted vee tests.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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