[TowerTalk] HF Antenna Height.

[Barry Kirkwood]

An interesting thread.

Many years ago the British publication "Short Wave Magazine" reprinted an
article from a DL source which looked at antenna height using a typical trap
tribander in terms of "bang for a buck". I cannot remember the precise
methodology, but believe it was based on pooled data of signal strengths
from a number of Eu stations. Remember that computer modelling of antenna
patterns was in its infancy at the time, and ionospheric prediction
simplistic by modern standards.

However, I do recall the result which indicated that around 45 ft height
gave a good result in that performance on 14, 21 and 28mHz fell off quite
rapidly below this level while incremental improvement with height above
this level was slower. ie. there was a gentle inflection in the curves
around 45ft.

FWIW, the conclusion was that where resources were limited the best return
for effort would be to go for a mast or tower height between 40-50ft.

73
Baz ZL1DD




end
Barry Kirkwood PhD ZL1DD
Signal Hill
66 Cory Road
Palm Beach
Waiheke Island 1240
NEW ZEALAND
www.waiheke.co.nz/signal.htm


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