>I forgot to tell you that I have a single KT-34a that is on an 89 foot
>self-supporting crank up tower. I have at times put in a coax switch that
>allows A/B testing. When I am working a European pileup in the middle of an
>opening, I will typically see about 10 dB in favor of the stack. When the
band
>is just starting to open or close, I will see as much as 30 dB difference in
>both rcv and tx. That is due entirely to the very low angle which is
similar
>to a single yagi on a very high hill like you mentioned.
Very interesting Mike.
So far at my place I have not seen such dramatic differences between a
single yagi at any height as compared with any other antenna or stack of
antennas. My station is located on a very steep hilltop, and this is
probably the reason I don't see the differnce. In Terrain Analyzer, I can
take a 40 meter beam anywhere from 60' to 120' and see very little
difference in the forward lobe produced. W6NL (W6QHS) asked me the other
day if I thought my stacks were worthwhile on the hilltop. Mostly, I think
they make very little difference. I think Dave already knew this... he has
no stacks.... he is VERY loud.
73
Bill - W4AN - K4AAA
Bill Fisher, W4AN (EX KM9P)
http://www.contesting.com
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