Jim, K9YC wrote:
"My Beverages are up around 8 ft so that they clear the deer. They're
good on 160, OK on 80, and almost useless on 40."
==========
Before neighbors encroached, I had five Beverages up in "critical"
directions (EU, ZS, LU, ZL/VK & JA). They varied from 550' to 1100' long
and were all 7' high. They were all made of #17 AWG galvanized electric
fence wire, and all had an extremely good F/B, F/S and S/N ratio on 160m.
All were terminated with a 330-ohm resistor, the value of which was
determined by walking down the wires measuring field strength while a
slight amount of RF at 1830 kHz was applied. The soil conductivity here
in the Mojave Desert and "poor".
I remember that, during one all-band CW DX constest that after sunset in
JA that the JA's caused severe QRM to the EU stations on 40m while using
my 40m 2-el 402BA beam for receive. When I switched to receive EU on my
EU Beverage, the QRM from JA disappeared and I had no trouble copying EU
on the Beverage. So, in my case, the Beverage(s) were quite useful on
160, 80 and 40m.
Once I replaced my longest (1100' on ZL/VK) Beverage with solid copper
#16 AWG wire, expecting an improvement in the performace of that antenna,
but I was dismayed to find that its F/B, F/S and S/N were nowhere near as
good as with the galvanized wire. Therefore I always recommend using
galvanized wire for your single-direction (non-switchable direction)
Beverages.
As development (neighbors) of my area required that I remove all of the
Beverage wires, I still "sneak" a temporary one in now and then. This
really paid off one time when I installed a 550-footer 2 feet high to
snag VK9YY on Cocos-Keeling which could not be heard on any of my other
antennas.
73, de Earl, K6SE
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