On Mon, 11 Jun 2007 10:10:02 -0500, "amdx" wrote:

Are beverage antennas useful at 10Mhz (length adjusted for frequency).
Do they still have the same pattern?
Do you still place them 6 to 10ft off the ground?
Still the same termination resistance and input impedance?

Hi Mike,

The characteristics are largely due to the proximity of earth, and its
conductive property which in HF is quite different from the original
design for LF. Having said that, there's not much you can do to alter
earth's conductivity over a long stretch (well, I suppose you could
try....) and the convention of a long, low antenna will still give you
some benefit - maybe - it needs only trying to determine.

The termination can be ignored unless you absolutely demand end-fire
performance (from one end, otherwise it is end-fire at both ends).

Here is a citation and discussion from my recent research in this
matter:
History of Radio, Gleason Archer
621.38409
pg. 121
"Ernst F. W. Alexanderson's Multiple Tuned Antenna for Marconi at
New Brunswick used six tuned down-wires at regular intervals along
a mile long antenna to increase its gain ten-fold"
pg. 140
"Along with a 200KW Alexanderson alternator, this was in 1918 the
strongest transmitter in the world, capable of being heard on
portable radios in the field."
pg. 146-147
"Harold H. Beverage & Anti-static tuned antennas with Chester W.
Rice.
'The Barrage Receiver'
Using a 10 mile long wire on the ground, they eliminated static
originating in the Caribbean that masked European signals."

Some may recognize Arthur's "Gaussian Array" in Alexanderson's design
(as certainly Arthur would not) and even more how the Yagi's
improvement consigned that array's fate to oblivion. Mike, you may
want to experiment with these tuned down-wires for yourself if you
choose to dabble with the Beverage. The 10 mile long wire on the
ground might be replaced with the standard resistor if you want to
build your own Barrage antenna.

In the course of some dozen years of correspondence here, I have never
seen any attributions to Alexanderson or Rice or their techniques.

73's
Richard Clark, KB7QHC