On 2014-02-04 11:02, Herb Schoenbohm wrote:
loss of signal results. I would also presume that the construction of
a
good CP antenna for 160 would be very difficult to perfect. I have
seen
some antennas for AMSAT work attempting to produce a CP type antenna by
have two interlaced yagis, one vertical and the other horizontal, one
space 1/4 wave in front of the other, and with a quarter wave delay
Herb Schoenbohm, KV4FZ
FWIW, I used to know a fellow who got his PhD in antennas working
under W8JK at Ohio State University. He worked on a very large HF
helix antenna that I believe was circularly polarized. It was basically
a cloud warmer pointed straight up. It was suspended from some really
large towers. This work was done in the 1950's or 1960's. I don't know
what the lower frequency limit of it was.
Rick N6RK
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