Topband: circular polarization on 160m

[Richard Karlquist]

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