On Thu, 12 Jan 2006, Stephen W. Kercel wrote:
[...] don't be too enchanted by the low angle pattern, it is also a bit
lossy. If you overlay your EZNEC vertical dipole elevation pattern with
the EZNEC broadside elevation pattern of a straight dipole at say 5/8
wavelength elevation, you'll see that although the vertical concentrates
its energy at low angles, the actual dBi values are not that much better
than the horizontal.
Indeed, a low dipole generally has much better low angle output than
a vertical, but is a lousy dx antenna b/c it isn't a selective listener.
This has lead me to consider using a vertical for listening, and a low
dipole for trasmitting.
I've been lead to believe that polarization has little effect on HF
reception and propagation outside of the ground wave radius, so next Field
Day, I'm hoping to see if we can't use the above arrangement to kill two
birds with one stone when working dx. By making t/r antenna switch boxes
for all of the rigs, it should be possible for us to reduce cross-station
interference, and have more low angle punch, by having both stations on a
given band tx on dipoles and rx on verticals.
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
