im ny life i have never been is a quieter radio location than rarotonga!
mike w7dra
On Wed, 13 Aug 2014 09:47:06 -0400 "Tom W8JI" <w8ji@w8ji.com> writes:
> > this brings back a lot of memories..........i arrived on rarotonga
> a week
> > after a French Dxpidition did, who was set up in the K2KW motel
> room with
> > vertical antennas on the beach just as you would imagine. the
> motel
> > management said she was sorry, and set me up in a cottage (from
> the same
> > motel) on the other side of the island for me and my venerable
> HW-16, now
> > connected to a 400 foot long wire to a 100(?) foot high palm tree.
> i was
> > across a road to the beach (75 feet from the shore?), but could on
> 160m
> > easily hear the USA 579 two hours before sunset
>
> Receiving is virtually always a matter of signal-to-noise ratio in
> the space
> around the antenna. The only cases where more antenna efficiency
> helps is
> when the external signal **and external noise** is so weak it is
> near system
> internal noise.
>
> High conductivity earth can actually hurt S/N ratio because it
> extends
> ground wave far more than it changes higher angle signals.
>
> Transmitting is a different story, if lower angles are used. I
> doubt,
> however, it is ever close to 10-20 dB unless it is groundwave
> propagation.
> I'm sure people somewhere have actual numbers on that.
>
> 73 Tom
>
>
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