Dave, You signals are great on 160 night after night with QSB of
course. You might wish to try some spider wires hooked to you ground
both at the feed point and the termination point. Four or five wires
about 60 feet or more fanned out in the RX direction should stabilize
the need for a ground. BTW I have two Beverages your way and the 900
foot does very well but the 500 foot is worthless. The same results on
80 meters but not as severe. The spider approach will help in
establishing better earthing stability on both ends of the Beverage.
any wire will do even pieces of CAT 5 cable with the wires twisted
together and laying on the ground.
If you have additional ground rods of even pieces of rebar you can add
to your ground in a five foot distance from the main termination.
Improving the grounding on each end may help your situation. Also make
sure your Beverage run is not near any other noise source or vertical
antennas. At least a 100-200 foot separation may help in your
circumstance.
On behalf of all those you have worked and the hopeful still trying, the
greatest respect for putting Uganda on the air on TB and concentrating
on 160 as you have. So many DX-peditions just give up after the first
problem working stations on TB and look for a higher Q-rate on higher
bands. Your devotion to 160 is awesome.
Regards,
Herb Schoenbohm, KV4FZ
On 2/10/2013 5:05 AM, Dave wrote:
Hi All,
My team is currently on DXpedition to Uganda 5X8C
We have erected receive antennas here in 5X with very poor success. W e have
used the same antennas at other places with great success. Please read below
and if you can offer some constructive suggestions please reply to me and copy
reflector. Davek4sv@yahoo.com
We are experiencing some weird problems with our receive antennas. We have a
beverage about 540 feet long, terminated properly about 5 to 6 feet over the
ground. I have built plenty of these at my house, they all work. This one
here does not. It hears noise but no signals. Once In a while you can hears
signals.
So put you're receive antenna hat on. We suspect the ground is the problem.
We are located on the shore of Victoria Lake at a resort. The soil appears to
be sandy but with fresh water lake nearby. 200 feet. The beverage is in the
clear away from large metal objects.
With a 510 ohm termination we measure about 235 ohms when looking across the
termination resistor. Using resistor theory essentially we have two
resistances in parallel. The wire , termination transformer, ground rods and
ground are about 500 ohms. Having not measured this at home I'm not sure if
this is too low or too high of resistance.
We erected a Flag 29x14 feet mounted just above the ground. This is purported
to be ground independent. Our tests last night indicate this antenna is not
hearing very well either.
We are soliciting suggestions. We only have a small amount of wire and other
antenna stuff, no Home Depot or Radio Shack around. Perhaps we can build a
ground independent antenna that does not care what it sits on.
We have or can source some wooden poles to make wire radiators.
The 5X8C team thanks you in I
Thank You in Advance,
Dave Anderson, 5X/K4SV
Sent from my iPad in Uganda
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