Topband: Suggestions for a tower?

[Jon Zaimes AA1K]

Jaan,

Before replacing the guys, you might consider trying a gamma match at 
the bottom end of one of the top guy wires to load the tower and guys 
as-is. I did something similar on a sailboat for 80 meters (gamma 
matching the rigging on a 35-foot-high mast)  and it worked OK.

73/Jon AA1K


On 4/23/2014 8:15 AM, Jaan Jürgenson wrote:
> Hello low banders.
>
> My name is Jaan and I have been reading all kinds of interesting things
> regarding propagation, antennas and other topics here on this reflector. I
> hope to receive some valuable comments, recflections and also hands on
> experience on my question.
>
> Last winter I became active on 160 and found it very exciting with
> propagation and activity on this band. What I would like to ask is what
> would You propose for antenna?
>
> Background:
> I have a tower that is 137ft. or 42m tall. It is triangular 1ft 10inches or
> 40cm wide. The tower is guy wired at three levels with non-isolated wire.
> The foundation is a concrete slab on on rocky ground.
> The surroundings is quite flat and conductivity is perhaps not the best.
> About 1/2 mile away I have the Baltic Ocean in almost 360 degrees.
>
> My question is what options do I have to build a good TX antenna out of
> this? What can I do? On RX side I will use separate antennas.
> I could think of isolating the guy wires or replace them for non-conductive
> type. I'm not sure if it possible to isolate the base today. Shunt fed the
> tower, use it as a folded monopole? Or should I just use the tower as a
> support for a L-antenna?
>
> 73 de Jaan, SM0OEK
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