Good day
last October I made my ham radio licence. Whatever, hard stuff.
Of cause my main idea is to bring the ham radio onto Colomba (C&C34) and
I`m wondering ho to install the antenna. Perhaps someone had same idea
and some solutions.
In the moment I`m modelling the boat incl. rigging with 4nec2 and the
results are interesting ... and a little bit confusing. Up to now I made
two setups of antennas, one separate on the stern with max 8m long wire
in a glasfibre tube, app. 10° showing aft from the vertical. I`m not
very pleased to have such antenna, much to complicated for mooring etc.
Also it seems that this antenna will not work without a huge ammount of
losses even if matched by an antenna tuner.
The other possibility is to use the aft stay. It`s isolated, so in
general no problem. But, it`s funny ... isolated no chance to match it
on 40m band, 80m is possible but not really good. 20,15 and 10m are
working. Than I`ve tried to use the aft stay without an isolation in the
top. Result was interesting. 80m working good, 40m perfect, 20 and 15m
do not work, 10m excellent. That the 10m is working coupled to the whole
rigg is realy surprising me. My idea is now to place a relais in the top
to have a circurit with the rigg or to isolate the aft stay. Of cause,
under all circumstances I have to match the antenna with an automatic
tuner, but I want to reduce losses in the tuner as much as possible.
Perhaps someone has his/her own experience and can give me some
advices. If someone is interesting in the nec file, please give me a note.
best regards
Peter
DO3GP
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