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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