Hi folks, Thanks a lot for all answers and information! Some I still have to read more accurate ana translate some special parts, because, as you can obviously read from my post, my English is horrible.
I tend - and of course my wife does - to have a fixed installation. So extendable fiberglass masts or something like this is not the solution we are searching for. I will think about all suggestions, try some of them and report later this year, if there are any reporting worth solutions. We take over the boat during the next 2 weeks and after that, there is a lot of other marine stuff to do, before focusing on ham radio on board). Further answer are highly welcomed 73, Peter -----Ursprüngliche Nachricht----- Von: Kurt Pawlikowski [mailto:ku...@pinrod.com] Gesendet: Dienstag, 9. Juni 2020 03:16 An: Peter Kaletsch <pkalet...@kaletsch-gmbh.de>; elecraft@mailman.qth.net Betreff: Re: [Elecraft] K3 working on motorboats - possible Peter, In general, any vertical works lots better with more radials. As fresh water is a fairly poor conductor, the more the merrier! Unfortunately, because most boats are wooden/fiberglass, what you can add helps. I don't know if they have to be 1/4 wavelength (I've read yes and some say at least 0.20 wavelength). For HF, this would be some serious lengths for most boats! I expect you'd have to load them similar to the vertical element, but I haven't read anything regarding loading radials: It's just a guess. I suppose one could attempt to replicate, to some extent, a solid ground plane with foil or some other conductor (maybe chicken wire?). It would seem a lot of work (and probably is!). If you're insistent on a vertical, it's a narrow field of variability. Some of the portable antenna's can make loaded dipoles or verticals, which would operate fairly well without a ground plane. Another option might be a magnetic loop (which doesn't care much about "ground" per se. It is affected by near-by conductors, tunes very narrowly, and is big (compared to a mobile vertical). So, whatever you choose, it's all some sort of compromise. kurtt WB9FMC On 6/8/2020 3:47 PM, Peter Kaletsch wrote: > Hello fellows; > > You are my last hope as I cannot imagine that I am the only one in the world > who wants to try that. > > For many months I have been trying in vain to get tips on how to operate a K3 > well on a small 13 meter motor yacht. I am talking about fresh water usage > (Lake Garda in Italy), not salt water, and of a GFK built boat. > > A dipole is eliminated, it is not a sailing boat. I thought of using a > Tarheel Antenna, but the manufacturer advised me against it. > > So normal, shortened mobile antennas, mounted on the device carrier, where > also the antenna for marine radio is located, should point the way ...? > > But how do I get a reasonably effective earth? I read a lot of negative > things about ground plates - fast growth, the hull has to be pierced. > > I have already considered laying radials from the antenna base below deck in > the invisible area, but will this work...? > > I am very grateful for every tip and every help - also to > pkalet...@kaletsch-gmbh.de > > Thanks in advance > > Peter - DL1MDZ > > > ________________________________ > Peter Kaletsch GmbH | Fürstenrieder Straße 275 | 81377 München | Tel: > +49 (0) 89 / 89 60 93 - 0 | Fax: +49 (0) 89 / 89 60 93 - 99 | > i...@kaletsch-gmbh.de | Handelsregisternummer HRB 108093 | Amtsgericht > Muenchen | Steuer-Nr: 143/170/40017 | Geschäftsführer: Peter Kaletsch | Sitz > der Gesellschaft: München | Hinweis / reference: > Die Inhalte dieser Nachricht dürfen nur für die beabsichtigten Zwecke > verwendet werden. The content of this Message may only be used for the > intended purposes. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > ku...@pinrod.com ________________________________ Peter Kaletsch GmbH | Fürstenrieder Straße 275 | 81377 München | Tel: +49 (0) 89 / 89 60 93 - 0 | Fax: +49 (0) 89 / 89 60 93 - 99 | i...@kaletsch-gmbh.de | Handelsregisternummer HRB 108093 | Amtsgericht Muenchen | Steuer-Nr: 143/170/40017 | Geschäftsführer: Peter Kaletsch | Sitz der Gesellschaft: München | Hinweis / reference: Die Inhalte dieser Nachricht dürfen nur für die beabsichtigten Zwecke verwendet werden. The content of this Message may only be used for the intended purposes. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
