An inexpensive antenna to try is MFJ-2240 Mini-Dipole for 40 meters for $70. It is made with two hamsticks and appropriate mount that mounts the two whips butt to butt with coax connection. There is also models for other bands. https://mfjenterprises.com/products/mfj-2240 Mount as high as practical, dipole will be horizontal and about 16' long. Pete W4WWQ
----- Original Message ----- From: Peter Kaletsch <[email protected]> To: <[email protected]>, <[email protected]> Sent: 6/9/2020 4:29:01 PM Subject: Re: [Elecraft] K3 working on motorboats - possible ________________________________________________________________________________ Hi Gernot! You pointed the problem out! I have done really a lot of QRP work (DXCC, all continents) landside and of course I will start with low power on board. Many thanks for your advice to the "Rothhammel". I did not know, that marine antennas are a theme there, but I will have a look into for sure! Best regards Peter -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Gesendet: Dienstag, 9. Juni 2020 22:21 An: Peter Kaletsch <[email protected]>; [email protected] Betreff: Re: [Elecraft] K3 working on motorboats - possible Hello Peter, I think it depends on your willingnes to sacrify the shape of your boat. If you want to get heard anywhere then you either need a long vertical plus good ground as mentioned already, or a dipole as high above sea level as possible. The dipole may be sloped but either the feedpoint needs to be elevated or the ends of the wire. I have operated both configurations near fresh water with kind of satisfaction (~500km on 7/14 MHz are possible on 10Watts) , but not yet on a boat. The Rothammel also mentions "Marineantennen" and discusses the grounding and antenna suggestions. Seems like an interesting experiment, hope you get on the air soon! 73 Gernot DF5RF BTW, you can use www.deepl.com for a quick translation to German: "Ich denke, es hängt von Ihrer Bereitschaft ab, die Form Ihres Bootes zu opfern. Wenn Sie irgendwo gehört werden wollen, dann brauchen Sie entweder eine lange Vertikale plus guten Boden, wie bereits erwähnt, oder einen Dipol so hoch über dem Meeresspiegel wie möglich. Der Dipol kann geneigt sein, aber entweder der Speisepunkt oder die Drahtenden müssen erhöht sein. Ich habe beide Konfigurationen in der Nähe von Süßwasser mit einer gewissen Befriedigung betrieben (~500km auf 7/14 MHz sind bei 10Watt möglich), aber noch nicht auf einem Boot. Der Rothammel erwähnt auch "Marineantennen" und bespricht die Erdung und Antennenvorschläge. Scheint ein interessantes Experiment zu sein, Ich hoffe, Sie gehen bald auf Sendung! Übersetzt mit www.DeepL.com/Translator (kostenlose Version)" Am 08.06.2020 um 22:47 schrieb Peter Kaletsch: > 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 > [email protected] > > 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 | > [email protected] | 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:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to [email protected] ________________________________ Peter Kaletsch GmbH | Fürstenrieder Straße 275 | 81377 München | Tel: +49 (0) 89 / 89 60 93 - 0 | Fax: +49 (0) 89 / 89 60 93 - 99 | [email protected] | 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
