[Elecraft] K3 working on motorboats - possible

[W2xj]

i think your engineering challenge is primarily balancing esthetics against performance.

Sent from my iPad

> On Jun 9, 2020, at 6:52 AM, Peter Kaletsch <PKaletsch at kaletsch-gmbh.de> wrote:
> 
> 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:kurtt at pinrod.com]
> Gesendet: Dienstag, 9. Juni 2020 03:16
> An: Peter Kaletsch <PKaletsch at kaletsch-gmbh.de>; elecraft at 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
>> pkaletsch at kaletsch-gmbh.de
>> 
>> Thanks in advance
>> 
>> Peter - DL1MDZ
>> 
>> 
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> ________________________________
> Peter Kaletsch GmbH | Fürstenrieder Straße 275 | 81377 München | Tel: +49 (0) 89 / 89 60 93 - 0 | Fax: +49 (0) 89 / 89 60 93 - 99 | info at kaletsch-gmbh.de | Handelsregisternummer HRB 108093 | Amtsgericht Muenchen | Steuer-Nr: 143/170/40017 | Geschäftsführer: Peter Kaletsch | Sitz der Gesellschaft: München |
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