[Elecraft] WG: K3 working on motorboats - possible

[Victor Rosenthal 4X6GP]

Peter,

One possible solution is a fiberglass vertical antenna (6m or more if 
possible) and two shortened radials. The radials can be as short as 0.10 
wavelength at the lowest frequency, which might allow you to position 
them fore and aft on the boat. Naturally, you should make sure nobody 
can contact them while you're operating! The radials are connected 
together and fed through a common inductance to achieve an electrical 
length of 1/4 wavelength for each of them. Moxon discusses this type of 
counterpoise in his book "HF Antennas for all locations."

You could use a remote tuner at the base, or if the cable is very short, 
the tuner in the radio, to resonate the whole system. You would have to 
adjust the inductor on the radials as well to change bands.

I had a 40m vertical which used a 1/4 wavelength vertical element with 
four radials which were each only 3m long, fed through a common inductor 
as described. My radials were about 4m above the ground. It worked quite 
well.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.

On 09/06/2020 2:14, Peter Kaletsch wrote:
> Hi;
> 
> Thank you very much for the feedback and suggestions.
> 
> The suggested setup is surly good for testing, but I would prefer a
> permanent installation more and I am very sure, my wife also does Or
> should I say, I am sure, it's a must for here :-). And also the AX-1
> limits the output to 25 watts...
> 
> Best regards
> 
> 73, Peter
> 
>