Sailing Boat Antenna Help

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by 2E1HPS, Apr 21, 2020.

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  1. 2E0CIT

    2E0CIT Ham Member QRZ Page

    I've just had an idea!
    Haven't tried it yet. (my wife is demanding my attention!)
    Just for fun ....could tune in to the WEFAX frequency using the Twente online SDR http://websdr.ewi.utwente.nl:8901/ and use the computer mike to feed signals into FLdigi.
    :)
     
  2. 2E1HPS

    2E1HPS Ham Member QRZ Page

    Looking at chokes for the frequency 490 to 518kHz (Navtex) I found a document from K9YC recommending using FR240-75 with 18 turns of RG400. I also was looking at the work by G3TXQ and he seemed to recommend the opposite end of the ferrite numbering going for 4 off FR240-31 with 17turns of RG58.

    any one have any experience of chokes around this frequency or even the 630m band?

    Also is a good transmitting choke a good receiving choke?

    Thanks

    Sources below:

    https://www.google.com/url?sa=t&sou...Vaw1cLuZCa0ivCrehWw1KGWvq&cshid=1587674193203



    And

    http://www.karinya.net/g3txq/chokes/#inductive_chokes
     
  3. K7KBN

    K7KBN Ham Member QRZ Page

    You'll be able to see what's connected to what when the boat's being modified. Don't worry about connecting the ground plates to the antenna/aerial; the wiring and feedline should take care of that. The negative side of the battery/batteries should be solidly connected to the engine. What is the hull made of - wood, fiberglass or metallic? I'm not sure about the engine being connected to an "anode".
     
  4. 2E1HPS

    2E1HPS Ham Member QRZ Page

    It's all made of Fiberglass with wood trim inside. The boat is out of the water at the moment as I'm just giving it a refit just had a new engine and thought I'd do all of the radio radio equipment also.
     
  5. WB5THT

    WB5THT Premium Subscriber QRZ Page

    It's been many years since I rebuilt the sailboat, search for standing rigging backstay insulators - it's an off the shelf product.
     

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