Salt water plus zero noise is magic..

Discussion in 'General Technical Questions and Answers' started by KL2WX, Jul 22, 2021.

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  1. KL2WX

    KL2WX Premium Subscriber QRZ Page

    Had an incredible weekend working some POTA on a couple of beaches here! I'm hooked. How close do I need to be to the salt water to get the HF magic sauce on 20m with a vertical? To wet tidal flats behave similar to actual salt water or does the tide need to be in to count?
     
  2. VK3YE

    VK3YE Ham Member QRZ Page

    The answer is as close as possible.

    I haven't done detailed tests with fixed antennas myself but an account from someone else said closer than 1 wavelength.

    I have however done pedestrian mobile experiments with a vertical involving contact with salt water.

    Much better when standing in it when contact is made to it. Wet tidal flats would be much better than dry sand.

    Here is a pedestrian mobile demonstration on 7 MHz in and around salt water:



    More on that particular antenna here: https://vk3ye.com/projects/projwade.htm
     
    N1VAU likes this.
  3. KP4SX

    KP4SX Premium Subscriber QRZ Page

    As youngsters vacationing at Myrtle Beach in the summer the only good music station was WAPE-690 from Jacksonville, FL. It came in like a local down on the beach by the water but a couple hundred feet inland it was ruff copy.
     
  4. KA9JLM

    KA9JLM Ham Member QRZ Page

    I worked at the beach using a Ham Stick mounted to a ground rod.

    Just pushed the ground rod in as far as possible in the wet sand near waters edge.

    Worked good. But salt water is not very good for the radio.
     
    K6CLS likes this.
  5. KF5FEI

    KF5FEI Ham Member QRZ Page

    Worked a guy who was vacationing down in the Carribean one year -- 817 and an antenna stuck in the sand. Absolutely no deflection on my S-meter, but he was 100% copy and sounded great.
     
  6. N1IPU

    N1IPU Premium Subscriber QRZ Page

    Used to enjoy maritime mobile on the boat. Too much upkeep though so I have the plans for a Rescue Minor a 19' powered by a three cylinder diesel. Designed for shore service it will glide into salt marshes with little issue. Can put a fold over vertical on it with no issues. Should be a blast to putter the shoreline making contacts.

    [​IMG]
     
    K0UO and AD5HR like this.
  7. AA5MT

    AA5MT Ham Member QRZ Page

    I was about a mile from the Pacific, and about 40 miles from the Atlantic. Both had excellent results and were about equal, with a slight advantage to the Pacific; probably because it was closer.

    Tom
     
  8. KL2WX

    KL2WX Premium Subscriber QRZ Page

    Radials actually in the salt water? Is that possible?
     
  9. N1IPU

    N1IPU Premium Subscriber QRZ Page

    Don't need, Just drop a copper plate. My boat had one on each side (sailboat) . The surface area is the trick and will do better than a copper rod, Just strip will do portable.
     
  10. KL2WX

    KL2WX Premium Subscriber QRZ Page

    In the water? Or just in the wet sand?
     

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