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*STOP PRESS* Coronavirus. A lot of Clubs have already cancelled all activities. Check carefully before you plan any travel

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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Bournville Sub Day, Sunday 13th September

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Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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    Pingers and Hydrophones

    profesorul
    profesorul
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    Posts : 384
    Join date : 2011-07-03
    Age : 55
    Location : Bucuresti, ROMANIA

    Pingers and Hydrophones  - Page 2 Empty Re: Pingers and Hydrophones

    Post  profesorul on Sun Mar 22, 2015 8:46 pm

    I'm interested too .
    I think I steel have some were a Walkman tape cassette with his original helmet ! .

    Yap , I know I'm a sentimental guy !.

    MARIUS
    david f
    david f
    AMS Treasurer

    Posts : 2086
    Join date : 2010-11-10
    Age : 69
    Location : Cumbria

    Pingers and Hydrophones  - Page 2 Empty Re: Pingers and Hydrophones

    Post  david f on Mon Mar 23, 2015 2:36 pm

    Just try it. You are not going to do any damage!

    The more hydrophones floating about the better (See my other post today!)

    Piezo elements are fairly "high impedance" but a lot of reasonably sensitive audio amplifiers will do the trick.

    The sort of sensitivity you are looking for (with the hydrophone element on a table) lightly tapping or scraping the table should give a noise over the headphones. (Headphones are always better, for some reason.)

    David

      Current date/time is Fri Apr 10, 2020 12:42 am