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* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



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For further details of any free events shown here also see the "Shows and Events" section on the forum

*2021 AND SOME EVENTS ARE BEING PROPOSED. Keep them coming and let us know the details! (amstreasure@googlemail.com)

;
;:;


Model Sub Weekend, 28th, 29th August. Bluewater Parkway, Greenhithe, DA9 9

Bournville Sub Day. Sept 2021 is looking likely. More details TBA.

Barrow in Furness Regatta and Sub day. Maybe in Sept 2021. Details TBA.

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Latest topics

» GRP end caps
Pingers and Hydrophones - Page 2 EmptyTue Jul 20, 2021 9:31 am by david f

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Pingers and Hydrophones - Page 2 EmptyMon Jul 05, 2021 10:43 am by david f

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Our users have posted a total of 11427 messages in 1877 subjects

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3 posters

    Pingers and Hydrophones

    profesorul
    profesorul
    profesorul
    Guest

    Posts : 386
    Join date : 2011-07-03
    Age : 56
    Location : Bucuresti, ROMANIA
    • Post n°26

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

    Post  profesorul 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
    • Back to top
    david f
    david f
    david f
    AMS Treasurer

    Posts : 2172
    Join date : 2010-11-10
    Age : 71
    Location : Cumbria
    • Post n°27

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

    Post  david f 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
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      Current date/time is Thu Jul 29, 2021 10:04 pm