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Jens would be the person to ask just how to test these and other hydrophones. My method is really a go no go thing and this works better than that. > Date: Sun, 7 Mar 2010 08:33:37 -0800 > Subject: Re: [PSUBS-MAILIST] Hydrophone test > From: jimrudholm@gmail.com > To: personal_submersibles@psubs.org > > David, > I compared the units just by ear, they responded equally. Do you have > a suggestion for test measurements? My "test tank" is a steel box 38" > x38"x 30" deep. > Jim R. > > On Sat, Mar 6, 2010 at 8:57 PM, David Bartsch <dbartsch2236@hotmail.com> wrote: > > Great work! How well did it pick up? > > > > David Bartsch > > > >> Date: Sat, 6 Mar 2010 19:41:57 -0800 > >> Subject: [PSUBS-MAILIST] Hydrophone test > >> From: jimrudholm@gmail.com > >> To: personal_submersibles@psubs.org > >> > >> I have tested all the BQR-2a hydrophones in water. They were connected > >> to a Radio Shack 1 watt PA amp using the mic input. Its a Realistic 1 > >> watt speaker/amp, model 32-2040. All have the same output (by ear) > >> when thumping the steel reservoir side. > >> One hydrophone was cut removing a short strip of the rubber covering. > >> There is a potting compound which could be a silicone sealant. > >> Photo attached. > >> Jim R. > > > > ________________________________ > > Hotmail: Trusted email with powerful SPAM protection. Sign up now. > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > Hotmail: Powerful Free email with security by Microsoft. Get it now. |