Re: [PSUBS-MAILIST] Hydrophone test

[Jim Rudholm <jimrudholm@gmail.com>]

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.
>
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