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Jim, Lets ask Jens Laland! He seems to know this kind of stuff. I had a BQS-04 on my boat. Something to make note of... BQS-* usually indicates "send".. that's what the "s" designates. BQR-* usually designates "receive of listen" that's what the "r" designates. The BQR-2 system was the system prior to the BQR-21 which my sub was equipped with and may be a stave (a stack of one or more passive hydrophones arranged in a single row.) In other words it may not be designed for active transmissions at all. You have a gem there so be sure what it was designed for before damaging it. Jens, help us out here... David Bartsch > Date: Mon, 18 Jan 2010 07:19:42 -0800 > Subject: Hydrophones > From: jimrudholm@gmail.com > To: dbartsch2236@hotmail.com > > Hello, > I have enjoyed your posts on the Psubs site and Doug and Kay's site. > > I have several hydrophones that were identified from BQR-2a sonars but > cannot verify that. They are 45.5" long, the rubber body 1.875" in > diameter, and 14.5 pounds. They are supposed to have a stack of barium > titanate cylinders about 1.5" long and about 1/8" wall thickness for > the active elements. I bought some of these cylinders years ago from a > surplus electronics store. The hydrophones were purchased probably > back in the 60s from DOD surplus at Rough and Ready Island near > Stockton, CA. > > Attached is a pic. > > I would like to test them before offering them to the Psub community. > I have a HP 204C oscillator and 403B voltmeter. Any suggestions for a > test schematic? > > Thanks, > > Jim Rudholm Hotmail: Free, trusted and rich email service. Get it now. |