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Hi David
I know this has nothing to do with the subject,I am busy
making and fitting every kind of thru hull that I think I may use in future as
you seem to be the bof on com's have you any suggestions on what I could
make to accommodate for com's and hydrophone of which I nothing
.
Thanks
Glen SA
----- Original Message -----
Sent: Monday, January 18, 2010 9:21
PM
Subject: [PSUBS-MAILIST] RE:
Hydrophones
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
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