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Thanks David
The problem with the standard thru hull you are suggesting
would take in excess of a month to reach me in this part of the world ,is it
a skin fitting type or does it also need to be welded in?does one attach it
to the C.T or some where else .
Glen SA
----- Original Message -----
Sent: Tuesday, January 19, 2010 11:29
PM
Subject: RE: [PSUBS-MAILIST] RE:
Hydrophones
Glen,
We just voted on a standard thru hull
fitting that will accommodate the various underwater comms to include UQC. I
would suggest you use this fitting as future use of it is all but
ensured. I believe a club discount may exist for this device.
The broadband system I am providing uses 4 wires at present with future
construction making use of but only two.
Someone steer Glen to the
thru hull information as to ordering and specifics
please.
David Bartsch
From: glenbrown@vodamail.co.za
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] RE:
Hydrophones
Date: Tue, 19 Jan 2010 18:16:35 +0200
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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