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Hi Glen,
I get things out of the states to N.Z. in about 1 week- 10
days.
The Americans have got a good reputation in this
reguard.
Alan
----- Original Message -----
Sent: Wednesday, January 20, 2010 10:54
AM
Subject: Re: [PSUBS-MAILIST] RE:
Hydrophones
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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