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Hi Glen,
I'm in Auckland about 200km South of the Bay of
Islands.
I normally go half way up & out from Whangarei for
serious fishing.
I know lots of South Africans over here, theres been a
flood
of imigrants in the last 10 years.
I'm working on my sub, but still lots to do. I'm using a blown dome wich
is in process of being made; when
I get it & measure it I'll know what depth
I can go to & make my fiberglass hull to
match.
I'm going as small as I reasonably can & have
bought most of my components
so I know exactly what space I need. The object is to make
it easy to transport
& launch also maybe look in a few caves.
Regards Alan
----- Original Message -----
Sent: Wednesday, January 20, 2010 11:35
AM
Subject: Re: [PSUBS-MAILIST] RE:
Hydrophones
Hi Alan
Its what I have experienced our stuff goes to Europe
first are you close to Russell I spent some time there great
fishing.
I visited N.Z twice my wife and I were getting ready to
immigrate and last minute business opportunity came up put a stick in the
spokes.Have you started building your sub?
All the Best
GlenSA
----- Original Message -----
Sent: Wednesday, January 20, 2010 12:09
AM
Subject: Re: [PSUBS-MAILIST] RE:
Hydrophones
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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