David,
Although inside the cabin things are supposedly not underwater, they
are very far from dry. I only use explosion-proof switches, for
instance, because those are sealed and therefore humidity-proof. What
I'm wondering is whether there are any connectors that, without going
to the extreme of the outboard ones, one might call "splash-proof"
grade? So far I've been using Radio Shack, but would like something a
little more rugged if anyone has a suggestion. For example, perhaps
one of the trailer hitch connectors might do.
thanks,
Alec
------------------------------------------------------------------------
*From:* owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] *On Behalf Of *David
Bartsch
*Sent:* Thursday, December 17, 2009 5:38 PM
*To:* personal_submersibles@psubs.org
*Subject:* RE: [PSUBS-MAILIST] Proposed PSUBS standard bulkhead connector
Alec,
Great work as always!
As you are aware, I use only two wires for either the voice
transmitter or passive hydrophone. These two wires (for either
purpose) terminate prior to connection to the communications console
unit with a simple 1/4" jack. These are acquired two to a container at
Radio Shack. (Use the ones with plastic shrouds covers or bad things
can happen...ask Kyle!)
Exactly how to connect both separate cables at this single tie point
at the submarines inner hull I will have to leave for someone more in
the know. Perhaps just a custom soldering job could do the trick.
Should cross talk between the two functions result, I do not feel it
would be a real issue.
David Bartsch
------------------------------------------------------------------------
Subject: [PSUBS-MAILIST] Proposed PSUBS standard bulkhead connector
Date: Thu, 17 Dec 2009 17:16:43 -0500
From: Alec.Smyth@compuware.com
To: personal_submersibles@psubs.org
Hello friends,
A little time ago I volunteered to identify a bulkhead connector we
could standardize on. There would be clear practical and safety
advantages to this. For example, at the next PSUBS convention some of
us will have comms gear and if we all have a standard connector on our
boats, we can pass the comms gear around. It also should facilitate
the adoption of devices developed by David Bartsch or other PSUBS
members. I've evaluated products from Seacon, Subconn, and Impulse and
now have a specific connector to propose. Products from the three
vendors were of roughly equivalent specs, and in all cases amply
exceed the needs of your typical PSUB.
The one I'd like to propose is from Subconn, because they came through
with a 20% discount for PSUBS. Standard off-the-shelf comms such as
OTS or Divelink require only 2 conductors for their transducers. I am
proposing we adopt a 4 contact connector so we could also plug in
David Bartsch's combined comms and hydrophone. Or one could combine a
comms transducer with a depth sounder (2 conductors each). These
penetrators are rated for 10 amps per conductor, 600V, and 20,000 psi.
They are "wet mateable", so gear can be switched between boats without
needing to pull the boats from the water. Here is the spec sheet:
_http://www.subconn.com/filer/1031/Standard_Circular_4_Contacts.1673263891164403.pdf_
Specifically, the part numbers I am suggesting are:
BH4F, which screws into the hull and has 4 female contacts outside,
ordinary leads on the inside. ($76.90)
IL4M, which is the outboard cable and male plug. ($42.30)
DLSA-F and DLSA-M, a plastic locking sleeve that connects the two
parts together. This is optional and only really necessary if there is
movement in the cable. ($6.30)
DC4M, a blank plug that protects the penetrator if you dive without
anything connected to it. Also optional. ($18.30)
The above are list prices. If we order a quantity of 1-10, we get 20%
off. If we order more than 10, it'll be 25% off.
Please tell me whether you agree with this selection, and if so
whether you are on board for placing an order. Let me know the number
of connector sets you would purchase (in my case it's 2). Adding up
the responses we'll know our discount, and I propose each of us then
place his order separately since shipping has to be individual in any
case.
Dan Lance has volunteered the use of his OTS comms gear for the next
convention, and has already sent me its cables. I will go ahead and
connect his outboard (transducer) cable to an IL4M. For the inboard
cable, I have to identify something inexpensive thats widely available
(think Radio Shack) to connect the penetrator leads with his cable.
Any suggestions for the inboard connector?
Thanks,
Alec
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