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Re: [PSUBS-MAILIST] Proposed PSUBS standard bulkhead connector
Good work Alec.
Rather than doing this as a one time thing, I'd like to put out an RFC
and follow a process that has a bit more bite than an email agreement.
If the unit is good enough for a bulk order now, it seems like its good
enough to become a standard that we adopt for later as well.
Feel free to keep discussion going, but expect a formal RFC shortly
built around Alec's proposal.
It looks like Subconn is about 2.5 hours from me so I might be able to
visit them if necessary, or even just to build a reporte with them
(maybe even drag Lea down there with me).
Jon
Smyth, Alec wrote:
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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