[PSUBS-MAILIST] OTS comms headset.

[Alan via Personal_Submersibles]

Jon,
the SSB 2010 is rated for 500ft. The newer models we were looking at on Psubs FB
were rated to 300ft. I would guess they factor in a safety margin. 
As you say, they don't have a max depth for the top side transducer, they just
quote the length of the cable.
I'm just concerned that the transducer designed for top side use mightn't be as
depth capable as the smaller transducer designed for diver use.
This would be a good question for OTS technical dept. if they answered questions!
Alan 




> On 21/11/2020, at 10:23 PM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan, if you are asking for an OTS rating, it's rated for the depth of it's intended purpose.  See link to document, below.  For the STX-101, that's 35 feet because the standard cable length is 35 feet long.  For the SSB-2010 it's 300 feet because that's about the limit for deep technical diving.  You can see from the chart that the transducer with 55 foot cable is rated for 55 feet, and the one with 100 foot cable is rated for 100 feet.  These ratings make sense from a marketing perspective but I have no concern that these are even close to actual failure depths.  For example, Cliff gave the R-300 a 400 foot unmanned depth test in Lake Tahoe with his OTS transducer attached.  Surface unit performance is going to be negatively affected by signal loss and potential electromagnetic reflections in the cable just like any transceiver/antenna system which is why you won't see a 1000 or 2000 foot cable option.  The transducer units appear to be solidly potted and I suspect their failure depth is "deep".  Certainly, I think there's no issue with it installed on any K-boat.
> 
> https://www.oceantechnologysystems.com/wp-content/uploads/2019/08/OTS-Catalog52019-small.pdf
> 
> Jon
> 
> 
> On Friday, November 20, 2020, 11:17:35 PM EST, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Thanks Jon, 
> do you know the depth rating for the XTS-101transducer. If its designed as a top side module I am wondering whether the transducer is not as robust as the divers transducer. I have seen that you can purchase a 100ft extension cable for it, so it can at least go that depth. 
> Alan
> 
> On Saturday, November 21, 2020, 03:37:51 PM GMT+13, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Alan, don't know, but I will certainly look into it.  Sounds like it could be as simple as a junction box that accepts VHF and UWC inputs, and a toggle switch to select the appropriate radio.  Nyutco modified his headset to use two boom mics, one for VHF the other for UWC.  I don't remember how we switched between the two transceivers though.  Maybe someone else does.
> 
> The STX-101 will be easy to modify for off-the-shelf headsets.  It uses a separate banana-clip jack for headset and microphone so there should be no cutting of wires necessary.  The SSB-2010 is going to be more of a hassle because it will require cutting and splicing their stock wire adapter.
> 
> Jon
> 
> 
> On Friday, November 20, 2020, 01:07:14 PM EST, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Some great thoughts here. 
> Jon, are you going to incorporate topside 
> Communication through the headset in your design? Looking forward to seeing what you come up with! 
> I like the idea of the push button on the controls. 
> Alan
> 
> 
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