<div dir="ltr"><div dir="ltr">Jon,</div><div>That set-up looks ideal. Do you have a grocery-list of tasks that still need to be completed? I've been amassing a collection of oxygen analyzers and so far haven't found a unit that has been completely to my satisfaction.</div><div><br></div><div>Also, there appears to be a COVID related shortage of oxygen sensors happening right now.</div><div dir="ltr"><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div>Thanks,</div><div><br></div><div dir="ltr">-River J. Dolfi<div><br><div>412-997-2526</div><div><a href="mailto:rdolfi7@gmail.com" target="_blank">rdolfi7@gmail.com</a></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 27, 2020 at 1:11 PM via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send Personal_Submersibles mailing list submissions to<br>
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Today's Topics:<br>
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1. Re: OTS comms headset. (Alan via Personal_Submersibles)<br>
2. SEMjr - DIY Electronic Project<br>
(Jon Wallace via Personal_Submersibles)<br>
3. Re: SEMjr - DIY Electronic Project<br>
(David Colombo via Personal_Submersibles)<br>
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Message: 1<br>
Date: Sat, 21 Nov 2020 23:02:49 +1300<br>
From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
To: Personal Submersibles General Discussion<br>
<<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
Subject: Re: [PSUBS-MAILIST] OTS comms headset.<br>
Message-ID: <<a href="mailto:8ED01650-1290-4878-85B5-F2AB7719ADC6@yahoo.com" target="_blank">8ED01650-1290-4878-85B5-F2AB7719ADC6@yahoo.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
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Jon,<br>
Just clarifying my thinking....<br>
The more potting compound you put around the transducer the more it's going<br>
to impede the signal, so the logical approach would be to put less around the<br>
Topside transducer that is not going deep & more around the diver unit.<br>
Alan<br>
<br>
> On 21/11/2020, at 10:23 PM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br>
> <br>
> 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!<br>
failure depth is "deep". Certainly, I think there's no issue with it installed on any K-boat.<br>
> <br>
> <a href="https://www.oceantechnologysystems.com/wp-content/uploads/2019/08/OTS-Catalog52019-small.pdf" rel="noreferrer" target="_blank">https://www.oceantechnologysystems.com/wp-content/uploads/2019/08/OTS-Catalog52019-small.pdf</a><br>
> <br>
> Jon<br>
> <br>
> <br>
> On Friday, November 20, 2020, 11:17:35 PM EST, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br>
> <br>
> <br>
> Thanks Jon, <br>
> 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. <br>
> Alan<br>
> <br>
> On Saturday, November 21, 2020, 03:37:51 PM GMT+13, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br>
> <br>
> <br>
> 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.<br>
> <br>
> 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.<br>
> <br>
> Jon<br>
> <br>
> <br>
> On Friday, November 20, 2020, 01:07:14 PM EST, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br>
> <br>
> <br>
> Some great thoughts here. <br>
> Jon, are you going to incorporate topside <br>
> Communication through the headset in your design? Looking forward to seeing what you come up with! <br>
> I like the idea of the push button on the controls. <br>
> Alan<br>
> <br>
> <br>
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Message: 2<br>
Date: Fri, 27 Nov 2020 17:49:56 +0000 (UTC)<br>
From: Jon Wallace via Personal_Submersibles<br>
<<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
To: Personal Submersibles General Discussion<br>
<<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project<br>
Message-ID: <<a href="mailto:1234133898.2132017.1606499396296@mail.yahoo.com" target="_blank">1234133898.2132017.1606499396296@mail.yahoo.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
I have created a new page at?<a href="http://www.psubs.org/community/projects/SEM1/??describing" rel="noreferrer" target="_blank">http://www.psubs.org/community/projects/SEM1/??describing</a> a DIY project called SEMJR for building an electronic Submarine Environment Monitor which includes O2, CO2, Barometer, Temperature, and Humidity which should be valuable for anyone looking to supplement or upgrade from analog to digital devices.<br>
A Bill Of Materials for all elements of the project is also available on the web site.? Additionally, written instructions will be provided and an instructional video produced in the near future.<br>
I've designed this project to be as simple as I possibly can given the sensor components and intended functionality.? While it is intended to be a "connect Part-A to Part-B" type of project, it will involve lots of soldering as well as some wiring of electronic parts.? Additionally, you will need to download and install various software tools on your local computer to load the microprocessor with the actual application program that interfaces with the sensors.? I suspect some community members may be more adapt at this than others and encourage builders to find others in our community who can load the software on the microprocessor for them if you have have any technical hesitancy in this area.??<br>
If you incorporate all four sensors (you can include only the ones you need) this DIY project will cost you approximately $370 USD.? The largest part of that cost is the O2 and CO2 sensors which cost around $100 each.<br>
Please read the project description file on the website for more detailed information.? I expect to release the SEMJR application software before the end of December 2020.? It is developed using the Arduino IDE and will be released under GNU GPL 3.0 licensing.<br>
Jon<br>
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Message: 3<br>
Date: Fri, 27 Nov 2020 10:10:05 -0800<br>
From: David Colombo via Personal_Submersibles<br>
<<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
To: Personal Submersibles General Discussion<br>
<<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>
Subject: Re: [PSUBS-MAILIST] SEMjr - DIY Electronic Project<br>
Message-ID:<br>
<CAHHFyEE1vYrnm8QOtZ16=<a href="mailto:j_PHnLBn1SgV%2BJiQLi80m3rxdLvcw@mail.gmail.com" target="_blank">j_PHnLBn1SgV+JiQLi80m3rxdLvcw@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
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Jon, great job! This will be a great resource. This will be my next project<br>
for my VAST sub over the winter.<br>
David<br>
<br>
On Fri, Nov 27, 2020, 9:51 AM Jon Wallace via Personal_Submersibles <<br>
<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br>
<br>
> I have created a new page at <a href="http://www.psubs.org/community/projects/SEM1/" rel="noreferrer" target="_blank">http://www.psubs.org/community/projects/SEM1/</a> describing<br>
> a DIY project called SEMJR for building an electronic Submarine Environment<br>
> Monitor which includes O2, CO2, Barometer, Temperature, and Humidity which<br>
> should be valuable for anyone looking to supplement or upgrade from analog<br>
> to digital devices.<br>
><br>
> A Bill Of Materials for all elements of the project is also available on<br>
> the web site. Additionally, written instructions will be provided and an<br>
> instructional video produced in the near future.<br>
><br>
> I've designed this project to be as simple as I possibly can given the<br>
> sensor components and intended functionality. While it is intended to be a<br>
> "connect Part-A to Part-B" type of project, it will involve lots of<br>
> soldering as well as some wiring of electronic parts. Additionally, you<br>
> will need to download and install various software tools on your local<br>
> computer to load the microprocessor with the actual application program<br>
> that interfaces with the sensors. I suspect some community members may be<br>
> more adapt at this than others and encourage builders to find others in our<br>
> community who can load the software on the microprocessor for them if you<br>
> have have any technical hesitancy in this area.<br>
><br>
> If you incorporate all four sensors (you can include only the ones you<br>
> need) this DIY project will cost you approximately $370 USD. The largest<br>
> part of that cost is the O2 and CO2 sensors which cost around $100 each.<br>
><br>
> Please read the project description file on the website for more detailed<br>
> information. I expect to release the SEMJR application software before the<br>
> end of December 2020. It is developed using the Arduino IDE and will be<br>
> released under GNU GPL 3.0 licensing.<br>
><br>
> Jon<br>
> _______________________________________________<br>
> Personal_Submersibles mailing list<br>
> <a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br>
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</blockquote></div></div>