<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body dir="auto"><div></div><div>Jon,</div><div>I like the choice of PVC & think it would be quite strong, & if you</div><div>potted inside, even stronger.</div><div>I am paranoid as I have destroyed a lot of electronics with salt water.</div><div>And had water sucked up inside the wire jackets for a metre due to</div><div>heating & cooling.</div><div>Maybe on the compass project strip a section of the wire going through</div><div>the epoxy & use one of the techniques in the link to improve the PVC</div><div>bond X 3 times. And go over the board with the epoxy. Was doing this </div><div>on my LED driver last night.</div><div>Alan</div><div><br></div><div><img src="cid:8B00DB32-E1C8-4501-AD57-2FF4A082620E" alt="image1.JPG" id="8B00DB32-E1C8-4501-AD57-2FF4A082620E"><br></div><div><br>On 14/06/2019, at 9:32 AM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div class="ydp4819e27cyahoo-style-wrap" style="font-family:times new roman, new york, times, serif;font-size:16px;"><div></div>
<div><span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;">Alan, all great points and I wouldn't argue against them. You may be right about the epoxy/pvc adhesion, and as usual the internet isn't much help. I can find as many "don't do it" as "it works fine" opinions out there. <span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;">I should have scuffed it up a bit though, that would have helped with adhesion. In the past I have fabricated my own "blue globe" fittings out of brass compression fittings but I wanted all plastic so I wouldn't have to worry about decay of the brass by salt-water. </span></span>I mentioned a couple of times in the video that this was a non-critical component but maybe should have impressed that a bit more on the viewer. PVC certainly would not be my choice for a critical application.</span></span></div><div><span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;"><br></span></span></div><div><span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;">Jon</span></span></div><div><span><span style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px;"><br></span></span></div><div><br></div>
</div><div id="ydp3592ad96yahoo_quoted_1175751076" class="ydp3592ad96yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
On Thursday, June 13, 2019, 08:22:08 AM EDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div dir="ltr">Jon,<br></div><div dir="ltr">that was one of the most comprehensive "How to" videos I've seen.<br></div><div dir="ltr">Have one of those compasses so will emulate that.<br></div><div dir="ltr">I have reservations about epoxy sealing the wires though.<br></div><div dir="ltr">I did a lot of experiments with glues & PVC wire jackets & found a lot of<br></div><div dir="ltr">the glues disappointing. I found one product specifically for PVC boats<br></div><div dir="ltr">that stood out.<br></div><div dir="ltr">I have mentioned before that I potted a couple of wires for 1" in to a WD40<br></div><div dir="ltr">filled housing & the WD40 just ran out between the epoxy & wire jacket<br></div><div dir="ltr">without pressure. <br></div><div dir="ltr">Under pressure I would guess that the PVC jacket would be more compressible<br></div><div dir="ltr">than the epoxy resin around it & would tear away from it, letting water in.<br></div><div dir="ltr">Suggest epoxying the whole board both sides & the wires where they are <br></div><div dir="ltr">soldered on, in case of water egress.<br></div><div dir="ltr">I have strong reservations about the epoxy sticking to the PVC pipe also.<br></div><div dir="ltr">I would be interested in others opinions on this as potting wires is <br></div><div dir="ltr">something we are doing a lot of.<br></div><div dir="ltr">Alan<br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Personal_Submersibles mailing list<br></div><div dir="ltr"><a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br></div><div dir="ltr"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div></div>
</div>
</div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>