[PSUBS-MAILIST] Compass Video

[via Personal_Submersibles]

Jon can you resend the link to the compass video.  Somehow it did not come through. 

Cliff

Sent from my iPad

> On Jun 13, 2019, at 1:47 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hank,
> that's good to hear you have had success.
> If you strip a section of the wire in the epoxy and use pins as you do
> you have a better chance. This is what we have done in the past.
> In Doug's SV Seeker video on pressure testing penetrators, he has a big
> failure rate & he is using pins in the potted section.
> I am now coating my epoxy, part of my fitting & an inch up my wires
> with my PVC glue as a flexible adhesive barrier, then molding polyeurathane
> over that.
> Alan
> 
> 
> 
>  
> 
>> On 14/06/2019, at 1:27 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Alan,
>> I have had good luck with epoxy for potting penetrators in metal fittings.  I have pressure tested well past 1,000 psi with good success.  Gamma and E3000 both have 20 pin penetrators using casting resin and were pressure tested above 1,000 psi.  
>> Having said that, I potted my new compass sensor with epoxy and the sensor has failed possibly.   I have not investigated completely yet.  
>> I would have concerns now about potting electronics in epoxy.  this is my first time potting electronics,   I would recommend buying electronic specific potting material and keep using casting resin or epoxy for power penetrators.
>> Hank
>> 
>> On Thursday, June 13, 2019, 6:20:21 AM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Jon,
>> that was one of the most comprehensive "How to" videos I've seen.
>> Have one of those compasses so will emulate that.
>> I have reservations about epoxy sealing the wires though.
>> I did a lot of experiments with glues & PVC wire jackets & found a lot of
>> the glues disappointing. I found one product specifically for PVC boats
>> that stood out.
>> I have mentioned before that I potted a couple of wires for 1" in to a WD40
>> filled housing & the WD40 just ran out between the epoxy & wire jacket
>> without pressure. 
>> Under pressure I would guess that the PVC jacket would be more compressible
>> than the  epoxy resin around it & would tear away from it, letting water in.
>> Suggest epoxying the whole board both sides & the wires where they are 
>> soldered on, in case of water egress.
>> I have strong reservations about the epoxy sticking to the PVC pipe also.
>> I would be interested in others opinions on this as potting wires is 
>> something we are doing a lot of.
>> Alan
>> 
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20190613/3bca840f/attachment.html>