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<div dir="ltr" data-setdir="false">I'm a bit confused by the nomenclature as well. It looks like you are using some hard plastic ends (delrin type material?), after all, you are machining it, tapping it, putting screws in one end and pipe plug in the other. So those must be a rigid inflexible material. The acrylic tube is also effectively rigid underwater when filled with oil and sealed. The rubber coupling is providing the seal between the acrylic and the machined hard rigid plastic ends but I'm not seeing where it allows any squeezing in the sense of pressure compensation. If the rigid plastic end caps are butt against the circumferential edge of the oil filled acrylic tube, there's nothing to compress because it's a virtual solid.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I'm pretty sure you are using the type of rubber coupling as shown in this link <a href="https://www.fernco.com/plumbing/shielded-couplings/no-hub-couplings" rel="nofollow" target="_blank">https://www.fernco.com/plumbing/shielded-couplings/no-hub-couplings</a> </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jon</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Tuesday, March 10, 2020, 04:39:40 PM EDT, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div dir="ltr">Brian, the end caps are soft rubber with a metal corrugated sleeve. The idea is to keep the inside of the light the same pressure as the outside when at depth. The water pressure squeezes the rubber witch in turn squeezes the oil inside the light. I actually made a test chamber video of the light yesterday. it will be posted soon, so then it should make sense.</div><div dir="ltr">Hank</div><div><br clear="none"></div>
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On Tuesday, March 10, 2020, 12:09:30 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpd9f743ebyiv4713145292"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2" style="font-family:Arial, sans-serif;">Hank,</font><div><font size="2"><font face="Arial, sans-serif"> You referred to your end caps on your light as "bellows" , do they flex some how? seems like if it is totally oil filled there would be no real movement going on.</font></font></div><div><font size="2"><font face="Arial, sans-serif"><br clear="none"></font></font></div><div><font size="2"><font face="Arial, sans-serif">Brian</font></font></div><div><font size="2"><font face="Arial, sans-serif"><br clear="none"></font></font></div><div><font size="2"><font face="Arial, sans-serif"><br clear="none"></font></font><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">--- personal_submersibles@psubs.org wrote:</span><br clear="none"><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org></span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">To: Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org></span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Subject: Re: [PSUBS-MAILIST] (no subject)</span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Date: Mon, 9 Mar 2020 22:01:47 +0000 (UTC)</span><br clear="none"><br clear="none"><div><div></div>
<div dir="ltr">Cliff, </div><div dir="ltr">Thanks' yes I have a sounder on E3000 that is rated for 1,000 feet. I modified it as per Alan's idea sort of. I epoxied the transducer to a heavy piece of fibreglass to add strength to the bottom of the transducer. I took a transducer apart to see what makes them tick, there is a disk inside potted in hard rubber. The bottom of the disk vibrates so the rubber is very thin under the disk. The idea of the fibreglass sheet is to create a hard layer between the disk and the water. Stay tuned on this idea.</div><div dir="ltr">Hank</div><div><br clear="none"></div>
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On Monday, March 9, 2020, 2:31:52 PM MDT, Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div dir="ltr">Nice job on LED light bar YouTube video.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">OAS</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Are you going to install a sounder for the E3000? If yes,have you speced it? If yes can you send spec? </div><div dir="ltr"><br clear="none"></div><div dir="ltr">Best </div><div dir="ltr"><br clear="none"></div><div dir="ltr">Cliff</div><div><br clear="none"></div>
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On Sunday, March 8, 2020, 10:21:02 AM CDT, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div><div>Jon. Thank you, I don’t post where I source parts because I want people to engage by asking questions on YouTube. Apparently that helps my channel. If my channel goes anywhere I will start doing as you suggest. <div>Hank<br clear="none"><br clear="none"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><div><br clear="none"><blockquote>On Mar 7, 2020, at 8:37 PM, Jon Wallace via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"><br clear="none"></blockquote></div></div><div><blockquote><div dir="ltr"><div style="font-family:times new roman, new york, times, serif;font-size:16px;"><div></div>
<div dir="ltr">Great how-to video Hank. Talking about how to build one is one-thing, but seeing a demo is so much better. Can I make a suggestion, adding a parts list in the description area of your video. I know you buy the light bar from Amazon but there are a zillion of them there, which one? What size acrylic tube, where did you source it?</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Jon</div><div dir="ltr"><br clear="none"></div><div><br clear="none"></div>
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On Saturday, March 7, 2020, 11:32:47 AM EST, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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