<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi Hugh,</div><div id="AppleMailSignature">yes am using heat paste under the LED. Should I be using it between</div><div id="AppleMailSignature">the base & middle housing on assembly?</div><div id="AppleMailSignature">The drawing is not quite right & I am taking the fins up as far as I can.</div><div id="AppleMailSignature"> The light has kept cool when testing in the sink.</div><div id="AppleMailSignature">Good point about the o-ring height. I was hoping the top gasket might</div><div id="AppleMailSignature">seal if it was compressed to half during assembly. Maybe if I syringed</div><div id="AppleMailSignature">vasaline in to the gap above the o-ring in assembly it would help.</div><div id="AppleMailSignature">Alan <br><br>Sent from my iPad</div><div><br>On 19/04/2017, at 2:45 PM, Hugh Fulton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Alan I suggest you reduce the height of the main body and add it to the bottom piece with more grooves.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As you will no doubt be anodising you will not get as good transfer of heat through the joint.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Also if possible move the face O’ring to the outside more as water gets between the faces and corrodes.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Are you using heat transfer paste?<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hugh<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Wednesday, 19 April 2017 2:28 PM<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> [PSUBS-MAILIST] Light housing gaskets<o:p></o:p></span></p></div></div><p class="MsoNormal"><o:p> </o:p></p><div><div id="yui_3_16_0_ym19_1_1492567889675_2272"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Cliff & Alec,<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2271"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">just ordering 20 tempered borosilicate lenses at $2-50 each including postage!<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2305"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">They will go in the pressure chamber, so I'll know whether I got good value.<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2325"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Just wondering what you guys used as gaskets under the lens.<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2324"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">I did have an o-ring under the acrylic lens but are putting a gasket under the glass.<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2342"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">I have an o-ring in the bore of the lens housing but would like my gasket to be a <o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2417"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">secondary seal as well as seat.<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2416"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Alec, with your experience of lenses breaking, I am looking at a suitable thickness<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2415"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">of neoprene or similar for the top gasket that I can compress to half it's thickness <o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2434"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">when bolting the housing together. This will give me a bit of machining tolerance.<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2465"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">see attachment<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1492567889675_2448"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Alan<o:p></o:p></span></p></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>