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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D72YPPITO3ZT4H7HD76IHXXNDZOV2LUJ/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "017401c7c882$4d0f4ae0$6401a8c0@3GIGP4", "message_id_hash": "D72YPPITO3ZT4H7HD76IHXXNDZOV2LUJ", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RQX4DLDIYY3MVVVNFRFO357N5UXLTUIQ/?format=api", "sender": { "address": "btynan (a) beecreek.net", "mailman_id": "f74b79a39c374531bf81ab947fbc7366", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f74b79a39c374531bf81ab947fbc7366/emails/?format=api" }, "sender_name": "Bill Tynan", "subject": "[eagle] Re: CAN-Do-Too! ??????????", "date": "2007-07-17T14:53:55Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5YA6YAI2PSWNKEE6HB2G35KZADZCBGUN/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6F4JE2L2ZPS4OIVDYNO3H7OM2IARBK4M/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Are P3E and P5 also using our CAN-Do widgets? If so, we should be \ncoordinating any change is design with them.\n\nI would think that they would have the same concerns regarding RF noise as \nwe do.\n\n73,\n\nBill Tynan, W3XO\n\n----- Original Message ----- \nFrom: \"Chuck Green\" <[email protected]>\nTo: \"Louis McFadin\" <[email protected]>\nCc: \"Dave Black ((Work))\" <[email protected]>; \"Dave Black ((Home))\" \n<[email protected]>; \"David Smith\" <[email protected]>; \"AMSAT Eagle\" \n<[email protected]>; \"Samsonoff@Mac. Com\" <[email protected]>; \"Juan.Rivera \n((Work))\" <[email protected]>\nSent: Monday, July 16, 2007 9:47 PM\nSubject: [eagle] Re: CAN-Do-Too! ??????????\n\n\n> Thanks, Lou.\n>\n> I don't know of any reason not to use them either. Obviously, it needs\n> to meet our mounting configuration requirement so the new mechanical\n> design can meet the objectives I stated earlier. This means it must\n> mount on the edge of a PCB. I think the HD15-D has three rows of pins\n> so I'm not sure how this can work, but I haven't looked at the various\n> parts available so maybe this problem has been solved.\n>\n> If we are going to seriously consider using HD connectors I think we\n> need the blessing of AMSAT's VP of Engineering and the EAGLE project\n> coordinator. This would be true for any change that would be pervasive\n> in the satellite.\n>\n> I am a little disappointed that there have not been any comments\n> regarding the changes I saw as being made with a new design.\n> Additions/changes/questions/etc. I don't think we should do a new\n> design without this discussion. Maybe people feel these issues have\n> been well covered in the past. If so, a simple \"looks good to me\" would\n> be helpful.\n>\n> And no one has stepped up to say they are well qualified and will design\n> a new power supply. Without this, I don't see a new design happening,\n> but maybe.\n>\n> And finally, I see that no one has dared touch the subject of parts\n> procurement I raised.\n>\n> Obviously, most of these comments are really meant for the Cc list.\n>\n> Thanks,\n> Chuck\n>\n> Louis McFadin wrote:\n>> Chuck,\n>> Mouser has a very large selection of D-sub connectors including the\n>> high density versions. Most are in stock.\n>> I see no inherent reason for not using them.\n>>\n>> Lou McFadin\n>> W5DID\n>> [email protected] <mailto:[email protected]>\n>>\n>>\n>> On Jul 16, 2007, at 7:19 PM, Chuck Green wrote:\n>>\n>>> I have had one experience with the high density D connectors. They\n>>> were much larger pin count than 9 or 15! After someone absolutely\n>>> insisted that we use them I did the board lay out. Turned out that\n>>> they were *totally* unavailable!!! I did the board layout\n>>> again@#$%&^* using standard Sub-D's. That was a number of years ago\n>>> so I would hope things have changed. If someone is absolutely\n>>> confident they can obtain the parts we need then I'm not at all\n>>> opposed to using them (remember, I'm not volunteering to do parts\n>>> procurement for this project; this is a good time to use someone\n>>> that's good at parts procurement).\n>>>\n>>> While at Goddard for P3D vib test I noticed NASA satellites using\n>>> standard Sub-D's. That was also a few years ago. Anyone know of\n>>> High Density Sub-D's being used on other satellites?\n>>>\n>>> Chuck\n>>>\n>>> Bdale Garbee wrote:\n>>>> On Tue, 2007-07-10 at 09:02 -0700, Chuck Green wrote:\n>>>>\n>>>>\n>>>>> The sub-miniature D connector series has served us well. If anyone\n>>>>> has *experience* with something they think might be a better\n>>>>> choice, we'd love to hear about it.\n>>>>>\n>>>>\n>>>> At the AMSAT annual meeting that was held near Washington, D.C., a\n>>>> couple of years ago (three?), someone approached me after the CAN-Do!\n>>>> talk that Stephen and I gave to ask why we weren't using the\n>>>> higher-density connectors that put 15 pins in the same shell size as \n>>>> the\n>>>> 9-pin version of the series we have been using... and followed up by\n>>>> sending me what looked like mil/aero-spec samples of such a part that I\n>>>> probably still have in my basement somewhere. I'm sorry that I can't\n>>>> recall at all who that person was, but it was someone who claimed to be\n>>>> using such connectors professionally with good results.\n>>>>\n>>>> At the time, we weren't likely to be redesigning the units any time\n>>>> soon, so I didn't take any action on this suggestion. If we're going \n>>>> to\n>>>> revisit the design and think we need more than 9 pins, it might be \n>>>> worth\n>>>> investigating higher density connectors like that?\n>>>>\n>>>> Bdale\n>>>>\n>>>>\n>>>>\n>>\n> _______________________________________________\n> Via the Eagle mailing list courtesy of AMSAT-NA\n> [email protected]\n> http://amsat.org/mailman/listinfo/eagle \n\n", "attachments": [] }