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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MOEHXKOCGQMD3YF74KYVIJOSFKTKVX2W/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "01c201c7c885$f9e41b30$6401a8c0@3GIGP4", "message_id_hash": "MOEHXKOCGQMD3YF74KYVIJOSFKTKVX2W", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RQX4DLDIYY3MVVVNFRFO357N5UXLTUIQ/?format=api", "sender": { "address": "btynan (a) beecreek.net", "mailman_id": "f74b79a39c374531bf81ab947fbc7366", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f74b79a39c374531bf81ab947fbc7366/emails/?format=api" }, "sender_name": "Bill Tynan", "subject": "[eagle] Re: CAN-Do-Too! ??????????", "date": "2007-07-17T15:20:14Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6F4JE2L2ZPS4OIVDYNO3H7OM2IARBK4M/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Chuck:\n\nI thought I remembered that they are using them as well, but I was out of \nthe Eagle loop for a number of months. Just got back in in time to see all \nthe EMI problems being unearthed.\n\nYes, ITAR is %$&@ nuisance. I tried to do something about it 6 years ago, \nbut Sept. 20, 2001 (9 days after 9/11) was the wrong time to begin.\n\nOur DL friends are certainly aware of the EMI situation our folks have \nuncovered.\n\n73, Bill\n\n\n----- Original Message ----- \nFrom: \"Chuck Green\" <[email protected]>\nTo: \"Bill Tynan\" <[email protected]>\nCc: \"Louis McFadin\" <[email protected]>; \"Dave Black ((Work))\" \n<[email protected]>; \"Dave Black ((Home))\" <[email protected]>; \n\"David Smith\" <[email protected]>; \"AMSAT Eagle\" <[email protected]>; \n\"Samsonoff@Mac. Com\" <[email protected]>; \"Juan.Rivera ((Work))\" \n<[email protected]>\nSent: Tuesday, July 17, 2007 10:05 AM\nSubject: Re: [eagle] Re: CAN-Do-Too! ??????????\n\n\n> Hi Bill,\n>\n> Yes, they are using the same device. Both engineering and flight units \n> have been delivered to them. I have heard nothing regarding their use. \n> If they have had any issues with them, they have resolved them themselves.\n>\n> My communications with them have been severely limited due to ITAR issues. \n> I really despise this situation and am looking forward to the day that I \n> can resume my normal very good working relations with them. It is \n> unfortunate that our government is such an inhibitor of technical \n> development and destroyer of international relations. Oops, I probably \n> shouldn't have said that. It's all your fault for getting me started :)\n>\n> Chuck\n>\n>\n>\n> Bill Tynan wrote:\n>> Are P3E and P5 also using our CAN-Do widgets? If so, we should be \n>> coordinating any change is design with them.\n>>\n>> I would think that they would have the same concerns regarding RF noise \n>> as we do.\n>>\n>> 73,\n>>\n>> Bill Tynan, W3XO\n>>\n>> ----- Original Message ----- From: \"Chuck Green\" <[email protected]>\n>> To: \"Louis McFadin\" <[email protected]>\n>> Cc: \"Dave Black ((Work))\" <[email protected]>; \"Dave Black \n>> ((Home))\" <[email protected]>; \"David Smith\" <[email protected]>; \"AMSAT \n>> Eagle\" <[email protected]>; \"Samsonoff@Mac. Com\" <[email protected]>; \n>> \"Juan.Rivera ((Work))\" <[email protected]>\n>> Sent: Monday, July 16, 2007 9:47 PM\n>> Subject: [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 \n>>>>>> 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 \n>>>>>> 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>> \n\n", "attachments": [] }