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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MR5O6XPAUZQLZ73YIXAP23WFHS2C7BPI/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "MR5O6XPAUZQLZ73YIXAP23WFHS2C7BPI", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RQX4DLDIYY3MVVVNFRFO357N5UXLTUIQ/?format=api", "sender": { "address": "wb4gcs (a) amsat.org", "mailman_id": "87014499e012476c8198fad186f7f963", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/87014499e012476c8198fad186f7f963/emails/?format=api" }, "sender_name": "Jim Sanford", "subject": "[eagle] Re: CAN-Do-Too!", "date": "2007-07-17T02:32:53Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ETSCFJMN34OWRZYJ7723CFNCCJYGC52N/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5VF64PASGSQ7S63X654POBLBOLKF64K4/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "What is the value of the inductor at hand?\nJim\n\n\nChuck Green wrote:\n\n>Hi Juan,\n>\n>I think you are referring to an e-mail I sent out. It was simply a \n>suggestion to verify the hypothesis that the power supply is in a low \n>power idle mode and hence the 5kHz you were seeing. It really doesn't \n>matter if someone is going to redesign the power supply anyway.\n>\n>I don't have any shielded inductors to send you. There may not be any \n>such thing in the same footprint as the inductor used. But even if it \n>has to be cobbled in somehow, it would be a good test to run. If anyone \n>has such an inductor, or knows the part number of such a device, it \n>might be worth getting one. But again, if someone is going to redesign \n>the power supply anyway, I would assume they will at least use a toroid, \n>and possibly a shielded one.\n>\n>Chuck\n>\n>Juan Rivera wrote:\n> \n>\n>>Chuck,\n>>\n>>I seem to recall that you wanted me to try loading down the CAN-Do \n>>switcher to see if the frequency went up. Was that you? I can’t find \n>>the email. If it was, what additional load do you want me to apply? \n>>And are you going to send me some shielded inductors to test? Let me \n>>know and I’ll jump on it for you.\n>>\n>>73,\n>>\n>>Juan\n>>\n>>------------------------------------------------------------------------\n>>\n>>*From:* [email protected] [mailto:[email protected]] *On \n>>Behalf Of *Louis McFadin\n>>*Sent:* Monday, July 16, 2007 6:10 PM\n>>*To:* Chuck Green\n>>*Cc:* Dave Black ((Work)); Dave Black ((Home)); David Smith; AMSAT \n>>Eagle; Samsonoff@Mac. Com; Juan.Rivera ((Work))\n>>*Subject:* [eagle] Re: CAN-Do-Too! ??????????\n>>\n>>Chuck,\n>>\n>>Mouser has a very large selection of D-sub connectors including the \n>>high density versions. Most are in stock.\n>>\n>>I see no inherent reason for not using them.\n>>\n>>Lou McFadin\n>>\n>>W5DID\n>>\n>>[email protected] <mailto:[email protected]>\n>>\n>>\n>>\n>>On Jul 16, 2007, at 7:19 PM, Chuck Green wrote:\n>>\n>>\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 again@#$%&^* \n>>using standard Sub-D's. That was a number of years ago so I would hope \n>>things have changed. If someone is absolutely confident they can \n>>obtain the parts we need then I'm not at all opposed to using them \n>>(remember, I'm not volunteering to do parts procurement for this \n>>project; this is a good time to use someone that's good at parts \n>>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 High \n>>Density Sub-D's being used on other satellites?\n>>\n>>Chuck\n>>\n>>Bdale Garbee wrote:\n>>\n>> \n>>\n>>>On Tue, 2007-07-10 at 09:02 -0700, Chuck Green wrote:\n>>>\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 choice, \n>>>>we'd love to hear about it.\n>>>>\n>>>> \n>>>>\n>>>At the AMSAT annual meeting that was held near Washington, D.C., a\n>>>\n>>>couple of years ago (three?), someone approached me after the CAN-Do!\n>>>\n>>>talk that Stephen and I gave to ask why we weren't using the\n>>>\n>>>higher-density connectors that put 15 pins in the same shell size as the\n>>>\n>>>9-pin version of the series we have been using... and followed up by\n>>>\n>>>sending me what looked like mil/aero-spec samples of such a part that I\n>>>\n>>>probably still have in my basement somewhere. I'm sorry that I can't\n>>>\n>>>recall at all who that person was, but it was someone who claimed to be\n>>>\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>>>\n>>>soon, so I didn't take any action on this suggestion. If we're going to\n>>>\n>>>revisit the design and think we need more than 9 pins, it might be worth\n>>>\n>>>investigating higher density connectors like that?\n>>>\n>>>Bdale\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\n\n", "attachments": [ { "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MR5O6XPAUZQLZ73YIXAP23WFHS2C7BPI/?format=api", "counter": 2, "name": "attachment.html", "content_type": "text/html", "encoding": "windows-1252", "size": 5057, "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/MR5O6XPAUZQLZ73YIXAP23WFHS2C7BPI/attachment/2/attachment.html" } ] }