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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TKYG6WPJFJYQWJ55GNUWR4XPKE2B4UEB/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "TKYG6WPJFJYQWJ55GNUWR4XPKE2B4UEB",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/KYYG6EXV4ZEGDMGRGYOUMNSJRBNHLAS2/?format=api",
    "sender": {
        "address": "bill (a) hsmicrowave.com",
        "mailman_id": "d7ecbf0c1df148f289f27dd7a8c37974",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d7ecbf0c1df148f289f27dd7a8c37974/emails/?format=api"
    },
    "sender_name": "Bill Ress",
    "subject": "[eagle] Re: Revised Module Suggestion",
    "date": "2007-10-16T16:13:13Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/K6XFGXUIMWC64V4ZURQG25YZHYP2LD2E/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SVGXSOWEQCTWLILRSZM7MLKQQFVXEEPG/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Chuck,\n\nYah - what happened to all this talk of \"openess\" in the Eagle design \nendeavor??\n\nBill - N6GHz\n\nChuck Green wrote:\n> Hi Rick,\n>\n> That's news to me.  What is this secret group you called \"We\" and when \n> do they intend to include the rest of the Eagle community?  Also, where \n> should I ship the parts that were purchased for the IHU?  The developers \n> of this new IHU may be able to use some of them.\n>\n> Chuck\n>\n> Rick Hambly (W2GPS) wrote:\n>   \n>> Chuck,\n>>\n>> I think there is a good chance that the IHU will be redesigned for Eagle. We\n>> are discussing some important changes like switching to an open core instead\n>> of the ARM core, changing the oscillator design, and other improvements. If\n>> that is done it will be a modest leap to a new board size.\n>>\n>> Rick\n>> W2GPS\n>> AMSAT LM2232\n>>  \n>>\n>> -----Original Message-----\n>> From: [email protected] [mailto:[email protected]] On Behalf Of\n>> Chuck Green\n>> Sent: Tuesday, October 16, 2007 11:15 AM\n>> To: Dick Jansson-rr\n>> Cc: 'AMSAT Eagle'\n>> Subject: [eagle] Re: Revised Module Suggestion\n>>\n>> Hi Dick,\n>>\n>> When considering special needs, don't forget that the IHU has already \n>> been designed and will need a box to accommodate it. You did this once, \n>> but with the new box designs, it may need to be done again.\n>>\n>> Chuck\n>>\n>> Dick Jansson-rr wrote:\n>>   \n>>     \n>>> Juan:\n>>>\n>>> There is another issue that comes to mind regarding \"specialized\" \n>>> modules. In a program such as Eagle we will need to create an \n>>> acceptable module design that is useful for many applications in the \n>>> mission and then turn on the fabrication machinery for producing these \n>>> long before the electronic forces are ready to populate them for \n>>> flight. On P3D in 1992-3 we gambled and manufactured a very many \n>>> module parts, expecting that we would have some spares left over - \n>>> wrong! Even with this quite large quantity of parts (and at that time \n>>> there was criticism that we were making too many) we ran out before \n>>> flight and had to make some more.\n>>>\n>>> Fabricating module parts for this program is a guessing game, with \n>>> some estimates of needing to construct up to 80 sets of parts, and \n>>> that may not be enough. You can do the detailed program mathematics \n>>> and come up with some number and I will be willing to bet that you end \n>>> up on the wrong side of that guess. It's a dicey game.\n>>>\n>>> The lesson in this is that we must create a generic module design and \n>>> hardware that can be adapted for many different assignments in the \n>>> spacecraft. Save for your specialized need, we have no indication of \n>>> any other specialized module needs. This is why I prefer to adapt a \n>>> generic module to your needs with the added heat sinks, rather than \n>>> make just a specially machined device just for your needs. And if we \n>>> do, we will probably not have enough of them. This is why I prefer to \n>>> have a generic module design and then carefully adapt it as required \n>>> for specialized module needs. We will be flying more than just the U \n>>> receiver!.\n>>>\n>>> '73,\n>>>\n>>> Dick Jansson, KD1K\n>>>\n>>> [email protected] <mailto:[email protected]>\n>>>\n>>> [email protected] <mailto:[email protected]>\n>>>\n>>> *From:* [email protected] [mailto:[email protected]] *On Behalf Of *Juan \n>>> Rivera\n>>> *Sent:* Monday, 15 October, 2007 15.38\n>>> *To:* Dick Jansson-rr\n>>> *Cc:* Bob Davis; AMSAT Eagle\n>>> *Subject:* Re: [eagle] Revised Module Suggestion\n>>>\n>>> Dick,\n>>>\n>>> That looks nice! It appears to solve the issue of getting that front \n>>> panel at exactly 90 degrees to the baseplate and also increases the \n>>> stiffness of the baseplate. Increasing the useful front panel space \n>>> also eases the problem of working around the CAN-Do PCB with all of \n>>> the necessary I/O connectors.\n>>>\n>>> Would it be possible to customize the baseplate for the few modules \n>>> that draw high power? It would be nice to machine the baseplate and \n>>> heat sinks as one chunk of metal instead of the existing method of \n>>> having several individual heat sink pieces. I would like to see the \n>>> PCB laying flat on top of the baseplate with milled cutouts to \n>>> accommodate any devices attached to the bottom side. In a perfect \n>>> world there would be no components on the bottom and the PCB would \n>>> make contact with the baseplate across the entire surface. Another \n>>> possibility that might be worth considering would be the ability to \n>>> include \"U\" shaped heat sinks that would bridge over the top side of \n>>> hot components and attach to the baseplate through holes cut into the \n>>> PCB on either side of the component. Thermal gap filler could allow \n>>> room for CTE mismatches so that the device isn't crushed.\n>>>\n>>> 73, Juan - WA6HTP\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>> _______________________________________________\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> _______________________________________________\n> Via the Eagle mailing list courtesy of AMSAT-NA\n> [email protected]\n> http://amsat.org/mailman/listinfo/eagle\n>\n>   \n",
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