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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/62RGJQOLB47G4T3U67LYBKSQ72JVVCZO/?format=api",
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    "message_id": "[email protected]",
    "message_id_hash": "62RGJQOLB47G4T3U67LYBKSQ72JVVCZO",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HGP5T6QCUVJZFAS2MKB7UR4XMT22GX7Q/?format=api",
    "sender": {
        "address": "lu6dw (a) yahoo.com",
        "mailman_id": "38581a10f76f46638a4ef3f2cf221b54",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/38581a10f76f46638a4ef3f2cf221b54/emails/?format=api"
    },
    "sender_name": "Marc Franco",
    "subject": "[eagle] Re: 2 Meter amplifier",
    "date": "2006-08-19T01:13:01Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZWTFHWT4SOEZEHCWHEK4QWZMHE6ACZVR/?format=api",
    "children": [],
    "votes": {
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        "status": "neutral"
    },
    "content": "Thanks all for the comments. I am waiting for samples\nfrom Cree. Once I get them, I will build a unit. I\njust got the Modelithics models for all the capacitors\nand inductors today. I will run another simulation\nwith those models that seem to be better than the ones\nI used.\n\nIn any case, SiC devices seem to perform just fine\ndown on 2 meters. GaN technology from Cree so far is\nonly one internally matched device good for 3 to 3.5\nGHz, and it is only 15 W. Eudyna has the devices we\nneed, but they will not give away samples under any\ncircumstance. Nitronex devices are also narrowband.\nAnd, more important, Cree is the only company so far\nthat has a bunch of talented engineers who developed\nsome reliable models. If GaN devices become available,\nwe can always try them out in a similar circuit.\n\nRegarding this statement:\n\n> >From Fig 3, I gather that the predicted 3rd\n> harmonic is more than 70 dB\n> below the fundamental.\n\nThe harmonics have been effectively attenuated by the\n5 element Chebyshev filter and the matching network.\nThe output of the amplifier without the filter has the\nharmonics at very high levels since it is a switching\namplifier.\n\nUsually, if you can simulate somthing good, you have a\ngood chance of getting it to work close enough. The\nopposite could be true, too, but it is much less\ncommon.\n\nI'll be out in the field this weekend for the 10 GHz\ncontest, and then off to the EME conference in\nGermany. Will do more work on this after that. I am\nsure there will be more question and suggestions for\nimprovement in the meantime.\n\n73, Marc N2UO\n\n\n__________________________________________________\nDo You Yahoo!?\nTired of spam?  Yahoo! Mail has the best spam protection around \nhttp://mail.yahoo.com \n",
    "attachments": []
}