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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HHTJJDCRJV5OKUIZ6FM5PZC2OFV4I4OT/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "HHTJJDCRJV5OKUIZ6FM5PZC2OFV4I4OT",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VACI4AEJUBW7YOGEFROMHNMI5AORFSND/?format=api",
    "sender": {
        "address": "zleffke (a) vt.edu",
        "mailman_id": "57a24afb1cf641f98121841e6753c12e",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/57a24afb1cf641f98121841e6753c12e/emails/?format=api"
    },
    "sender_name": "Zach Leffke",
    "subject": "Re: [amsat-bb] UHF amps",
    "date": "2018-11-26T14:16:41Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5S2P3BJDRYKIPGPH7BNCQEA447VYRXNP/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Jim,\n\nWe use Kuhne (DB6NT) products all over the place here at VT.  For the \nAmateur Satellite Service I would recommend this:\n\nhttps://shop.kuhne-electronic.com/kuhne/en/shop/power-amplifiers/MKU+PA+70CM60W+HY++UHF+MOSFETPower+Amplifier/?card=650\n\n50mW in for 60W out or there about, pretty nice and straightforward \nfinal stage.  Needs a pretty hefty heat sink, and some control circuitry \nbuilt around it.  If you are looking for something outside the Amateur \nbands, they also have a whole other commercial line of products, many of \nwhich overlap the ham bands (good for 'dual use', but may require your \nown filtering).\n\n\nGetting up to 100W or above I second the W6QPL recommendation. He also \nhas a lot of useful 'widgets' for rolling your own solutions (like a \nfine sequencer that could be used in conjunction with an SDR to control \nthe PA).\n\n\n\n-Zach, KJ4QLP\n\nResearch Associate\nAerospace Systems Lab\nTed & Karyn Hume Center for National Security & Technology\nVirginia Polytechnic Institute & State University\nWork Phone: 540-231-4174\nCell Phone: 540-808-6305\n\nOn 11/25/2018 6:29 PM, David J. Schmocker wrote:\n> Jim:\n> Check website of W6PQL.com or email Jim.. He has lots of great amplifier\n> solutions available.  73,\n> Dave KJ9I\n>\n> On 11/25/18, 5:24 PM, \"AMSAT-BB on behalf of Jim White\"\n> <[email protected] on behalf of [email protected]> wrote:\n>\n>> I'm looking for suggestions on UHF power amps.  One of my stations uses\n>> a 10mw output SDR with a 2W gain block after it on TX.  Right now I'm\n>> driving the 2W into a MIRAGE D26 to about 35W. I'd like to have about\n>> 100W.  As I look at the various amateur power amps I'm not finding\n>> anything with 2W in and 100ish out.  I could add some attenuation to the\n>> SDR/2W amp string and get the D26 output down to perhaps 20W to drive\n>> another power amp but that's not desirable because two amps in series\n>> creates a few problems.\n>>\n>> I can find Minicircuits gain blocks that would get me to perhaps 10W, in\n>> place of the 2W gain block, then drive something like a D1010 but those\n>> are a bit steep at >$1,000....\n>>\n>> So any ideas on how to get the SDR 10mw output up to about 100W would be\n>> appreciated.\n>>\n>> Jim\n>>\n>>\n>>\n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership.\n>> Opinions expressed\n>> are solely those of the author, and do not reflect the official views of\n>> AMSAT-NA.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
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