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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OKXQIVYGXWMNZDUPDRNVMZ6NPCC7M35W/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "OKXQIVYGXWMNZDUPDRNVMZ6NPCC7M35W",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OKXQIVYGXWMNZDUPDRNVMZ6NPCC7M35W/",
    "sender": {
        "address": "K3IO (a) verizon.net",
        "mailman_id": "79a9b3ddaa4b44baae47f92374974ac4",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/79a9b3ddaa4b44baae47f92374974ac4/emails/"
    },
    "sender_name": "Tom Clark",
    "subject": "[amsat-bb] Re: Amplifier Suggestions?",
    "date": "2011-09-22T05:45:22Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "James, KF6RFX asked:\n\n> We are looking for a UHF amplifier (430-440MHz) for a transceiver to go from\n> 10 mW to ~ 75W.  Most of the amps were are funding require a much stronger\n> input power than we can do. Note, it's a transceiver, so we want to be able\n> to receive through the system as well.  This is for half duplex satellite\n> communication using a USRP radio.\n>\n> Do you have any suggested amps?\n\nYou might want to check with some of the \"custom\" amateur shops like \nPure RF (http://www.purepowerrf.com/), Downeast Microwave (DEMI, \nhttp://www.downeastmicrowave.com/) or DB6NT \n(http://www.kuhne-electronic.de/en/home.html). In particular, DB6NT has \n50mw in, ~50w out amplifier \n(http://www.kuhne-electronic.de/en/products/power-amplifiers/mku-pa-4047-60-hy.html) \nthat is close to what you ask for.\n\nYou didn't mention price constraints. Any of the \"conventional\" amateur \n\"bricks\" are will probably set you back $500-$750. There are some \ncommercial alternatives you might look at. In particular check out \nMiniCircuits; at the $2000 level, the LZY1+  \n(http://www.minicircuits.com/pdfs/LZY-1+.pdf)  has 39+ db gain and will \nproduce 50 w of RF on either 2M or 70cm. Their older ZHL-50W $1400 brick \n(http://www.minicircuits.com/pdfs/ZHL-50W-52.pdf) is also a good unit. \nOn the MiniCircuits units, I'd strongly advise that you get it with \ntheir BIG heatsink/fan.\n\nYou say you need fast half-duplex. I presume that the downlink will be \non a different band (like 2M). If not, the selection of T/R transfer \nrelays will not be easy, especially if you want to avoid zapping your LNA.\n\nGood luck & 73,\nTom Clark, K3IO\n",
    "attachments": []
}