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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Q7RLLFTCKPBAARU6QEMHLJ3OGMHALVE7/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "Q7RLLFTCKPBAARU6QEMHLJ3OGMHALVE7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/Q7RLLFTCKPBAARU6QEMHLJ3OGMHALVE7/?format=api",
    "sender": {
        "address": "tom.k3io (a) gmail.com",
        "mailman_id": "a3cf919d50e34818957525c30686cb1e",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/a3cf919d50e34818957525c30686cb1e/emails/?format=api"
    },
    "sender_name": "Tom Clark",
    "subject": "[amsat-bb]   Re: Antenna Analyzer",
    "date": "2011-03-07T05:59:21Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "In addition to the other alternatives described by WA4SCA, Let me also \nsuggest another nice VNA (Vector Network Analyzer) -- the Mini-VNA and \nMini-VNA PRO made in Europe and available in the US from \nhttp://www.w4rt.com/\n  and Gigaparts \n(http://www.gigaparts.com/gpsales/1002/store.php?action=profile&sku=ZW4-MINIVNA \n<http://www.gigaparts.com/gpsales/1002/store.php?action=profile&sku=ZW4-MINIVNA> \nand \nhttp://www.gigaparts.com/gpsales/1002/store.php?action=profile&sku=ZW4-MINIVNA-PRO \n<http://www.gigaparts.com/gpsales/1002/store.php?action=profile&sku=ZW4-MINIVNA-PRO>).\n\nI got my Mini-VNA PRO last year at Dayton from W4RT and I find it to be \na most interesting widget. It is a full 2-port VNA covering the entire \n0.1-200 MHz range. It is intended to be used with a Windoze computer (my \nLenovo Netbook is more than adequate) and normally connects via USB. The \nUSB port provides DC power, either to run the unit or to charge its \ninternal LiPO battery.\n\nIt is battery powered and can also interface via a wireless Bluetooth \nserial port. One nifty thing here -- you can put the entire VNA at the \nfeedpoint of an antenna (very useful with an HF wire), hoist it into the \nair and measure the intrinsic feedpoint impedance with NO cables \nattached, making all measurements using the wireless Bluetooth connection.\n\nAnother useful additional function is that the PRO has two independent \nDDS generators, one associated with each port. They can be programmed to \nuse as separate programmable test oscillators.\n\nThe Mini-VNA and PRO are of German origin and marketed by Wimo: \nhttp://www.wimo.com/cgi-bin/verteiler.pl?url=instrumentation_e.html&p=minivna-more-e#minivna \n<http://www.wimo.com/cgi-bin/verteiler.pl?url=instrumentation_e.html&p=minivna-more-e#minivna>. \nThere is a nice writeup on the original Mini-VNA in the British magazine \nPractical Wireless \n(http://www.wimo.com/download/testreport_minivna_practical_wireless-dec-07.pdf) \nthat describes use of the VNA.\n\n73, Tom K3IO\n\n",
    "attachments": []
}