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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/I3KWYBDPAC7RBR53B2FG2Q4LZYZQDJSM/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "I3KWYBDPAC7RBR53B2FG2Q4LZYZQDJSM", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/MGJEIDDMBS4OJJZV3E75HMEKBRNURNG5/?format=api", "sender": { "address": "faunt (a) panix.com", "mailman_id": "fea5a111bdd14188b4f0e2ebfecfadc9", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/fea5a111bdd14188b4f0e2ebfecfadc9/emails/?format=api" }, "sender_name": "Doug Faunt N6TQS +1-510-655-8604", "subject": "[amsat-bb] Re: Radios for satellite operations", "date": "2010-04-17T17:23:37Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7ZRYW5G4BJOPTM3PPILZELYCOUOZXXKW/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Re: K3 full-duplex- I asked Wayne about this today, at Visalia.\n\nIt's theoretically possible in the hardware, but there's a LOT of\nsoftware/firmware necessary, and no one is working on that.\n\nIt MAY happen, but NOT soon.\n\n73, doug\n\n From: James Duffey <[email protected]>\n Date: Sat, 17 Apr 2010 08:13:22 -0600\n\n Can the K3 do full duplex in the same band? Elecraft's FAQ seems to indicate that they do not support this mode:\n\n\t \"Can the subreceiver provide unbroken audio using any antenna input while the K3 is transmitting?'\n\n\t \"This is \"full duplex\" operation, which is very difficult to do inside a single cabinet. However, it may be possible if \tyou're using the transverter I/O (0 dBm TX power). We'll be testing this case and will post full specs later.\" \n\n Does the firmware support this?\n\n I am very interested in your experiments. Will you need to modify the DEMI transverter IFs? - Duffey\n\n\n On Apr 17, 2010, at 12:44 AM, Edward Cole wrote:\n\n > Of course, each to his own choice.\n > \n > I decided on the K3/10 (10w version of the K3), with subreceiver and \n > transverter interface (and a few other goodies) ...total $3000\n > Add a new DEMI 144/28 xvtr $500, and later a DEMI 432/28 xvtr kit \n > $400. These are the new design to be released in early June.\n > I added a ARR 50-Mhz preamp and building a 300w HF amp kit (cost $150).\n > \n > When I have fully investigated running the K3 for full duplex under \n > sw control I will consider letting my FT-847 go. Keeping it for now \n > (also because I will not get the 432 xvtr right away).\n > \n > Why not the Flex-500 + U/V? Well, cost is one, and the need to have \n > a computer was another. I will use my 6-lb. K3 for portable mw \n > operation (mainly CW) so its size, weight and ability to be fully \n > used without toting along a computer.\n > \n > Undoubtedly the K3 and Flex-5000 are the top radios in the amateur \n > market as far as performance specs. I've had my K3 for about a month \n > and am still learning more about it. Its a keeper. (better be as I \n > will never spend this much on ham radio, again)\n > \n > 73, Ed - KL7UW\n", "attachments": [] }