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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/I3QP7JHCRYCSXQFPO3FG3NMKCBK7OM4R/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "CAN6TEUe4HhuUkDrb5uSCZ7BcVjqUqEuPUYUyGM=PRONkTJdzJA@mail.gmail.com", "message_id_hash": "I3QP7JHCRYCSXQFPO3FG3NMKCBK7OM4R", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/WN5HYRW6SUV5O26DNFCPXF464CNVR7TM/?format=api", "sender": { "address": "amsat-bb (a) wd9ewk.net", "mailman_id": "21664df01bef4757931b7cdb42a9e768", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/21664df01bef4757931b7cdb42a9e768/emails/?format=api" }, "sender_name": "Patrick STODDARD (WD9EWK/VA7EWK)", "subject": "Re: [amsat-bb] Wouxun KG-UV8D", "date": "2014-07-31T21:04:07Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WN5HYRW6SUV5O26DNFCPXF464CNVR7TM/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi Craig!\n\nAs N8HM mentioned, I have tried the KG-UV8D on SO-50. It will not work\nfor cross-band, full-duplex operation on this satellite. Using a group\nof memory channels, its receiver is OK for hearing the downlink when\nworking SO-50 half-duplex, or as a receiver when transmitting with a\nsecond HT (even one of the cheaper Baofeng HTs!). There has been a long\ndiscussion thread about this radio on QRZ.com's satellite forum at:\n\nhttp://forums.qrz.com/showthread.php?437813-Wouxun-KG-UV8D-for-SO-50-Sure-but-not-full-duplex-by-itself\n\nLike with many Kenwood and Yaesu HTs, you can program a group of memory\nchannels to work SO-50 half-duplex. Make sure to set up the memories\nwhere the receive/output frequency steps down in 2.5 kHz steps. Otherwise,\nthere are times, around the point you would change receive frequencies,\nwhere you won't be able to hear the satellite on either frequency when\ntuning in 5 kHz steps (i.e., from 436.800 to 436.795 MHz). All versions\nof this radio with firmware at V1.02 or greater tune in 2.5 kHz steps,\nso this means you'll end up with twice as many memories for working\nSO-50 than with other radios incapable of tuning in steps smaller than\n5 kHz. (To view the firmware version in a KG-UV8D, press and hold the\n3 key while turning on the radio)\n\nBeyond SO-50, the KG-UV8D will work OK for V/U cross-band full-duplex\noperation, if the 70cm signal you're trying to hear is a lot stronger\nthan the SO-50 downlink. The receiver is certainly better than the\nAlinco DJ-G7T 2m/70cm/23cm HT - another one that was promoted for\ncross-band, full-duplex operation a few years ago. I find myself\ngrabbing the KG-UV8D more often when I want to have an HT with me,\nunless I'm looking to do APRS using a TH-D72A instead.\n\nWhile at the ARRL Centennial Convention in Hartford a couple of weeks\nago, I did a test with my KG-UV8D and the Fox-1 prototype on display\nat the AMSAT booth. The Fox-1 series of satellites (remember 3 have\nlaunches - go AMSAT!) are U/V satellites, the reverse of SO-50. You\nwill transmit on 70cm, and receive on 2m. In this configuration,\nand making allowances in an attempt to better simulate working a\nFox-1 satellite in orbit, I was able to work the Fox-1 protoype\nfull-duplex walking around the main hall and just outside the hall.\nI varied my transmit power between high and low, and moved my antenna\naround, trying to change how the received signals sounded as I\ntransmitted. The Fox-1 prototype used a dummy load as an antenna.\nI was able to hear myself without any noticeable desense at either\ntransmit power level, even when the Fox-1 prototype's downlink\nstarted to sound as weak as SO-50 typically does. I received good\nsignal reports from Burns W2BFJ, a member of the Fox software team\nat the AMSAT booth who listened to some of my tests. This gives me\nhope that the KG-UV8D - and other radios like the newer versions of\nthe IC-W32A - might work for cross-band, full-duplex operation with\nU/V satellites like the upcoming Fox-1 series, when they don't do\nthe same for V/U satellites like SO-50.\n\nIf you want to discuss this further, and the posts on that QRZ\nforum thread didn't answer any other questions you might have about\nthe radio, please feel free to contact me directly.\n\nGood luck, and 73!\n\n\n\n\n\nPatrick WD9EWK/VA7EWK\nhttp://www.wd9ewk.net/\n\n\n\n\nHas anyone tried one of these for portable use ? It has cross band repeater\n> and also functions in Full Duplex.\n>\n>\n", "attachments": [] }