Email Detail
Show an email
GET /hyperkitty/api/list/[email protected]/email/6L4ZDT2DDDLSVGRAXC3OJNVDASKTPODG/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6L4ZDT2DDDLSVGRAXC3OJNVDASKTPODG/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "1277757034.8032541271785087508.JavaMail.root@sz0126a.emeryville.ca.mail.comcast.net", "message_id_hash": "6L4ZDT2DDDLSVGRAXC3OJNVDASKTPODG", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6L4ZDT2DDDLSVGRAXC3OJNVDASKTPODG/?format=api", "sender": { "address": "w7lrd (a) comcast.net", "mailman_id": "717aa2a241704c7497e9abd8c983f6b7", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/717aa2a241704c7497e9abd8c983f6b7/emails/?format=api" }, "sender_name": "Bob- W7LRD", "subject": "[amsat-bb] Re: AO-51 V/S", "date": "2010-04-20T17:38:07Z", "parent": null, "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IWYL4IOBCGGGJBIPMYVTVATJ6NJC6YCZ/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "\n\nHi Luc and all \n\nI am using a Transystem 3731AA downconverter. Also an old Kenwood TS-700A for the tunable IF. I have compared Keps 13LNC-PH downconverter against the 3731. The 3731 is virtually immune to desense to 2M tx as well as wifi etc. However the Keps (pricey) is affected by the 2M tx. Without the noise blanker turned on in the TS-700 I get lots of snapping, popping from wireless phones, wifi etc. The noise blanker in this old 700 is superb, better that the one in my 910! Go figure! Mind you this is all empirical evaluation using nothing but my ears. I have heard the filter in the 3731 is better than most. I will be shipping some of my dc's soon to a fellow who can give a very accurate evaluation on these devices. Hope this helps Luc, see you on S band! \n\n73 Bob W7LRD \n\n\n\n\n----- Original Message ----- \nFrom: \"Luc Leblanc\" <[email protected]> \nTo: [email protected] \nCc: [email protected] \nSent: Tuesday, April 20, 2010 6:14:17 AM GMT -08:00 US/Canada Pacific \nSubject: [amsat-bb] Re: AO-51 V/S \n\nOn 20 Apr 2010 at 2:24, Bob- W7LRD wrote: \n\nDate sent: Tue, 20 Apr 2010 02:24:55 +0000 (UTC) \nFrom: Bob- W7LRD <[email protected]> \nSubject: [amsat-bb] AO-51 V/S \nTo: [email protected] \n\n> \n> \n> This last pass worked W6YX and heard Kerry, WC7V. Noticed some very deep fades. \n> \n> 73 Bob W7LRD \n\nDid anyone ever tested their downconverter who is basically a receiver to measure the amouint of desense the WI-FI , spread spectrum and \nfrequency hopper device and so on produce on 2.4Ghz? \n\nDesense is very noticeable on VHF and UHF when a transmitter is transmitting near a receiver as per i can see on a PCR-1000 scope screen \nthere is always a 10db noise floor but i'm not sure if this level is not really much higher as the scope seems to not be fast enough to \ndisplay the real peak level of all the signal on 2.4Ghz. \n\nIf a fairly high amount of desense is always present this could explain why the downconverter is lacking sensitivity and why some normal \nfades appears deeper than they really are. And what is worse is the WI-FI QRM is also right on the received 2.4Ghz amateur band. \n\nHere i have to switch off my WI-FI router and my 2.4Ghz camera when i want to listen on 2.4Ghz and the camera is the worse as she give 30 \nover 9 very wide spread signal. \n\nOpinions are welcome. \n\n\n\"-\" \n\n\nLuc Leblanc VE2DWE \nSkype VE2DWE \nwww.qsl.net/ve2dwe \nDSTAR urcall VE2DWE \nWAC BASIC CW PHONE SATELLITE \n\n \n\n_______________________________________________ \nSent via [email protected]. Opinions expressed are those of the author. \nNot an AMSAT-NA member? Join now to support the amateur satellite program! \nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb \n", "attachments": [] }