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GET /hyperkitty/api/list/[email protected]/email/4WYCXQANKOGRS7YRBOTW4LN2JWD3FVAP/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4WYCXQANKOGRS7YRBOTW4LN2JWD3FVAP/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "4WYCXQANKOGRS7YRBOTW4LN2JWD3FVAP", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/YOIAKW2GN3VSXDUK73BEGVJBM64XJNJL/", "sender": { "address": "lmoline (a) hotmail.com", "mailman_id": null, "emails": null }, "sender_name": "Loren Moline WA7SKT", "subject": "[amsat-bb] Re: [Hearsat] Opinions on receivers", "date": "2009-10-07T03:48:28Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FTD4M323JKPM2LG6TJJGYMCANMXJAI5V/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "\nHello guys,\n\nOne other thing I have found is that the tracking of the varactor tuning may not be as good as it once was. As far as the capacitors I looked at my receiver and being a newer production it does not have the same DC board as the older serial numbers. My DC board looks good and I scoped the DC lines and they are clean..\n\nI have more testing and possibly a re-align of the bandpass filters to do but for now the receiver is ok...\n\nI want a second receiver and thats why I asked about receivers.\n\n \nLoren WA7SKT\n\n \nMember: ARRL and Pacific Northwest VHF Society\nMember: Hearsat Satellite Monitoring Group\nLocation: CN86cx \n \n \n\n\n\n\n\n\n\n\n\nFrom: [email protected]\nTo: [email protected]\nCC: [email protected]; [email protected]\nSubject: RE: [amsat-bb] Re: [Hearsat] Opinions on receivers\nDate: Tue, 6 Oct 2009 20:41:20 -0700\n\n\n\n\n\n\n\n\nREALLY? Great tip! It's never been a great receiver, but anything will help.\n\nI'll do some Googling around, but would you happen to have a pointer to more detailed information on the repair?\n\nThanks,\n\nGreg.\n\n\n> Date: Tue, 6 Oct 2009 23:24:49 -0400\n> From: [email protected]\n> To: [email protected]\n> CC: [email protected]; [email protected]\n> Subject: Re: [amsat-bb] Re: [Hearsat] Opinions on receivers\n> \n> Greg D. expunged ([email protected]):\n> \n> > \n> > But, as a general coverage receiver or scanner, it's 20-year age clearly shows. First of all, it's a bit deaf by modern standards. The local NWS weather channel is an S6 or S7, being fed by a very large TV antenna, with Preamp, in the attic. It's full scale on my HT with its rubber duck antenna in the shack. My S-band equipment (Drake 2880, and all that) barely gets above S1 or S2. You get the idea. \n> \n> Keep in mind that the lack of receive sensitivity in the R7000 most likely is due to old leaking electrolytic caps. Specifically, there is a DC-DC converter board on the underside of the receiver that ends up generating broadband noise as the caps fail over time. I recently rebuilt this board and have regained nearly all of the sensitivity that I've lost. I suspect that if I replaced more electrolytics I could have it back to factory specs. \n> \n> \n> -Steve\n> \n> N1JFU - http://n1jfu.blogspot.com - smeuse@twitter\n> \n \t\t \t \t\t \nYour E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign up now. \t\t \t \t\t ", "attachments": [] }