AMSAT-BB October 2007

151 participants
275 discussions

Call for Papers--2007 ARRL/TAPR Digital Communications Conference

by Ford, Steve, WB8IMY

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

9 years, 6 months

FS: Kenwood TS-790A + IFD board + TNC31S

by Francisco Costa, CT1EAT

Dear AMSAT friends My pacsat station is for sale: Kenwood TS-790A 144/432/1200 MHz transciever ============================================ with the following extras: * UT-10 1200 MHz module * Symek IFD-B board (for speed up to 76000 bd) and mods: * extended rx (on 3 bands) * 9600 baud tx/rx * 100ms mute disabled * IFD-B board (38400 baud rx) plus: * Hand microphone * DC cable * Instruction Manual (in english) include schematics * External Control Instruction Manual (in english) * Modifications documentation (in english) All mods were performed by me and no holes were done. This equipment was bought new (1997), and until now there was not a single problem! It was kept on a non smoking environment. Cosmetic is a 8/10 (one minor dent, sort of paint bubble and 4 rotator control box feet "stain", all on top cover) Unfortunatly I don't have the original box anymore. Sorry TNC Symek TNC31S ================ * Tx 9600/Rx 38400 baud card * 128kb RAM * 512kb Flash-EPROM * English mailbox * Kiss autostart including: * RS232 cable plus adapter (DB9) * DC cable * Diskette with software * Original Manuals (english and german) This TNC was bought new (2000), and was used on UO-36 and Tiungsat-1 with great sucess. I did't use it since a long time ago, but I belive it's 100% operational. Cosmetic is 9/10. I will only sale the 2 items together. Price: 1500 Euro Buyer pays shipping. Payment methods: Euro countries: Bank money transfer only! Elsewhere: Western Union or PayPal. Photos: please visit http://ct1eatsale.no.sapo.pt/ Thanks for your attention. See you on P3E or Eagle. 73 F.Costa, CT1EAT www.qsl.net/ct1eat

14 years

BBC NEWS | UK | Magazine | How to build your own Sputnik

by Bob Twiggs

Here is a challenge. http://news.bbc.co.uk/2/hi/uk_news/magazine/7049002.stm Bob KE6QMD

14 years, 2 months

AMSAT Mobile Satellites Galore

by Robert Bruninga

November should be a great Mobile Satellite Month. There are 7 satellites you can work from your mobile FM rig, including PCSAT-1 which should fully recover by this weekend and last for 2 or more weeks. So now is the time to get going with live satellite contacts via these easy FM satellites, or setting up a SATGATE (Igate). DOWNLINK SATELLITE -------- ------------------------------------- 145.825 ISS APRS digipeater 145.825 PCSAT-1 (recovery expected 3 Nov) 145.825 ANDE-1 (re-entry expected next month) 435.225 GO-32 +/- 10 KHz and 9600 baud 435.300 AO-51 *FM Voice* +/- 10 KHz 436.795 SO-50 *FM Voice* +/- 10 KHz 436.795 AO-27 *FM Voice* +/- 10 KHz As you can see, there will be over 40 passes per day with 18 for the 1200 baud satellites, 6 per day for the 9600 baud GO32 and 18 for the voice birds. All 1200 baud pass times are between about 6 AM to 1800 local sun time in the Northern Hemisphere. GO-32 and AO-51 voice birds are in the morning and evening, AO-27 is in the afternoon. It is trivial to know when to operate these birds WITHOUT A PC. Please see the manual-tracking page: http://www.ew.usna.edu/~bruninga/MobileLEOtracking.html The packet path on 145.825 is VIA ARISS for all three satellites. The path for GO-32 is VIA 4XTECH and uses two different uplinks: 145.85 for APRS software and messages. 145.93 for all Mic-E, D7 and D700 radios. That's more than one pass per hour on 145.825. Lots of contact potential from your mobile... For APRS birds: http://www.ew.usna.edu/~bruninga/pcsat.html http://www.ew.usna.edu/~bruninga/iss-faq.html http://www.ew.usna.edu/~bruninga/ande-ops.html http://www.ew.usna.edu/~bruninga/GO32-ops.html For AMSAT birds: http://www.amsat.org/amsat-new/satellites/status.php For many of these satellites, you don't even need a tracking program. Just a slip of paper on the dashboard... See: http://www.ew.usna.edu/~bruninga/MobileLEOtracking.html The best antenna is a 19.5" whip in the center of your roof. 5 dBi gain on the 2m uplink and almost 8 dBi gain for the very weak UHF downlink (above 25 degrees)... Watch for special event info. WB4APR, Bob

14 years, 2 months

Longer arms for you to reach your favourite sats.

by Kevin Forbes

Hi folks, someone I was in contact with recently gave me an url to visit. REMOTE RADIO http://www.remotehams.com/ http://www.remotehams.com/Online-Radios The site is in England, and has several radios online that you can adjust the tuning on. I went and had a look and a play. Then had an idea to try out. I tuned into a NOAA wxsat on the 137 MHz band when my sat tracker said it was over England. I then started the WxSat program that turns the telemetry into images. I had to tick a different box on the sound cards recording settings, and then it happened. For the first time, I was receiving an image of Europe from a VHF NOAA sat, via the online radio. Thanks to the folks that made this site possible, I love it. _________________________________________________________________ Advertisement: What are you waiting for? Join Lavalife free. http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2…

14 years, 2 months

geo stationary bird

by w7lrd＠comcast.net

Hello To play the devils advocate for a moment. With a geo (stuck) sattelite we are pretty much stuck with the same foot print forever. Unless of course there is some sort of cross linking in the future. I very fondly recall AO-40 and bringing it up on my computer and seeing where the foot print was today. Maybe it's the Europeans or perhaps the VK's, ZL's (love their accent), or maybe some JA's, (practice my Japanese). At some time, I knew I could cover the whole planet. I do of course believe this is an excellent opportunity, though there are a some limitations. -- 73 Bob W7LRD AMSAT member 28498 Seattle

14 years, 2 months

Doppler compensation??

by Dave Guimont

Can someone explain this "new" thing about the difficulty in compensating for doppler? I used to do it with one hand on a knob, or with one of the many programs available. Has something changed?? 73, Dave wb6llo(a)amsat.org Disagree: I learn.... Pulling for P3E...

14 years, 2 months

Phase 4

by John Marranca, Jr

Say it isn't so. Say it's just a dream.... Just this past weekend, I was reading an OLD QST from 1974 that had mentioned the notion that AMSAT wanted a geo-synch satellite by 1975. How amazing. The thought was kicked around on a local AMSAT 2-meter net in the early 1990 (back during the Mode K days of yore). Imagine...ULTRA RELIABLE DX...24 hours per day. Those with antenna restrictions or home-owner's covenants could be QRV. And if the up/down links were UHF and above, a pair of helices could be used INSIDE, pointing through a window.... Just a thought, though. What about our European and Asian friends? Could facilities be included so that geo-synchs over their respective footprints could be linked? Or possibly the satellite being "parked" over an area that could include the US and Europe? I realize that it is all dependent on the space that the host bird has. This is truly exciting! John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA Local 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

14 years, 2 months

WiSP on Vista

by Mineo Wakita

I confirmed that gsc.exe could not work on Windows Vista. We can setup seemingly WiSP on Vista, but gsc.exe can not run with a error message. I guess that the correct setup information are not written into Registry. de JE9PEL, Mineo Wakita

14 years, 2 months

Re: AMSAT Store Down?

by Eric H Christensen

And the store is back! Thanks Paul and Martha. 73s, Eric W4OTN I just got off the phone with our domain name provider (on hold for 52 minutes). It WAS suppose to renew automatically. They have no idea why it didn't. It should be restored soon. On 10/31/07, Eric H Christensen <eric(a)christensenplace.us> wrote:Don't you love how that works? Thanks Paul! 73s, Eric W4OTN >>I just tried to access the AMSAT Store but the site failed. Anyone else >having this problem? > >The domain name AMSAT-NA.COM, which was supposed to auto-renew, was allowed to >expire. >We will get it restored as soon as possible. > >73 -Paul >kb5mu(a)amsat.org _______________________________________________ Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb -- 73- Martha

14 years, 2 months

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AMSAT-BB October 2007