March 2007 - AMSAT-BB - mailman.amsat.org

Re: SO50 NOT HEARD???
by David Bird 15 Mar '07

15 Mar '07

HI AMSATS, SORRY ABOUT MY EARLIER POST ON SO50 NOT BEING HEARD MUST BE MY ANTENNAS ACTING UP. 73 DE KC7USS _________________________________________________________________ Rates near 39yr lows! $430K Loan for $1,399/mo - Paying Too Much? Calculate new payment http://www.lowermybills.com/lre/index.jsp?sourceid=lmb-9632-18226&moid=7581

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[hpsdr-dev] Odyssey Siren A success
by Joe Leikhim 15 Mar '07

15 Mar '07

Is there a website where this experiement is described? I tried TAPR but couldn't find anything. -----Original Message----- From: Robert McGwier [mailto:rwmcgwier@gmail.com] Sent: Tuesday, March 13, 2007 2:36 PM To: High Performance Software Defined Radio Discussion List Cc: amsat bb Subject: [hpsdr-dev] Odyssey Siren A success We had a complete breakthrough on the Odyssey Siren in the past two weeks. It will be used in Suitsat 2, in a terrestrial linear repeater experiment by Viktor Kudielka OE1VKW and friends, who supported its development, and we are already leaping all over the place to applications. Frank Brickle and I will be doing our SDR code on it over the next several days. The board as shown in the schematic needs some modifications to fix the 3 - ish volt power supply for the Codec and a modified oscillator circuit but we are certain it will all work now. On the 10.7 MHz IF, I measured 0 dBm max into a 50 ohm load and less than -120 dBm MDS and > 80 dB dynamic range. This is with a BOM of < $50 in parts and about a $20 dsp pic chip! Yesterday in Rick's lab, with W2GPS, K3IO, we made the above measurements, hacked on code and turn the thing into a bent pipe transponder. I also did the hilbert transform to make it an inverting transponder. It all worked perfectly. http://www.cnssys.com/~w2gps/amsat_files/suitsat/ has detected audio in an SDR-IQ SDR as well as captured IF from the SDR-IQ of the transponder. We have to balanced for image and do DC offset correction but the thing works and sounds great as you can hear for yourself! 73's Bob N4HY -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P

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ISS Columbus Antennas
by Trevor 15 Mar '07

15 Mar '07

ISS Columbus Antennas http://www.southgatearc.org/news/march2007/ariss_antenna_donations.htm 73 Trevor M5AKA --------------- Daily Amateur Radio RSS News: http://www.southgatearc.org/ Email your news items to: editor at southgatearc.org News On Your Website: http://www.southgatearc.org/rss/index.htm News On Your PC: http://www.southgatearc.org/rss/newsreader.htm Upload Your News: http://www.southgatearc.org/news/your_news.htm --------------- ___________________________________________________________ Copy addresses and emails from any email account to Yahoo! Mail - quick, easy and free. http://uk.docs.yahoo.com/trueswitch2.html

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AO-51 to switch to V/S 38k4 for 25 hours at 15MAR07, 0100Z
by Andrew Glasbrenner 14 Mar '07

14 Mar '07

At the request of the ALMASAT team AO-51 will switch to V/S 38k4 digital operation from about 0100Z on 15Mar2007 to 0200Z 16Mar2007. The frequencies will be as follows: Downlink 2401.200 MHz, FM digital, 38k4 bps Uplink 145.86 MHz, FM digital, 9600 bps ALMASAT is an Italian university microsat mission with both U and S band downlinks. As the only operative 38k4 S-band satellite we will support the testing of the ground stations of soon to be launched amateur satellites whenever possible. It is my personal hope that continued cooperation will result in more amateur payloads being made available to the AMSAT community. I apologize for the late notice on this mode change. Over the next two weeks we will be testing the automatic scheduler software, and myself or someone else from the team will make announcements regarding modes and times. 73, Drew KO4MA AMSAT-NA VP Operations

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SO-50
by Tim Tapio 14 Mar '07

14 Mar '07

Anyone work SO-50 during the 1842Z pass? I didn't hear a thing...wondering if my receive went deaf.... 73 de Tim, K4SHF FM04

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WD9EWK at Scottsdale AZ hamfest, 10 March 2007
by Patrick STODDARD (WD9EWK/VA7EWK) 14 Mar '07

14 Mar '07

Hi! I was at another Phoenix-area hamfest last weekend, the Scottsdale Amateur Radio Club's "Springfest" at Scottsdale Community College. The AMSAT table that had been at two other Phoenix-area hamfests this winter was in Scottsdale, and with me there was Gerry VE4GTB/KD7MDB (from Winnipeg, but spends the winter in Arizona) and Larry W7LB (from Tucson AZ) to take care of questions, sales, and the satellite demonstrations. We had a visitor who stuck around the table for much of the morning (AO-51 regular Brock W6GMT, on his road trip from southern California to Minnesota), helping with the questions and the satellite demonstrations. With great weather and turnout, this was a successful event. Ron W6ZQ from southern Arizona also stopped by the table, another AO-51 regular. As with most hamfests in the Phoenix area, things get started at 0600 local time (1300 UTC). There were two AO-51 passes that we planned for our demonstrations - 1445 and 1625 UTC. Even with the crowds on both passes, WD9EWK was heard on both passes and contacts were made. We had 9 contacts logged on the 1445 UTC pass , and 4 contacts on the 1625 UTC pass. For those 13 contacts, 9 were with USA stations, 3 were with Mexican stations, plus one maritime-mobile contact with W3PM/MM who was in the eastern Pacific Ocean (grid CM60) at the end of the later pass. The next-to-last contact on the later pass, with Manuel XE2BHL in Tijuana, was the 2000th satellite contact for WD9EWK - something I did not realize until I logged these contacts at home later in the weekend. By noon (1900 UTC), the hamfest was wrapping up. Most of the sellers were either getting ready to leave or had already left, and we closed up our AMSAT table. Lots of flyers on how to work AO-51 and the other FM satellites had been picked up, and we sold almost $200 in AMSAT merchandise. This was the third time I had been part of an AMSAT table at a hamfest, probably the last time until the next hamfest season here in the Phoenix area next fall/winter, and once again I enjoyed it. Thanks to Gerry Baker VE4GTB/KD7MDB for his efforts in getting the AMSAT merchandise and for taking his time while enjoying the Arizona winter to be at the AMSAT tables for these 3 hamfests, and Larry Brown W7LB for making it up to Phoenix for 2 of these 3 hamfests with his shade and tables. Also, thanks to Brock Thomsen W6GMT, who spent much of the morning around the AMSAT table talking with us and anyone else stopping by with questions about AMSAT or satellite operating. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

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JA3GEP Email Address
by Luciano G. Nachif 14 Mar '07

14 Mar '07

Hello folks! I would like to get Mr. Mikio Mouri JA3GEP email address. Are there any Japanese operators on this BB that could help me, please? I thank you in advance. Best 73, Luciano Gasparini PT9KK

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Correction
by Edward Cole 14 Mar '07

14 Mar '07

> I was fortunate to have a few hams help me on my table when they > saw I needed some help. KK7YY(sk) flew to Alaska a couple years > running and did the Leo demos for me as well as helping at the table. Sorry, my memory failed: I meant Jerry, KK5YY. If there is a KK7YY, my apology! 73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep dubususa(a)hotmail.com ======================================

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ARISS Mission Viejo Post Contact Media
by Matt Bennett 14 Mar '07

14 Mar '07

Thanks to many of you who tuned in on Friday morning to listen to Mission Viejo's second attempt to contact the Commander Michael Lopez-Alegria on the International Space Station! The direct connection to the station was established at 7:23 AM PST and lasted for seven full minutes before the station dropped behind our local Saddleback Mountains. Since the event, we have updated the website to include new photos, an MP3 recording of the contact, video recordings straight from the contact room, and a link to the article written about it in the Orange County Register last Saturday. Please take some time to view this new media at: http://ucisat.eng.uci.edu/uplink Thank you all very much for your interest and support in this exciting event! We appreciate it very much. Best regards, Matt Bennett KF6RTB K6UCI Control Operator for Mission Viejo / ISS Contact --------------------------------- It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar.

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S band rx system for sale
by w7lrd＠comcast.net 14 Mar '07

14 Mar '07

Hello I put together an S band system for a friend. He changed his mind, tried to sell it at a flea market, no go. I will try this list before ebay. It is a 24x19 inch dish, 5 1/2 turn helix feed, 3731aa downconverter with power supply, and mounting brackets to fit over elevation rotor. Pictures and more details upon request. 73 Bob W7LRD Seattle

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