May 2010 - AMSAT-BB - mailman.amsat.org

AMSAT Announces 2010 Space Symposium Will Be Near Chicago
by JoAnne Maenpaa 30 May '10

30 May '10

AMSAT announces the 2010 AMSAT Space Symposium and Annual Meeting will be held on Friday, October 8 through Sunday, October 10. This year we have selected the Chicago/Elk Grove Holiday Inn which is near O'Hare Airport for the event. This is the same hotel that recently has hosted the Central States VHF Conference, Digital Communications Conference and NIDXCC events. All Amateur Radio Operators interested in space communications are invited to participate in the Symposium offerings including: + Space Symposium with Amateur Satellite Presentations + Operating Techniques, News, & Plans from the Amateur Satellite World + Board of Directors Meeting open to AMSAT members + Meet Board Members and Officers + Annual General Membership Meeting + Annual Banquet-Keynote Speaker and Door Prizes + President's Club Reception + Area Coordinator's Breakfast The Chicago/Elk Grove Holiday Inn is located at 1000 Busse Road, Elk Grove, IL (near O'Hare Airport with free hourly shuttles). The room rate and reservation information will be announced shortly. Watch http://www.amsat.org/amsat-new/symposium/2010/index.php for more news as it becomes available. -- 73 de JoAnne K9JKM k9jkm(a)amsat.org Editor, AMSAT News Service Copy Editor, AMSAT Journal

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QRM from Italy on AO-27
by OZ1MY 30 May '10

30 May '10

Hi in Italy, I just listened to a pass of AO-27 with AOS at 1406 UTC here in Copenhagen. There were 2-3 Italian stations on in terestial communications. They were radio amateurs using calls - but too fast for me to make out. IW9??? and IZØ???. I am not sure but may be it is a repeater. There were a distinct 67 Hz tone on. I could make out two city names: Catania and Modena. If some satellite users know what it is please try to make them stop. Have a nice Sunday. 73 OZ1MY Ib

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UO-22 just 100000 on 3rd Aug 2010
by Mineo Wakita 29 May '10

29 May '10

I noticed that UO-22 might be passed over just 100000 of the orbit number before long. UO-22 was launched on 17 July 1991. It's now Non-Operational. UO-22 1 21575U 91050B 10148.66466669 -.00000020 00000-0 77105-5 0 8445 2 21575 98.4922 98.6195 0008358 67.4032 292.8038 14.39719412990416 The above kep is 'NORAD TLE Sets Current Data'. The orbit number is 99041, so 959 to 100000. 100000 - 99041 = 959 ... orbit numbers until 100000 959/14.39719412 = 66.61020140 ... orbits/mean motion = days 148.66466669 + 66.61020140 = 215.27486809 ... epock time The epock time 215.27486809 is 06:35:48 UTC, 3rd Aug 2010. It maybe contains +/- one and a half hour's obserbational lag. In addition, the counter number returns to 0 when the orbit number exceeds 100000. JE9PEL, Mineo Wakita

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Yeasu/Kenpro KR-500 mast clamps
by Joe 29 May '10

29 May '10

Hi All, By any chance does anyone have any spare mast clamps for this rotor. I need 2. Any help?? Thanks Joe KI4TZ

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P3E/P5A S -> X transponder
by Michael Fletcher 29 May '10

29 May '10

Hi all ye Microwavers, AMSAT-OH is working on the S/X band coherent/linear transponder for P3E. The Coherent mode is a fully functional testbed for the P5A ranging transponder. Especially the linear transponder prototype has been assembled and verified with over-the-air tests and laboratory tests. Flight versions of the submodules have been and are being produced at this time with our eyes now set on integrating these together and cabling the whole job together. Full verification of the Coherent Mode requires a fully functional command station AND a functional IHU + CAN environment to interface our data ports with. No such tests have been available yet, but all our preliminary testing and evaluation of the Coherent Processor have shown proper operation of the design and circuitry (e.g. locking onto a "modulated" uplink carrier, tracking this etc.). So far correct live operation of the Coherent Mode is our biggest questionmark. Our national team meets on a regular basis every 4 - 6 weeks for testing and followups of the work of each individual. This transponder is especially complex as you can see from these key figures: * 9 different local oscillators * All local oscillators locked to the common 10 MHz USO * 21 different frequency mixers * 13 different intermediate frequencies * Linear Mode output power on 10 GHz: 3 W PEP * P5A Mode output power on 10 GHz: 1 mW PEP * 38 control lines on the CAN interfaces * 2 CAN interfaces, one in multiplexed mode * 4 dedicated direct control lines interfacing with the IHU * 14 analogue telemetry lines to the CAN bus * Coherent Mode Uplink/Downlink ratio is fixed at 30:7 Here you may find a general outline webpage, though unfortunately in Finnish for the benefit of our OH supporters, but you might still enjoy the photos and drawings: http://www.rats.fi/rats/amsat-oh/ Our team sincerely hopes funding will eventually be found for P3E/P5A - this is the only thing that keeps us motivated to continue our work. On the other hand we are clearly behind schedule, so the delays are welcome :-) But then again, any news of progress would boost our production rate phenomenally ;-) 73 Michael, OH2AUE -- "Life is too short for Sudoku"

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NEGAI* via skype
by Mike Rupprecht 29 May '10

29 May '10

Hi, Today I made an exciting experiment together with my friend Tetsu san JA0CAW. Since we can't hear NEGAI* in Central Europe we established a live link between our stations. Tetsu gave me access to his PC via remote control (VNC) and I could control his transceiver. We established a second connection via skype for audio. The audio quality was excellent and I could hear NEGAI at a 10 deg pass over the Pacific Ocean :-) See here: http://www.dk3wn.info/p/?p=15176 73, Mike DK3WN

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Scheduling APRS client through ISS
by Alan P. Biddle 29 May '10

29 May '10

Hi, I came across the post below on a Usenet group. I am only a very occasional ISS APRS user, but have noticed several of the regulars here when I do operate. My impression is that it is either largely a non-problem, or better solved through the APRS client. Can anyone suggest a good answer which I can cross post? Alan WA4SCA ============================= I want to somehow disable the PTT on my TX from SatPC32 when the satellite is below the horizon. This is very pertinent to running APRS through ISS. At present I have to be stop my APRS program and restart it manually at the correct times and I keep missing passes. I suspect I would need to use DDE to link to some sort of port control program or maybe via rotor control but am not experienced in using DDE. Is there any SatPC32 guru who can make some suggestions? Thanks from Dick G4BBH

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micro duplexor
by Douglas Anoman 29 May '10

29 May '10

Hello, If anyone is interested; I have micro duplexers for dual band antenna projects. I started building them for some of the the clubs in my area. 73 Thank You Douglas Anoman KC9MLN KC9MLN(a)AMSAT.ORG Amsat #37043 _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28…

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My apologies
by ps8rf Piraja 28 May '10

28 May '10

My apologies for writing upper case letters the title of the call ZW8B DXpedition. Thanks. Pirajá, PS8RF _________________________________________________________________ QUEM VOCÊ QUER SER HOJE NO MESSENGER? TRANSFORME SUA FOTO, É GRÁTIS. http://ilm.windowslive.com.br/?ocid=ILM:ILM:Hotmail:Tagline:1x1:Tagline

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Re: Diamond X-30A SO-239 - New in Bag
by Clint Bradford 28 May '10

28 May '10

Sold - that is $100 bucks to AMSAT for five minutes' work. This is fun. Tell a friend. Clint, K6LCS 909-241-7666 On May 28, 2010, at 1:09 PM, jeffk13057(a)yahoo.com wrote: Me! Me! Pick me! 73, Jeff WB2SYK

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