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

Sputnik-1 orbit parameters
by andy thomas 22 Sep '07

22 Sep '07

Following from the RAE table of earth satellites 1957-1980 Sputnik 1: 1957 a2 (a=alpha) launch date Oct 4.81 1957 Orbital determination - 1957 oct 4.8 Inclination - 65.1 (degs) Nodal period 96.2 mins Semimajor axis 6955 km Perigee height 215 Km Apogee height 939 Km Eccentricity 0.052 Arg of Perigee (deg) 58 1957 Oct 25.8: 65.1 95.4 6916 213 863 0.047 49 1957 dec 25.1 65.0 91.0 6702 190 458 0.02 23 descent date: 1958 jan 4 lifetime 92 days These look to me like Amsat type elements and I'm sure someone can turn them into standard nasa TLE's but i'm 3 mins away from a cubesat rx so 73 de andy G0SFJ ___________________________________________________________ Want ideas for reducing your carbon footprint? Visit Yahoo! For Good http://uk.promotions.yahoo.com/forgood/environment.html

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Re: Mounting antennas on a tower & Don't forget the PREAMP!
by John W Lee 22 Sep '07

22 Sep '07

I Agree with Steve, An Arrow antenna is about as end mounted as you can get, and look at all the success folks have had with them. I've made at least 1000 QSO's with my Arrow. Second comment: I've seen all the traffic regarding preamps, noise figures, etc etc etc. And the real bottom line is this: They help you hear better. No doubt about it. 73 John K6YK On Sat, 22 Sep 2007 12:56:31 -0400 Steven Raas <sraas(a)optonline.net> writes: > I can attest to the performance of end mount antennas! I have made > well over > 500 Sat contacts all with my end mount yagis. Photos and full > station > description avail on my website, the url is in the Signature of my > email. > > Any questions please feel free! > > 73 > > Steven J.Raas > QRV From FN20vg on 2/432 Terestrial-Sats-Digital-EME > Member of - ARRL & AMSAT > Supporter of N3FJP Software http://www.n3fjp.com > Home Page - http://n2jdq2007.tripod.com/ > >

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ATF-54143 preamp for 70cm
by Kyle Yoksh 22 Sep '07

22 Sep '07

Hello, A while back someone was offering a kit for a 70cm preamp that uses an ATF-54143 PHEMT device. I have a few of these 54143s, but haven't found time to acquire the rest of the parts, etc. Please let me know if anyone offers a PCB or full kit. Thanks and 73, Kyle Yoksh K0KN Olathe, Kansas Amsat# 35249

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Re: Mounting antennas on a tower
by Joe Krepps 22 Sep '07

22 Sep '07

Do end mounted antennas have enough gain for satellite work? The few I've seen look a little on the small side. Just wondering. 73, Joe WB3CFN

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APRS Satellite Status
by Bob Bruninga 22 Sep '07

22 Sep '07

Status of APRS satellites: http://pcsat.aprs.org ANDE - yes. http://www.ariss.net ISS - yes GO-32 - yes. Downlink now has bulletins ECHO - not at this time. PCSAT - You will notice however, that our predicted return of PCSAT-1 did not happen. She is in full sun but the sun is not far enough into the southern Hemisphere for recovery. Next full sun period is first week of Novermber when she should recover. Bob, Wb4APR

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Special Call AM3MM
by EB3SA - Carles 22 Sep '07

22 Sep '07

Hi to all During 22/23 September , It will be active: call: AM3MM grid: JN01WO AO-27, SO-50,VO-52, AO-51 (only V/U mode), and if is possible AO-7 (mode B) /The reason is the activation of the monastery of Montserrat located in Catalunya./ Please visit: http://www.qrz.com/callsign/AM3MM http://www.dxfun.com/modules.php?name=News&file=print&sid=1746 http://www.urb-ea3mm.org/ http://www.xtec.es/serveis/crp/a8903084/montserrat.htm http://www.muntanyamontserrat.net/ http://www.11setembre.org/index.php Thanks to all. -- Carles Roy eb3sa(a)eb3sa.com www.eb3sa.com

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W7 to JA
by w7lrd＠comcast.net 22 Sep '07

22 Sep '07

Hello JA's The last two orbits of AO-7 were in mode A. If it stays there the next orbit will have a short window from JA to W7. I will be on 29.450 cw at 0635-0640Z 9/22. -- 73 Bob W7LRD AMSAT member 28498 Seattle

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Mounting antennas on a tower
by Eric Christensen 22 Sep '07

22 Sep '07

I'm contemplating antennas and a tower at the new homestead and I have a question. If I can figure out how to mount an elevation rotator at the top of a pole and have the azimuth rotator rotating said pole from the tower would I have any problems with putting a small HF tri-band beam on the pole, below the elevation rotator, and then mount all my satellite antennas to the elevation rotator's pole? Has anyone done a combination like this? 73s, Eric Christensen, W4OTN AMSAT Area Coordinator - Southeastern Virginia USA AMSAT Member 35360 http://www.ericsatcom.net Donate to the Eagle Fund - http://www.amsat-na.com/donation.php?donate=eagle

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Re: Terrestrial QRM to FM satellites
by John Marranca, Jr 21 Sep '07

21 Sep '07

Hello all. I, too, have noticed this happen. I saw it first at the Rochester Hamfest this year when Rich N2SPI was giving his demo on the birds (...this is how I became interested in ham sats). During his excellent demo, two hams were chatting about pizza, and the like. I can recall this happening during the Mode K Russian sat days. Quite honestly, I think it's rude and selfish that any person would not follow a gentleman's agreement bandplan. (Reminds me of a local guy about 15 years ago that would talk to his buddies on 144.000 FM.) It's sad, really. John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

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Re: Terrestrial QRM to FM satellites
by dobarrows＠aol.com 21 Sep '07

21 Sep '07

This problem reminds me of a similar one we had with SO35.? But with SO35 the control ops could reverse the uplink and downlink freqs and give the QRMers a dose of their own medicine. -- Dave W8IJ ________________________________________________________________________ Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com

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