June 2009 - AMSAT-BB - mailman.amsat.org

Dual Band (144/430) antenna.
by Juan Carlos 08 Jun '09

08 Jun '09

Hello. Am looking for information about vertical dual band (144/430 mhz) antenna to work some LEO satellites. Something like a 6/8 (144) and 3x5/8 (430) like X-50 from Diamond or 1/4 (144) and 2x5/8 (430) like X-30 also from Diamond. Or somthing like that. Thanks in advance. Juan Carlos, CO8TW. ----------------------------------------------------------------- ----- Juan Carlos Veranes Ferrer CO8TW ----------------------------------------------------------------- ----- e-mail juanc(a)sssn.ciges.inf.cu http://www.qsl.net/co8tw/ Apartado Postal 8, Santiago de Cuba, CP 90100 Work Phone 53-22-653949 and 653958 ----------------------------------------------------------------- -----

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Proposed AMSAT-NA Symposium Paper
by Bill Ress 08 Jun '09

08 Jun '09

Hi Dan, I will be submitting a paper entitled: "A Linear U/v Transponder for SuitSat2" Abstract: SuitSat2 will incorporate several advanced circuit functions which will be directly applicable to the "modular" development program under way at AMSAT-NA. One of the SuitSat2 modules, the linear U/v RF transponder, uses the latest in solid state device technology to provide a very efficient 1/2 watt 145 MHz transmitter and a low noise 435 MHz to 10.7 MHz down converter. The design philosophy and circuit details will be presented. Regards...Bill - N6GHz

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Fw: Capitol Hill Briefing on Space Debris and Collisions (Wednesday)
by Bob Bruninga 08 Jun '09

08 Jun '09

I wonder if some AMSAT VIP's in the DC area should go to this: *Coffee Briefing on Space Debris and Collisions* *Wednesday, June 10, 2009* *9:00am - 10:00am* *2253 Rayburn* *Keeping Our Space Assets Safe From *an Increasingly Crowded Space Environment, If I was in DC, I would go to represent Student Satellites, but I am in Alabama on travel. Our position should fully support the mitigation of space debris, but we must make sure that the regulations are not overly burdensome to the small guys. I reviewed a first draft that was ONLY written for the 100 Million dollar Launch Provider. It placed an extrordinary burden of "tests" and "reports" and bureaucratic processes that of course would be routine for the Space COmpany with an army of lawyers in their employ, but there was no provision for the small 1kg student payload for a simpler process. This meeting is not the place to speak up, but it is the place to learn and to circulate and network and get a copy of what is being considered. Im far from my desk and so have none of my AMSAT contact info, to try to get this to the AMSAT folks that might be able to get to the meeting. Maybe one of them will see it here and can see about an amsat presence? Bob, WB4APR

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Re: HF satellite?
by John Magliacane 08 Jun '09

08 Jun '09

--- On Sat, 6/6/09, Vince Fiscus, KB7ADL <vlfiscus(a)mcn.net> wrote: > > Now that post brought back memories. :-) > There was a robot on RS 10/11 too. > KB7ADL > Here's a snippet from March 6, 1988 at 2039 UTC, 145.830 MHz up, 29.453 MHz down: http://www.qsl.net/kd2bd/rs11-robot.mp3 I was keying an FM rig to produce the uplink. The downlink was received using a converted Hy-Gain CB board (used for 10-meter FM operation in previous years) in concert with a 455 kHz ceramic resonator as a narrowband IF filter. 73, de John, KD2BD -- Visit John on the Web at: http://kd2bd.ham.org/ . . . .

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2009 AMSAT Annhual Meeting and Space Symposium - Call for papers
by Daniel Schultz 08 Jun '09

08 Jun '09

This is the first call for papers for the 2009 AMSAT Annual Meeting and Space Symposium to be held October 9 - 11 at the Four Points Sheraton Hotel at the Baltimore Washington Airport. Proposals for papers, symposium presentations and poster presentations are invited on any topic of interest to the amateur satellite community. We request a tentative title of your presentation as soon as possible, with final copy submitted by September 1, 2009 for inclusion in the printed proceedings. Abstracts and papers should be sent to Dan Schultz, N8FGV, at n8fgv(a)amsat.org.

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Re: unknown packet signal
by Bob Bruninga 07 Jun '09

07 Jun '09

> I'm in Orlando, Florida. Can someone let me know > which satellite I just received around 20:54 UTC > on 145.825 MHz running packet? I am on a 1800 mile round trip too, and when I cant find anything else on 2m, I let the radio sit on 145.825. Then when I hear ISS, then I know that I will have passes 91 and 182 minutes later. Then for the rest of this trip, I just remember that each day the pass is 23 minutes later or, every other day the ground track repeates but 51 minutes earler each day, and I can always predict when it will come over again. When it does, I QSY the APRS side of my radio from 144.39 to 145.825 for the pass, and I can work em. THen just remember when the next pass will be. You dont need no PC... see http://www.aprs.org/MobileLEOtracking.html So it was good to see ISS back on the air. There is a scientific team headed to Mongolia and they hope to be able to communicate via APRS text message from a handheld, and are dependend on ISS being on the air, and for ground stations in Japan to hear them and IGate them into the APRS system. Bob, WB4APR

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KENWOOD TS-790A with 1.2ghz for sell
by R. Chastain 07 Jun '09

07 Jun '09

Hi all, I'm selling my Kenwood TS-790A with 1.2ghz, voice module, matching SP-31 external speaker, and (NIB) IF-232 computer module. I'm basically selling most of my gear due to failing health. The TS-790 is one of the best VHF/UHF radio's ever made. If you check the reviews for this radio you will see what I'm talking about. CTCSS/PL encode is built in so getting into tone activated systems is a snap. The radio does not have PL decoder modules but those are still available through 3rd party makers if you need them. Most people don't. I have the original box for the radio but I'm not sure if I have the speaker box. I do have the manual but it's a bit dog eared from use. Sorry, but I will not seperate the package. Cosmetically, I would rate the radio an 8+ on a scale of 10 only because of a very small scratch on the far right side of the display. If you didn't know it was there you wouldn't know it. It's really not worth mentioning but I trey to decribe everything the best I can. Also the plastic carrying handle on the side has been romoved by a previous owner. The screws are still there but the handle has been removed. Electrically, the radio is a 10. NO problems whatsoever. It meets or exceeds all manufacturers ratings. Will sell all for $1300.00 plus shipping. Thanks for looking, RoD

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Re: HF satellite?
by George Henry 07 Jun '09

07 Jun '09

Last I saw, he said "...we have not made up our minds" on the HF-to-HF transponder. A couple of years ago, when we were all talking about "Toss-Sats" (ready-built satellites that could be flown on a moment's notice and hand-launched from the shuttle or ISS, like SuitSat), I was going to actually throw a Mode A transponder together from an old Sonar commercial VHF rig on 2M, and an old CB (converted to 10M), just to satisfy myself that it could be done that cheaply. Never got around to it, though.... Yet... George, KA3HSW ----- Original Message ----- From: <G0MRF(a)aol.com> To: <ka3hsw(a)att.net> Sent: Sunday, June 07, 2009 1:18 PM Subject: Re: [amsat-bb] Re: HF satellite? [snip] > > Hi George. > > Good plan. But if Bob's plan for PSK31 is the same as PC Sat 2 you need > to > demodulate the PSK31 into audio and then connect that to a 2m FM > transmitter. (Didn't Bob change his mind about the 24M TX in a later > mail?) > > Need more detail from Bob I suspect. > > Thanks > > David >

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AO-7 Seattle to UK
by w7lrd＠comcast.net 07 Jun '09

07 Jun '09

Hello There is a short "window" between Seattle (CN87) and Northern Europe at 2212Z. I will be on 145.958 +/- a little. Make my day! 73 Bob W7LRD CN87

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CP-6 Decode
by James Denneny 07 Jun '09

07 Jun '09

I am new to cubesats & am having decode issues. I have the Polysat CPX decoder and finally got correct keps pasted into decoder preferences>satellite. I am using SAT-PC32 and have appropriate keps and freq data loaded. Program tracks CP-6 correctly and agrees with tracking info in CPX decoder. Radio is IC910H in LSB mode and radio is tracking SAT-PC32 doppler freq data OK. Today (June 7), I had a decent pass with reasonable EL. Antenna are tracking CP-6 ok via SAT-PC32. I heard nothing during today's 10 min pass. I believe I have another issue beyond not hearing signal. I am using an AEA DSP2232 tnc between IC910H and CPX decoder. It is set for 9600baud packet data from copying now defunct GO-32 BB. I believe I need to figure out how to set it up for 1200baud FSK. Is that correct? Jim K7EG

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