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

Re: AO-7 (A)
by Reicher, James 04 Sep '07

04 Sep '07

My choice would be a 2 element beam, but if your XYL nixes that, a vertical would perform well. I've used my HF9V vertical to receive Mode A with acceptable results. 73 de N8AU, Jim in Raymore, MO Light travels faster than sound... This is why some people appear bright until you hear them speak. Date: Sun, 2 Sep 2007 21:33:03 +0100 From: "TERRY BROMLEY" <terry.bromley(a)btinternet.com> Subject: [amsat-bb] AO-7 (A) To: "AMSAT" <amsat-bb(a)amsat.org> Message-ID: <007901c7eda0$774a8070$c6097ad5@homefe58dd0336> Content-Type: text/plain; charset="iso-8859-1" Hi Sat Fans, just back from my weekend villa. Reading the BB about 7 being in mode A, does this mean i have to find a decent ant for 10mtrs. My little HF G5RV doesn't work to well on 10mtrs. I will check the next pass at 10:03 local time (Sunday) i will keep you informed about the ant, my wife Kathy say's no more bird perches Hi. 73 all Terry G1WPR.

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Now you see it, now you don't ... the sun, that is.
by John Hackett 04 Sep '07

04 Sep '07

To whom it may concern, Please be aware that the NOVA eclipse predictions DO NOT always agree with other eclipse prediction software. This *can* account for certain discrepancies. The "trick" is to use 3 different programs and pick the "averages". 73 John. <la2qaa(a)amsat.org>

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FO-29 sked 5-20 Sep
by Mineo Wakita 04 Sep '07

04 Sep '07

Sep 5 3:35 - 5:21 - 8 4:20 - 6:10 - 9 3:27 - 5:12 - 11 3:25 - 5:07 - 12 4:12 - 6:00 - 13 3:20 - 5:03 - 14 4:07 - 15 3:15 - 4:58 - 16 4:05 - 5:50 - 17 3:10 - 4:55 - 19 3:05 - 4:50 - 20 3:55 - 5:40 - de JE9PEL, Mineo Wakita

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AO-7 report 4th Sept:
by John Hackett 04 Sep '07

04 Sep '07

Hi All, At 07:56 on orbit 50112 AO-7 was DEFINATELY in mode-A. The downlink was fluttering but this time it wasn't due to alligators. There was no-one else in the passband for the first 10 minutes of the pass over Europe. I lost the satellite behind the moutains at 85 degrees Az from QTH ... (this is where SV1BSX usually takes over). Presumably, the mode change occured sometime between 01:45 and 01:55 like the day before yesterday ... and that both the OFF and the B entry in the log for this morning are incorrect ... (see my previous mail) ... it is unlikely that the mode changed twice !!! within 1 hour ... though it *is* theoretically possible under certain circumstances. Again ... we need to monotor over time to get a fairly reasonable idea of current transponder switching. PLEASE !! do ensure the information you enter in the log is correct ... thank you, it is appreciated. 73 John. <la2qaa(a)amsat.org>

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Predicting AO-7's schedule.
by John Hackett 04 Sep '07

04 Sep '07

Hi All, It is difficult to predict or assertain the current operating schedule for AO-7. On orbit 50109 AO-7 changed from mode-B to mode-A as confirmed by K3SZH working W8IJ ... (in mode A) ... One would expect the satellite to stay in one particular mode for 24 hours .... (like yesterday)... but AJ9K logged mode-B at 02:00, as did RW3XL on orbit 50110 ... before W7LRD logged the transponderr as OFF on orbit 50111. Be aware that 'some' stations log the transponder as off either because they are not too careful with the log entries ... or ... the transponder is in fact on in mode C but they can't hear it. Two things are certain ... 1) The transponder is *NOT* behaving as one could expect. My observations are also verified by SV1BSX "further down the line" ... (later in the pass). 2) We need to observe the changes over many days to get some idea of predictability. 73 John. <la2qaa(a)amsat.org>

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ATTENTION: Domain "amsat-dl.de"
by Peter Guelzow 03 Sep '07

03 Sep '07

Hello All, I would like to point out expressly that AMSAT DL has nothing to do with current domain “www.amsat-dl.de” The domain belonged in former times to Reinhard Richter, DJ1KM and served occasionally as a mirror, when we had some server problems at that time. At expiration the domain was immediately taken over and blocked by an IT-company. A search in the Internet resulted in the fact, that the new owner was frequently known for dubious domain grabbing activities.. Again, AMSAT-DL expressly dissociate from the domain "www.amsat-dl.de” and we will also not use this domain in future.. Webmasters of other AMSAT or private homepage should make sure, that all links to AMSAT-DL are directed to http://www.amsat-dl.org Thank you, 73s Peter DB2OS

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China Says Work Under Way to Mitigate Space Junk
by Eric H. Christensen 03 Sep '07

03 Sep '07

Thought I'd pass along this article. <http://www.space.com/spacenews/070903_businessmonday_china_debris.html> 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 GPG Key Fingerprint: 4675 2BBE 666B 8FF7 A9A1 4D00 67F2 1E7A B685 F578

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AO-7 POWER-mongers.
by John Hackett 03 Sep '07

03 Sep '07

Hi All, Snipped from Dave's WB6LLO post re: power-mongers on AO-7. >BUT.....some dork running tons of power managed to overpower us at every >attempt...deliberately??? or otherwise... >First time I've had that happen in over 27 years of satellite >operation...where do these guys come from?? We really do need to nip these guys in the .... err ... (bud) ... and teach them it's *NOT* like AO-51 where the "mine's bigger than yours" mentality prevails ... (he means FM "capture effect, folks). There are recommended operating proceedure notes on the AO-7 Resource Page, lets encourage the potential newcomers to linear transponders to *READ* them. 25 watts *EIRP* is more than enough to work AO-7 ... PROVIDED ONE USES AN AERIAL and has a pair of those wierd things attached to the side of your head ... (ears) !!!. To the "unsure" ... pleeeeeeeeeeeeeeese read this ... <http://www.observations.biz/Observations_from_Norway/howmuchpowerisenough.h…> 73 John. <la2qaa(a)amsat.org>

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Southern Californians - Events!
by Clint Bradford 03 Sep '07

03 Sep '07

Don’t forget to support HAMCON in Torrance September 7-9, and the Amateur Radio Expo weekends during the Los Angeles County Fair this month! AMSAT has a booth at HAMCON - stop by and say hello. In addition, I’ll be presenting “Working AO-51 with your HT” at the Long Beach Amateur Radio Club meeting on Friday night at 7pm at the conference hotel. If you're available, I would welcome your experienced comments and critiques on the presentation. It is aimed (obviously) as those new to amateur satellites... Additionally, AMSAT wll have a booth at the LA Co. Fair in the Amateur Radio Expo! I need more volunteers for the AMSAT booth, and we also need amateurs to assist with the rest of our 300' total of amateur radio booth space! The Amateur Radio Expo runs Fri-Sun throughout the fair. OF COURSE I have parking passes and tickets for those helping with the AMSAT booth! Here is the tentative schedule for the AMSAT booth: 09/07 - Fair opening to lunch - AMSAT 09/08 - All day - AMSAT 09/09 - Minimum 2nd half of day - AMSAT, to closing 09/14 - TBD 09/15 - All day - AMSAT 09/16 - Minimum 2nd half of day - AMSAT, to closing 09/21 - TBD 09/22 - TBD 09/23 - All day - AMSAT 09/28 - NOT AVAILABLE 09/29 - NOT AVAILABLE 09/30 - All day - AMSAT Email me asap for additional details. http://www.hamcon.org http://www.amateurradioexpo.org Clint Bradford, K6LCS AMSAT Area Coordinator 909-241-7666

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AO-7, frequencies
by Dave Guimont 03 Sep '07

03 Sep '07

I don't remember who asked the question, but I got on AO7 tonite ~1255z 3 sep 07 to ascertain the frequencies. Someone made the comment that they were quite far from the posted. Not true....Accounting for doppler, of course, they are amazingly close to what they were when I first got on in 1980, and what they were in 2004 when it "came back to life".....I haven't been on for months so thought I would respond to his question...Nominal 432.150(lsb) up, 145.950(usb) up...... It took amazingly little power, I estimate about 3 watts , up the pipe, from my ICOM 910. (as low as I can crank the output!).... And I thank those that answered, but could not get ANY callsigns for certain, tho I heard my own callsign clearly, to confirm the frequencies, and I thank them...for their response.. BUT.....some dork running tons of power managed to overpower us at every attempt...deliberately??? or otherwise... First time I've had that happen in over 27 years of satellite operation...where do these guys come from?? 73, Dave wb6llo(a)amsat.org Disagree: I learn.... Pulling for P3E...

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