September 2006 - AMSAT-BB - mailman.amsat.org

LVB tracker, USB interface boards on eBay.
by jules＠g0nzo.co.uk 12 Sep '06

12 Sep '06

All I have just seen these items. The look to be the modules that Howard designed his LVB tracker board to accept. Will give your LVB tracker an on-board USB interface. http://cgi.ebay.co.uk/USB-Serial-interface-module_W0QQitemZ160009996603QQih… Jules

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Eagle-S
by WILLIAMS MICHAEL 12 Sep '06

12 Sep '06

I'm waiting for AMSAT-DL to announce it's abandoning P3E's S-band downlink system based on AMSAT-NA's recent data. It would put an end to this. Nobody seems to put my 5 GHz phones back in their chargers when done. Mike K9QHO AMSAT 33589

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(no subject)
by David J 12 Sep '06

12 Sep '06

The Florida AMSAT Net will meet this Thursday evening at the usual time of 19:30 ET, 23:30 UTC on the West Florida Group Ni4CE repeater system, the Orlando N4HHA repeater at 443.1 MHz, 103.5Hz tone, the N4LEM Cocoa repeater, 147.36 MHz +107.2 PL or connect by echolink to KG4YZY-R. The net's purpose is to provide a platform for hams with amateur satellite interest to meet and discuss topics of interest. All amateurs are invited to check in. Dave, AA4KN

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Re: 10mtr and Galileo
by Miroslav Kasal 12 Sep '06

12 Sep '06

Hi Domenico et al., You are right. Centers of the analog pass-bands are: L1 = 1268.800 MHz L2 = 1263.300 MHz Pass-bands are +/- 75kHz around these frequencies. 73, Mirek OK2AQK Date: Mon, 11 Sep 2006 16:29:18 +0200 From: "i8cvs" <domenico.i8cvs(a)tin.it> Subject: [amsat-bb] Re: 10mtr and Galileo To: "Miroslav Kasal" <kasal(a)feec.vutbr.cz>, "AMSAT-BB" <amsat-bb(a)amsat.org> Message-ID: <003a01c6d5ae$ab684140$0201a8c0(a)tin.it> Content-Type: text/plain; charset="iso-8859-1" Hi Mirek, OK2AQK Tank you for this information and so as already published by AMSAT-DL in the following document http://www.amsat-dl.org/pic/gallery2/main.php?g2_view=core.DownloadItem&g2_i temId=6497 For the linear mode the uplink L1 will use 1268.725 to 1268.875 MHz while the Galileo Alternative L2 will use 1263.225 to 1263.375 MHz Please confirm. Best 73" de i8CVS Domenico

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Re: 10m band kibitzing
by jari.koivurinne＠mail.htk.fi 12 Sep '06

12 Sep '06

>Hi AMSATs, > >I like to give my comment on the message of N6GHZ. >As far as I know there will be a 29MHz receiver on >P3e. >Maybe things have changed but at the last designer >meeting in Marburg, where I showed my MODE-UV >prototype it was discussed. > >At that time the 29MHz receiver was a task of the >Finish group. However this group was very busy with >other parts of the satellite and 29MHz was on low >priority. Another problem was the physical space, and >it was agreed that is should join a small space in the >MODE-UV box. > >73 >William >--- Early P3E-plan had the 10m band receiver and an engineering model was made by Janne OH1LRY. I designed and made a matching diplexer to use simultaneously the L-band receiving helix as a 10m short whip antenna. I modeled the helix tuning unit with some excessive field test. However the commission dropped the 10m RX to save space and make the concept not so complex. Also there was discussion about poor link budget and maybe the L-band helix antenna have to change to other type that made the things uncertain. Besides the short L-band helix was not really good antenna on 10m ;-P So there is no 10m RX aboard. We are having hard times to fit all parts inside that satellite. Space is a bit tight and almost all components must be SMD. At least in our 05E-module size 22x34x3.3cm (8.6x13.3x1.2 inch) which contains S-band receiver, X-band transmitter, switching power supplies, Linear-IF processors, Coherent ranging processor and all control circuits. But now we have some spare parts to build a simple small satellite! -jari oh3uw ----------------------------- VIRPI - http://virpi.net -----------------------------

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L band gain
by w7lrd＠comcast.net 12 Sep '06

12 Sep '06

Hello My lesson in humility is over. I need more gain/power. If I put a 5 1/2 turn helix in front of a 36x30 primestar dish how much gain would that give me on 1.268 Ghz ? My current antenna is a directive systems DSH23-12 (12 turn helix) and is given as 14.5 dBic. 73 Bob W7LRD Seattle

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FIRST L/S ATTEMPT
by w7lrd＠comcast.net 12 Sep '06

12 Sep '06

Hello Bob will be making his first L/S attempt on AO51 this evening on orbit #11568 (not sure I have that correct). It's the orbit that goes right (South to North) up the middle of the country. I have an IC-1271A running 10 watts through 50 feet of LMR400 to a 12 turn helix. S band is a 3 foot primestar/helix feed/3731 d/c. Looking for contacts and/or reception results. I may need a larger antenna, I have a 3 foot, a 4 foot and 12TVRO dish that are "waiting" for something. This is really a kick! 73 Bob W7LRD Seattle

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First L/S QSO!!
by w7lrd＠comcast.net 12 Sep '06

12 Sep '06

I worked AK5V for my first L/S effort. Though several others did not hear me or said "you're too weak om". Clearly I have some work to do. What is the recommeded erp for AO51 L band?? My little 10W through 50 feet of coax to a 12 turn helix is just not cutting it. In planning for the next HEO I will have to make improvements. What are you L'ers using? I will be on the next pass. 73 Bob W7LRD Seattle

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Symposium Registration Reminder
by Emily Clarke 12 Sep '06

12 Sep '06

Just a reminder that if you are going to register for the Symposium it will be a good idea to do it on or before September 15th. On September 16th the price increases from $45 to $55. 73, Emily --------------------------------- N1DID formerly W0EEC - CM87tm Support Project OSCAR - http://www.projectoscar.net

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H-IIA F10 launch successful
by Mineo Wakita 12 Sep '06

12 Sep '06

H-IIA/F10 was successful in the launch at 04:35 UTC 11Sep06. http://www.jaxa.jp/missions/projects/rockets/h2a/index_e.html --------------------------------------------- Name: Mineo Wakita / JE9PEL, JAMSAT member Mail: ei7m-wkt(a)asahi-net.or.jp URL : http://www.ne.jp/asahi/hamradio/je9pel/ QTH : Yokohama Japan, GL:pm95tj Date: Sep 12, 2006 ---------------------------------------------

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