December 2008 - AMSAT-BB - mailman.amsat.org

SSTV Active
by David Barber 02 Dec '08

02 Dec '08

SSTV active during 14.30utc European pass. Looks as if batteries on VC-H1 may be discharged. No picture just blue background and NA1SS callsign. David G8OQW

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ARISS and Echolink
by Scott McKee 02 Dec '08

02 Dec '08

We have a scheduled ARISS school for next Tuesday, 09 December and would like to do an Echolink feed. I would appreciate any comments from those that have done so for this event. My concern in feeding the audio from a professional mixer into the PC line input. Any special experiences or suggestions would be great. 73, Scott, NT5SM Trustee: Austin Elementary Radio Club - K5AUS

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ICOM IC-910 Owners, HELP
by Dave Guimont 02 Dec '08

02 Dec '08

I've misplaced my IC-910 manual, and I need pin numbers for the 8 pin ICC-1 to connect my radio to my computer sound card so I can use MixW. I can read the pin numbers. One of them must be ground, and the other pin number for output to the sound card... 73, Dave, WB6LLO dguimon1(a)san.rr.com Disagree: I learn.... Pulling for P3E...

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2.4Ghz up converter
by w7lrd＠comcast.net 02 Dec '08

02 Dec '08

Hello I am looking for an up-converter to 2.4Ghz from 2 meters preferably. I only need less than one watt for testing purposes. Should anyone have one they would care to part with or a recommended one, please let me know. Any information or recommendations are appreciated. I will be adjusting antennas with a Bird 43 meter and a 250Mw slug. As always thankyou in advance. -- 73 Bob W7LRD AMSAT member 28498 Seattle (AO-7 regular)

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ISS SSTV
by David Barber 02 Dec '08

02 Dec '08

Could someone ask the guy's up there to turn the camera round for some internal shots when over Europe in the dark please? Thanks. David G8OQW

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Wanted: UHF Amplifier
by K & R Yoksh 02 Dec '08

02 Dec '08

Hello, I may be in the market for a UHF power amplifier. Please reply off-list to my email: k0kn at amsat dot org with make and model, specs, condition, and particularly price. My satellite setup now is capable of 5 to 20w output on UHF. I'm thinking that a 100w amplifier would meet my needs. Thanks.. 73. Kyle K0KN

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Satellite Computer Logging Program Help
by Keith N4ZQ 02 Dec '08

02 Dec '08

Can anyone recommend a computer logging program that will read BOTH VFO's and input them into the correct columns of the logging program. My Logger32 program doesn't seem to be able to do that in either Sat Mode or plain old Split Mode for my Yaesu FT-847. It only reads the main VFO, which is the RX Frequency in the default Sat Mode. Hoping to find a logging program that won't require me to edit each and every Sat QSO after the fact. Keith N4ZQ ____________________________________________________________ Domain Registration - Click Here http://thirdpartyoffers.netzero.net/TGL2241/fc/PnY6rx9SmzOpamaGvq4HuWBy4STM…

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Re: [Mep-dev] Re: Re: BBsat Call for ideas
by Robert Bruninga 02 Dec '08

02 Dec '08

> Okay,... What would be necessary to > start/construct a ground station access > point to route satellite images/data/ > telemetry to the internet?... > Is that something desirable? Yes! The following addressess the AX.25 packet downlinks: If you look at a pass over the USA, it might only take 4 good OSCAR class ground stations in the four corners of the USA to provide pretty good coverage of all passes of all satellties... BUT, tracking horizon-to-horizon requires beam antennas, tracking and computer control plus doppler. Yes, this needs pretty good automated "full OSCAR class" stations. *However*, what we have been pushing for years is to simplify this down to a simple receiver and OMNI vertical antenna so that more people can contribute, and fewer stations have to wear out their tracking systems and moving parts and all of that complexity. With an OMNI vertical, there are all kinds of advantages: 1) No moving parts 2) No Tracking 3) No Doppler tuning (U only hear the center of pass) 4) No tower needed (doesn't need to see horizon) 5) No Beams, no elevation, no Azimuth concerns 6) Short coax and no pre-amp required usually 7) You still get "10+ dB gain" to the satellite! 8) Any Radio, and any TNC connected to any APRS client software can then become just a permanent satgate 24/7/365 with no wear-and-tear The reason this works is that the Vertical Antenna is only concerned with gain above 30 degrees and does not have to have the high-gain antenna required to work the horizon where the satellites are 6 to 10 dB weaker. A 19.5" vertical 3/4 wave whip antenna over a ground plane at roof or even backyard level that only needs to see the sky above 30 degrees will give you almost 7 dB gain at all angles over about 25 to 30 degrees and can usually get to the shack with less than 20' of coax. Plus the satellite is 6 to 10 dB closer, so in effect you will hear satellites (above 30 degrees) just as good as the OSCAR class stations (do at the horizon). The downside that compensates for all these advantages is the fact that LEO satellites are only above 25 degrees or so less than 25% of the time. BUT, WE COMPENSATE for that by getting MORE volunteer ground stations. But this is EASIER because all it takes is a radio, a TNC, and a non-tower mounted vertical whip (19" over a ground plane gives good gain on 2 meters and almost 7 dBi gain on UHF above 25 degrees). This is why we invite all small packet-relay satellites to share our 145.825 MHz downlink (after coordination via the IARU of course). The more ground stations, the better reliability, and the the more satellites, the better continuity for packet mobiles and portables. These omni-SATgates all feed into the global APRS system which feeds many live internet sites and also anyone who wants to mine the downlink via a telnet connection. Each ground station only needs to capture a few packets when it is under the satellite, the other dozens of ground stations collect the packets over other areas, and the continuous stream going into the internet is available to all (with all dupes eliminated). That's what feeds these web sites: http://www.ariss.net for the ISS downlink http://pcsat.aprs.org for the other APRS satellites And many others such as findu.com, and oaprs.net and aprs.fi The more the merrier! Now for the upcoming 9600 baud downlink experiments by the ISS, we will need these OMNI ground stations to set their radio TNC's to 9600 baud for the duration of that experiment. Bob, Wb4APR > ----- Original Message ----- > From: "Robert Bruninga" <bruninga(a)usna.edu> > To: "'Michelle'" <w5nyv(a)yahoo.com>; "'Timothy J. Salo'" > <salo(a)saloits.com>; > <amsat-bb(a)amsat.org> > Sent: Monday, December 01, 2008 11:41 AM > Subject: [amsat-bb] Re: [Mep-dev] Re: Re: BBsat Call for ideas > > > Def: MEP = Microwave Experimentation Project > > > One of the stated intentions of MEP > > is to continue the digital ground station > > work that was begun in support of ACP. > > While MEP is intended to be deployed as a > > terrestrial system, the model is based off of ACP. > > For what it's worth... the issue of high-gain antenna pointing > among terrestrial users is being taken care of with an APRS > packet that will indicate to everyone on the net, where each > person's microwave antenna is pointing live. This can allow for > automatic antenna tracking during terrestrial ops. See > http://www.aprs.org/info/microwave-exp-proj.txt > > > We preserve the idea of a multiple access payload in the > > "groundsat", which will be a mountaintop repeater instead of > > in orbit. We are using the same bands, with the only > > difference being a shift off the satellite sub-bands. We have > > taken advantage of a greatly improved link budget by > > orienting the system to high-definition video for terrestrial > use. > > > > For satellite use, we would be able to support some number of > > voice channels, depending on the payload. > > > > We are open invitation and welcome anyone at any level who > > would like to participate. > > > > Our current phase is exploratory. We're beginning to > > transition to analyzing requirements, and then we'll design, > > implement, test and verify. > > -Michelle W5NYV > > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of > the author. > Not an AMSAT-NA member? Join now to support the amateur > satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > >

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need link to current predict source code
by Eric Fort 02 Dec '08

02 Dec '08

Where can I download the latest predict source code that will compile under centos, debian, and osx 10.4? Thanks, Eric AF6EP

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Re: Selling "free" software.
by Clint Bradford 01 Dec '08

01 Dec '08

You can contact eBay security and open a case with them for copyright infringement and/or the use of your images and text without your permission. eBay took my case last month very seriously, and it was resolved in less than three days. Clint Bradford, K6LCS

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