August 2010 - AMSAT-BB - mailman.amsat.org

Flights to Chicago for AMSAT Symposium
by Martha 18 Aug '10

18 Aug '10

For those in the greater Washington Area: Round trip (non-stop) from National Airport to O'Hare on American Airlines is $219. That includes fees and taxes. -- 73- Martha

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Hudson Valley Satcom Group Net Thursday Aug.19 At 8 PM EST On Echolink N2EYH-L
by Cotejaune2＠aol.com 18 Aug '10

18 Aug '10

Hello again everyone. It's time again for the HVSG Net on Thursday August 19 at 8 PM EST on N2EYH-L Echolink and on the MT Beacon repeater 146.970 pl 100. Please join us for the net. I would like to thank all of you who listened in on Echolink for the last net. Hope to hear you there. 73 Gary/WA2AQH

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looking for information on amplifiers from Watkin-Johnson
by Matthias Bopp 18 Aug '10

18 Aug '10

Hello, I am looking for any information on the following amplifiers: 1.) Watkin-Johnson WJ-6615-512 P1 (GaAs FET Amplifier), frequency range marked on encasing is 1.0-2.6 GHz 2.) Watkin-Johnson WJ-738-3 (Low Noise Solid State Amplifier), frequency range marked on encasing is 0.5-1.0 GHz Both amplifiers have 110V AC power supplies attached to them. As I live in Germany and we have 220V mains I would like to modify them and operate them from a DC voltage. However I do not know the needed DC supply voltage nor the necessary polarity. Any information is highly appreciated, especially a data sheet. Many thanks in advance for any help and best 55&73 from Germany Matthias www.dd1us.de <http://www.dd1us.de/>

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AO-51 update 18 August 2010 Re: AO-51 Down
by Mark L. Hammond 18 Aug '10

18 Aug '10

Rick, Thanks for your note--it's not really down. Please refer to: http://oscar.dcarr.org/ I had intended to do a more complete update later, but here's the quick version. 1) AO-51 is still in eclipses for the next 4-5 days. Soon we'll be back in 100% sun (until the end of December.) That means within the next several days we should be able to keep AO-51 transmitting all the time. In fact, we'll need to in order to keep temperatures down! 2) In recent days I've had to resort to shutting down the voice repeater in order to grab some telemetry files from the bird. This is very important as we are nearing the end of the eclipse period and we want some good data for current use and for future reference. We keep the voice repeater shutdowns to a minimum and try to do it during the AM passes over the eastern US. But they are necessary at this time. Sorry for any inconvenience. 3) Currently AO-51 has been automatically turning itself OFF and back ON because of the power budget. You'll see this more often as it first comes out of eclipse and as it begins to enter eclipse. We continue to fine tune this, but our goal is to keep it transmitting when there is enough power--without having the bird shutdown until manually commanded back ON by one of the command team members. 4) Come January, we won't see much of a break from the eclipse periods for a long, long time (there is one short window of full sun, but it's about 2 weeks long in late Feb/early March 2011). The command team has been using the recent eclipse period to learn how to become more efficient in the use of the power management code on board. This allows us to get the most "bang for the buck" out of the available power. It's pretty complex and versatile. We've learned a tremendous amount this eclipse period, but still have more to learn in the future. And there will be a future for AO-51 :) I hope that helps to reassure you...that is my goal! 73, Mark N8MH AO-51 Command Team member On Wed, Aug 18, 2010 at 8:19 AM, Rick - WA4NVM <wa4nvm(a)comcast.net> wrote: > GM All, > > I haven't seen any post about AO-51 shutting down during it's last pass. We all hope > it's a fast fix. Good luck to the control team. > > 73 all, > > Rick WA4NVM > _______________________________________________ > 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 > -- Mark L. Hammond [N8MH]

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Re: AO-51 Down
by Dave Webb KB1PVH 18 Aug '10

18 Aug '10

I did lose it on the 09:34 UTC pass this morning, just thought the cable for the Elk finally failed. Dave - KB1PVH Sent from my Verizon Wireless DROID On Aug 18, 2010 8:33 AM, "Rick - WA4NVM" <wa4nvm(a)comcast.net> wrote: GM All, I haven't seen any post about AO-51 shutting down during it's last pass. We all hope it's a fast fix. Good luck to the control team. 73 all, Rick WA4NVM _______________________________________________ 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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AO-51 Down
by Rick - WA4NVM 18 Aug '10

18 Aug '10

GM All, I haven't seen any post about AO-51 shutting down during it's last pass. We all hope it's a fast fix. Good luck to the control team. 73 all, Rick WA4NVM

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AMSATers are Awesome!
by Clint Bradford 18 Aug '10

18 Aug '10

THANK YOU to you folks who made this evening's demo in El Segundo DM03 nothing short of fantastic for my audience! Although the temp was 20 degrees cooler in El Segundo than it was in my own Riverside, our meeting place was a two-story building. So it was best to leave the assemblage in the shade, while I initiated reception of AO-51. As I detected quieting, I looked up at the 30+ in the group, and announced - "Now is the time to start walkin' towards the guy in the Hawaiian shirt and weird antenna ... " (grin) We worked South Dakota ... Lake Tahoe ... a couple of units in the San Francisco region, northern California ... YOU know who you are. I do not record these - too geeky even for me (grin 2). As soon as we finished the pass, we walked into the El Segundo PD's EOC for my presentation. The room was full of about 35 attendees. THANKS AGAIN, AMSAT MEMBERS. My physician has told me to watch my blood pressure ... but I still get excited by all of this. Clint, K6LCS http://www.work-sat.com 909-241-7666

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Expanding Radio AMSAT's to include telescope.
by Keith Sloan 18 Aug '10

18 Aug '10

Is there any reason why a future Amatuer Radio Satellite could not include a small telescope and CCD imaging. Would seem to me to be more productive and useful than just exchanging contact details. After all there are Weather Satellites. Thanks Keith Sloan 2E0VBN

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AO-51 Demo 08/18 0544GMT / 5:44PM PDT
by Clint Bradford 17 Aug '10

17 Aug '10

Hope to work you on AO-51 this afternoon, 5:44PM PDT, from a demo and presentation to three El Segundo, CA-area clubs! Clint, K6LCS http://www.work-sat.com

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Hawaii - YES!
by Bob Herrell 17 Aug '10

17 Aug '10

I would like to thank Robert, NH7WN, for my last state for WAS - Satellite. We worked at 18:27Z today on HO-68. I would also like to thanks all those that emailed me with suggestions for the contact. 73, Bob Herrell - AJ5C EM36 Arkansas AMSAT #36645 __________ Information from ESET Smart Security, version of virus signature database 5374 (20100817) __________ The message was checked by ESET Smart Security. http://www.eset.com

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