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

Re: Status on AO-16?
by Mark L. Hammond 20 May '08

20 May '08

Hi Mike, Indeed, over the last several days you are likely to have found AO-16 silent. There appears to be something in the spacecraft shutting down the transmitter after a short, random period of time. Current speculation on the problem includes a temperature issue that has reared its ugly head now that the eclipse periods are increasing and the spacecraft internal temperatures are decreasing. It may be a hardware timer. It does not appear to be a battery issue. At this point, the best we can do is to manually turn the satellite ON and then configure it for voice operations. This is a manual process and command stations are limited to the East coast of the US. As our busy schedules permit, we'll try to turn it ON; for now, it's the best we can do. Only time will tell if the current situation will stay the same, improve, or get worse. 73, Mark Hammond, N8MH AO-16 Command Station >Can anyone tell me the status of AO-16? I recall a message here that it was >having problems, but no updates or new lately that I can find. I heard nothing >on the passes I've tried over the last few days. > >Mike WB1AAT Mark L. Hammond [N8MH]

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Status on AO-16?
by Mike Ryan 20 May '08

20 May '08

Can anyone tell me the status of AO-16? I recall a message here that it was having problems, but no updates or new lately that I can find. I heard nothing on the passes I've tried over the last few days. Mike WB1AAT

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Delfi DO-64
by G0MRF＠aol.com 19 May '08

19 May '08

Excellent signals from Delfi C3 ( DO-64 ) on this evenings 21.23UTC pass here in London. No drop outs or distortion. 214 decoded packets from an IC706 with a 3 ele beam pointing at a single point in the sky without a rotator. Very nice David

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New rig ... SSB birds
by Garie Halstead K8KFJ 19 May '08

19 May '08

I just purchased a new FT-817ND and plan to use it in conjunction with my existing IC706MK2G. The plan being to perhaps work some SSB. I wondered how much operation there is right now on VO-52 for instance. So, I picked a midday pass with some excellent elevation for my activity test today. At TCA, I still had not heard anything on the new 817. That was my fear ... inactivity. I was beginning to give up when suddenly Chip (W4PBG) in FM19 calls CQ and hooks up with Don (K5BTK) IN EM42. The mode was CW. I guess that answered any question I may have had regarding activity. I hope to be on the bird soon with the new setup. Sounds as if an op could be fairly busy just dealing with the Doppler aspect while sending, copying, etc. Can someone guide me to a tutorial perhaps. Many thanks. 73, Gary -K8KFJ- West Virginia (EM98) AMSAT #32574 Sat VUCC #125

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145 MHz IF on V/s?
by K & R Yoksh 19 May '08

19 May '08

Hi all, Thanks for the replies, however, I've still not had my question answered, so I'll ask again. I'd like to hear from anyone using a 145 MHz IF when working mode V/s. Do you experience desense when operating V/s, but not other uplink modes? I'm planning to use my AIDC 3731 with 145 MHz IF when I install my dish this summer. I really want to use it for HEO operation, but it'd be a bonus if I could also work the LEOs. I could go with a 123 MHz IF unit if that'd work better. Thanks and 73, Kyle Yoksh K0KN Olathe, Kansas

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Where to send a recording regarding delfi-c3 downlink problem?
by Kostas Ioannidis 19 May '08

19 May '08

I want to send to the c3 command team a wave file i recorded at 18-5-2008 19:25 utc. I recorded the downlink becoming erratic and dropping out shortly after. Do you know the e-mail ??? 73 de sw1ixp

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AAUSAT-11
by Robert Turlington 19 May '08

19 May '08

Hi All Has anyone heard AAUSAT-11 recently and if so what keps were used?I have listened a few times but nothing heard!Regards Robert G8ATE _________________________________________________________________ All new Live Search at Live.com http://clk.atdmt.com/UKM/go/msnnkmgl0010000006ukm/direct/01/

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Re: 145 MHz IF on V/s
by Rm2642＠aol.com 19 May '08

19 May '08

I'm just being cautious with my FT 736R before I try this, so, if I use my Downeast Microwave 2400 - 144 downconverter which puts the S band downconverter downlink at around 145.2 MHz and I operate the uplink at around 145.9 MHz, this separation of 700 KHz won't blast (desense) my receiver front end or the downconverter? I'm using anywhere from 2 to 10 Watts on the uplink and SATPC32. Thanks Ron N6PAA **************Wondering what's for Dinner Tonight? Get new twists on family favorites at AOL Food. (http://food.aol.com/dinner-tonight?NCID=aolfod00030000000001)

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Delfi-C3 status update 18 May 13:00 UTC
by Wouter Jan Ubbels 19 May '08

19 May '08

Hi all, Another status update on the Delfi-C3 satellite: 1. During the 10:40 UTC pass over the Delfi-C3 groundstation on Thursday 15th of May, the linear transponder was successfully tested and activated for a short time. The CW beacon was received well and subsequently good signals using SSB were received. An audio file of the test can be found at: http://www.delfic3.nl/photoblog/wp-content/uploads/2008/05/pe4wj_transponde… 2. We are currently performing tests while the spacecraft is over our groundstation in order to address the downlink dropout issue. Since we take it step by step, the satellite may still experience downlink dropouts over the coming days. 3. TLE's for object G match best at this moment, we are becoming more and more confident that G is in fact Delfi-C3. 4. Up to this date, we have received over 130000 AX.25 frames from all over the world, thank you very much for your efforts and observations so far! 5. Delfi-C3 has been given an OSCAR number by AMSAT, and is now Also Known As DO-64, which stands for Delfi-C3 OSCAR 64 or Dutch OSCAR 64. It is a true honour for all team members to have Delfi-C3 join in the long tradition of OSCAR satellites. best 73, on behalf of the Delfi-C3 team, Wouter Jan Ubbels PE4WJ

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Cubesat report
by David 19 May '08

19 May '08

Hello All, For the 60+degree pass this morning 2008/05/18/23:25 UTC SEEDS heard in packet mode CUTE-1.7 heard and decoded Delfi DO-64 not heard on either beacon in BPSK or CW 73 de David VK5DG

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