November 2009 - AMSAT-BB - mailman.amsat.org

Satellite power levels
by Andrew Rich 07 Nov '09

07 Nov '09

I am trying to gauge what power levels ham satellites use and what is the rough expected outcome. For example 100mW CW on UHF seems pretty weak, but 5 W from SO-67 seems to be pretty strong. >From reports, 5 W is HT material. I have sent 100 mW from a glider, and we got around 3 - 7 km's Maybe the birds have gain ant pointed at earth ? These cubesats, what sort of power do they run ? Andrew VK4TEC

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SO-67 over Europe thanks for test
by OZ1MY 07 Nov '09

07 Nov '09

Hi all, SO-67 worked great over Europe this morning. The downlink signal is the largest I have seen for years :-) I used FMN with mike gain turned down. That is far the best way to work the uplink. Some stations with a too wide deviation even made the downlink change amplitude - or cut it off. I used normal FM on the receive side. Worked G3VZV and IZ1ERR. Lots of other stations on. Thanks for a new satellite for us to use. 73 OZ1MY Ib

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SO-67 Recording 7Nov09 1613z
by John Papay 07 Nov '09

07 Nov '09

I have a recording of the 7 November 1613z pass over the USA/Canada/Mexico. Here's the link: http://www.papays.com/SO-67_07Nov2009_161151z.mp3 73, John K8YSE

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SO-67 pass over North America
by Kevin Groth 07 Nov '09

07 Nov '09

Ok, let's just say that pass was pretty crowded! Must have been a hundred people trying to get in. Although I didn't make a successful QSO, I was very excited to hear the bird FULL QUIET just as my LVB Tracker switched from 0 degrees to 1 degree over the horizon! Of the many stations I did hear, I heard 60db over S9 signals. I heard VA7VW, VE6EGN, VE6AB, W5ACM, K7WIN, and WD9EWK, plus a host of XE stations and others towards the end of the pass. I can't wait to get a QSO on this new satellite! Greatest hobby ever! Kevin N9EME EM12 Fort Worth, Texas, USA

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Re: SA-AMSAT payload activation on SO-67
by ps8rf Piraja 07 Nov '09

07 Nov '09

It was a success on the Sumbandilasat in South America. We are working with 10 and 20 watts and 20% of microphone gain. Thanks again to the team of controllers of SumbaSat and our friend Andre, ZS2BK. Follow the link to a part of the recording contact with Roland, PY4ZBZ. http://www.spacesat.com.br/media/SO67 South america.mp3 Please hear the audio recording made directly from Roland, PY4ZBZ:contact with PS8RF and PY5JCI. Very good recording. http://www.qsl.net/py4zbz/satelite/SO670711091145.wav I hope you enjoy it. 73 Piraja, PS8RF _________________________________________________________________ Você já ama o Messenger? Conheça ainda mais sobre ele no Novo site de Windows Live. http://www.windowslive.com.br/?ocid=WindowsLive09_MSN_Hotmail_Tagline_out09

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Tone
by Jack Barbera 07 Nov '09

07 Nov '09

Thanks everyone for the info on tone input for my 910.will install today and see what happens Jack WA1ZDV

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SA-AMSAT payload activation on SO-67
by Jan-Albert Koekemoer 07 Nov '09

07 Nov '09

Hello We intend to schedule the FM V/U cross-band repeater on Sumbandila as follows (all times in UTC; all activations 13 minutes duration): Fri 6 Nov 2009: 21:38 (Eastern Australia / New Zealand) Sa 7 Nov 2009: 02:05 (Western Asia) 08:17 (Europe) 11:40 (Eastern part of South America) 16:13 (Central Canada / USA) The CTCSS tone for the transponder is 233.6 Hz. Uplink: 145.875MHz Downlink: 435.345MHz Additional recommendations: Use only narrow FM Switch off compression Speak softly (mic gain down) Satellite characteristics: All antennas are linear vertically polarized (1/4 wavelength) Sat Tx power = 5W Sat Rx sensitivity = -116.5dBm for 12dB SINAD Max antenna gain = 4dBi Note that the satellite is currently in a controlled sun tracking mode with antennas Nadir pointing. Apologies for the late notification, but we're still in the commissioning phase and can therefore not guarantee the SA-AMSAT payload service far ahead in time. Since we're using the same (shared) transponder for TT&C purposes at present, we can unfortunately not schedule the payload over RSA on Saturday. Regards Jan-Albert (ZR1JAK) Sumbandila Ground Control Team E-mail Disclaimer http://www.sunspace.co.za/emaildisclaimer.htm

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(no subject)
by Nick Pugh K5QXJ 07 Nov '09

07 Nov '09

Hi ALL Take a look at this prototype of deployable on a 3u cube nick http://www.youtube.com/watch?v=L0ldSWgOEjU

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Live microwave lectures
by G0MRF＠aol.com 07 Nov '09

07 Nov '09

Hi All. The UK 'Martlesham microwave roundtable' has its series of lectures being screened live on the internet this Sunday. Some of these may be of interest, but obviously have a microwave theme. Speakers are G4HUP, WW2R, DL1YMK G4JNT and Kent Britain WA5VJB. Details are at: _http://mmrt.homedns.org/timetable.html_ (http://mmrt.homedns.org/timetable.html) Lectures begin at 11.02 UTC Sunday Live video can be found on Sunday at _www.batc.tv_ (http://www.batc.tv) Thanks David

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Re: SA-AMSAT payload activation on SO-67
by GW1FKY＠aol.com 07 Nov '09

07 Nov '09

Hi Jan, I heard very strong signals from Europeans on the down link - Just using my THD-7E and its helical antenna. Congratulations to all in the team and "Good Luck" for future work. Ken Eaton GW1FKY Amsat -UK Amsat NA

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