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

Silence
by Dave Aitch 19 Dec '09

19 Dec '09

Yea another lonely pass for OSCAR 27 just now, 1600-1606 UTC Right up the middle of the Atlantic and no other calls heard. Dave G1OCN AMSAT UK 5766

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Question about vacuum and power module for linear transponder
by William Leijenaar 19 Dec '09

19 Dec '09

Hi AMSATs, After many work on my transponder design I decided to put some work in extending my lab. One of the things I liked to have is a vacuum test chamber, to test electronics under vacuum conditions. I have looked around and I see all kind of classes of vacuum pumps, and their equal increasing price. My question is how deep the vacuum has to be to be able to do a valide test on (space) electronics working under space vacuum conditions ? I also would like to know if anyone has experience in SSB mode with the new power modules types from Mitsubishi. Like the RA60H1317M, which can give 60W power on 2m with only 50mW input power. I am looking for some PA behind my LE005-R2 transponder design, to get a small sized high-power linear transponder. The transponder gives 200mW PEP, so the 50mW is no problem at all.I just wonder how linear these Mitsubishi modules are, when using in linear mode. In the datasheet it says that they 'may älso be used for linear mouldation", which doesn't give many guarenty. Any experience with these modules in linear (SSB) mode are welcome. 73 de PE1RAH, William Leijenaar For my small mode-uv transponder design, please check: www.leijenaarelectronics.nl --- Send instant messages to your online friends http://uk.messenger.yahoo.com

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Do not hear RS-22 ?!?!
by Jean-François Ménard 19 Dec '09

19 Dec '09

Hi, This is the second time that I tried to listen to RS-22... but nothing heard over eastern Canada. I tried the 13h50 UTC pass... nothing !?!?! Any body out there have the same problem !?!? 73 -- Jean-François Ménard VA2SS =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= AMSAT www.amsat.org / Member #37102 ARRL www.arrl.org =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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amsat-bb] XW-1 heard with a rubber duck
by Brugnera Ivo 19 Dec '09

19 Dec '09

Hi Gordon, the signal SSB CW listened with your kenwood, and' that related to the Telemetria of the new Chinese satellite XW-1. To confirmation the decoding of the CW with signals groups TTT of 3 characters. You increase explanations on my site: http://www.hamradio.selfip.com/i6ibe/xw1/xw1.htm bye IVO I6IBE ----------------------------------------------------------------- Ivo Brugnera I6IBE - Pratola Peligna (Aq) Italy Web Site: http://www.webalice.it/brugneraivo/

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XW-1 BBS uplink
by Mineo Wakita 19 Dec '09

19 Dec '09

I succeeded in uplink to BBS digital store-forward transponder. There are many confusions between FM transponder and Digital BBS. Therefore the file upload to the BBS was not completed. Because it influence by the living together of FM and Digital BBS each other, this use feels like being difficult. http://www.ne.jp/asahi/hamradio/je9pel/91219xw2.jpg JE9PEL Mineo Wakita

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XW-1 heard with a rubber duck
by gordonjcp＠gjcp.net 19 Dec '09

19 Dec '09

About 12:25 today I went outside with my TH-F7E handie, and stuck in the frequency. A bit of tuning around and I had noisy but clear CW on 435.780 - quite far down in the noise but a good easy copy. I didn't write down exactly what was sent but the TTT TTT TTT groups were instantly recognisable. Gordon MM0YEQ

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XW-1 Schedule on Dec 19 Renew
by Alan Kung 19 Dec '09

19 Dec '09

XW-1 FM and digital store-forward transponder will work on Dec. 19 at On: 0124UTC Off: 0143UTC On: 1146UTC Off: 1206UTC 73 Alan Kung, BA1DU XW-1 Project Manager

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XW-1 Official site
by Michael Chen 19 Dec '09

19 Dec '09

All, The official site for XW-1 and AMSAT-China is now http://www.camsat.cn Please update your browser's bookmark. This site supports both Chinese (Default) and English. Language can be detected by browser configuration or by user selection. More language support is under development, volunteers wanted. Contact me if you wish to help. Michael Chen, BD5RV/4 Email: michael.bd5rv(a)gmail.com MSN: bd5rv(a)jsdxc.org Skype: michael-bd5rv

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Re: XW-1 FM voice no work over Australia
by vk5alx＠amsat.org 19 Dec '09

19 Dec '09

>There is no carrier on the repeater until somebody turn on his uplink with 67Hz >PL, or transponder will transmit PACSAT UI frame per 12 second if uplink is >idless. > >73 >Alan, BA1DU That may be how it should be but I can assure you the carrier was on continuously during the time I reported in my original post (1331-1341 UTC) and it did not respond to my input signal. I believe others have reported the same. Alex VK5ALX

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XW-1 FM voice no work over Australia
by ryan woods 19 Dec '09

19 Dec '09

I also heard the beacon very well here in FM09 on my d700 with a mag-mount in the car but I didnt hear the carrier or anything on the repeater. Lets hope all is well with our new sat. Ryan Woods KD8ATF FM09om

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