October 2007 - AMSAT-BB - mailman.amsat.org

GB5OSO works NA at last
by Robert Turlington 08 Oct '07

08 Oct '07

Hi All GB5OSO has worked NA at last,I managed to work Jim VE1ZM at the start of an East bound pass of SO50 at 1402utc this afternoon after trying on AO51 and VO52 just need a few more of you to come up nowRegards Robert G8ATE _________________________________________________________________ The next generation of MSN Hotmail has arrived - Windows Live Hotmail http://www.newhotmail.co.uk

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ex JA1ANG Harry Yoneda Silent Key
by Tak Okamoto 08 Oct '07

08 Oct '07

It is with deep sadness that I must report the passing of ex JA1ANG Harry Yoneda. Harry was a founding member of JAMSAT (Japan AMSAT) and he also served on the AMSAT Board of Directors. Harry passed away this morning, Monday October 8, due to pneumonia. He was 88. Funeral service at Setagaya Heian Church, 2-41-5 Shimouma, Setagaya-ku, Tokyo 154-0002 Japan, Phone +81-3-3421-4993 Fax +81-3-3421-4084 at 14:00JST (05:00UTC), Wednesday, October 10. If you wish to express your condolences to his family, please email them to me. I will forward them. 73, Tak Okamoto, JA2PKI JAMSAT

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Landwehr 2m Preamp Help/Info & Manual Request
by Douglas C. Papay 08 Oct '07

08 Oct '07

I recently obtained a Landwehr 2m preamp which I plan to use for AO-7 operation. The preamp did not come with any significant documentation besides what is printed on the cover (and thats a bit faded). The preamp appears to be functional, except that it has a tendency to switch back and forth between RX and TX by itself (when no RF is present and the PTT is not connected). This has made the preamp unusable. Does anyone have experience with this preamp and/or know how this issue can be resolved? I am looking for any suggestions as well as any documentation (manual/schematic) for this preamp that you might have. Your help is appreciated. Thanks & 73, Doug, KD8CAO

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Question about doppler correction software
by Scott Wilson 08 Oct '07

08 Oct '07

I have a question regarding software doppler correction - in particular when using linear satellites. I am working on some control software that is a little more flexible than what I've used. I really like SatPC32 on Windows and Predict/gsat on Linux. I haven't yet fallen in love with any available software, but that's really a different story. I can imagine that doppler correction for an FM sat is rather easy in that you simply tune the transmitter/receiver to the published frequencies depending on the operating mode. I'm a little less sure how that would work for a linear satellite. As mentioned before, I do have a chart from AMSAT that lists channelized frequencies for them. If I can tune the transmitter such that the frequency at the satellite is one of the listed frequencies, how sure can I be that the receive is as published? Can I extend that to the point where I would be able to automatically determine frequencies (at the satellite) of the downlink for a given uplink and then compute doppler from there? It would then be fairly convenient to tune within the satellite's passband and let the computer do the 'thinking'. Thanks for any feedback. Scott NW2S

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Re: AO51 L/U BB
by Mark L. Hammond 08 Oct '07

08 Oct '07

Hi Bruce, It looks like you need to change your Wisp settings for AO-51--both the Broadcast Callsign and BBS Callsign values need to be PECHO-11. That will fix your "frames heard" issue, and you should get some BB data. I haven't been able to get into the BBS on L band yet either; I have about 1 watt at the antenna (20 turn helix) and with trees, etc. it apparently hasn't been enough. I saw both WA4SXM and KO4MA in the queue, so it appears to be working. We have reports of a few others' success, too. You might do as I am--keep trying :) A lack of success has caused me to browse around for a 1.2GHz amplifier; I see Down East Microwave carries nice amps; wonder where else somebody might suggest looking? 73, Mark N8MH >Date: Sun, 7 Oct 2007 20:54:48 -0400 >From: "Cox" <snyderb(a)cox.net> >Subject: [amsat-bb] AO51 L/U BB >To: "Amsat-bb" <amsat-bb(a)amsat.org> >Message-ID: <000701c80945$d3ea4c00$6701a8c0(a)mshome.net> >Content-Type: text/plain; charset="iso-8859-1" > >BB > > During the AO51 pass tonight most of the Wisp D/L data showed, frames >heard PECHO-11. When it was just north of my grid, FM16vt, KO4MA was able to >get into the queue but no others including my station. > >73 Bruce KG4YEV Mark L. Hammond [N8MH]

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Re: Mode-C ?
by John Hackett 08 Oct '07

08 Oct '07

Mak, You're absolutely right ... the satellite *DID* start in mode-C but changed to mode-B when it came further into the sunlight ... the satellite has been running along the grey line at certain times on certain passes ... not really in eclipse and not completely in sunlight. This of course affects the transponder. I *PURPOSELY* made my own entries as mode-B yesterday so as not to completely confuse the newcomer in case he or she has been reading some of the comments on the various pages regarding AO-7 eclipse and modes information. To understand what is going on with AO-7 one has to read the *ENTIRE* history ... and most people don't do that ... they just assume that if "Joe Bloggs" says it's so and so ... it *MUST* be true ... (which it more often than not isn't!). 73 John. <amsat.org> AO-7 Resource Page Admin: Homepage: <http://www.observations.biz> From: sv1bsx(a)yahoo.gr To: la2qaa(a)amsat.org Subject: Fw: Mode-C ? Date: Sun, 7 Oct 2007 21:23:10 +0300 John, forget it. I have already corrected it to Mode-B. It should be very big puzzle if we starting Mode-B & C. BTW Mika he didn't entry me on Log, I don't know why, the QSO was completed... I deleted also him ! However also the next pass was very weak. Difficult to copy myself on CW. 73, Mak ----- Original Message ----- From: SV1BSX To: LA2QAA Sent: Sunday, October 07, 2007 20:11 Subject: Mode-C ? Hi John, today afternoon during the usual AO-7's "good" pass for me, over W.Asia - E.Europe, I was wondering where is the Satellite! Nothing till 25 deg. Elevation, but after a carefully listening on Downlink I heard my CQ-CQ signal, very-very weak. After 2-3 mins, Mika OH8MBN he answered me. For first time it was difficult to copy both signals (Mika's and mine). A very strange ECHO also took place, it was also very difficult the Zero-Beat. BTW I didn't hear any other on this pass. If my receiver and my antenna are both in good shape, I wonder: was it "Mode-C" ? My entry in Emily's LOg is as Mode-C. If I am wrong, please correct it. 73, Mak Email: sv1bsx(a)yahoo.gr URL : http://sv1bsx.50webs.com avast! Antivirus: Outbound message clean. Virus Database (VPS): 000778-4, 10/05/2007 Tested on: 10/7/2007 21:23:21 avast! - copyright (c) 1988-2007 ALWIL Software.

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(no subject)
by Sion Chow Q. C. (9W2QC) 08 Oct '07

08 Oct '07

Dear All, We copied the following telemetry from NO-44 during the 08 October, 0657 Hours UTC over West Malaysia. Maximum elevation was 44 degrees. Fm PCSAT-11 To BEACON Via SGATE <UI pid=F0 Len=42 >[15:07:46] T#001,078,047,046,100,214,11111111,0000,1 Fm W3ADO-1 To BEACON Via SGATE <UI pid=F0 Len=42 >[15:08:46] T#004,162,162,045,208,213,11111111,0011,1 Just thought that I will post it out, in case it will be useful to some parties. 73, Sion Chow Q. C., 9W2QC. Operating 9M2RPN

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NO-44 Telemetry
by 9w2qc＠9w2qc.net 08 Oct '07

08 Oct '07

Dear All, We copied the following telemetry from NO-44 during the 08 October, 0657 Hours UTC over West Malaysia. Maximum elevation was 44 degrees. Fm PCSAT-11 To BEACON Via SGATE <UI pid=F0 Len=42 >[15:07:46] T#001,078,047,046,100,214,11111111,0000,1 Fm W3ADO-1 To BEACON Via SGATE <UI pid=F0 Len=42 >[15:08:46] T#004,162,162,045,208,213,11111111,0011,1 Just thought that I will post it out, in case it will be useful to some parties. 73, Sion Chow Q. C., 9W2QC. Operating 9M2RPN

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AO51 L/U BB
by Cox 07 Oct '07

07 Oct '07

BB During the AO51 pass tonight most of the Wisp D/L data showed, frames heard PECHO-11. When it was just north of my grid, FM16vt, KO4MA was able to get into the queue but no others including my station. 73 Bruce KG4YEV

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Strange 9k6 packets?
by andy thomas 07 Oct '07

07 Oct '07

Hi, I've picked up the following on 9k6 here at IO92NL - qrg set at 435.23 main band but the sub band freq is 145.825. GO-32 not overhead at the time according to sts+ and latest keps. 6 October Fm X0N-2 To K-6 Via ,-7* <I R0 S0 pid=0>[23:25:47] 7 October Fm -10 To -14 <I R4 S6 pid=39 [DAMA] [EAX25] Len=3 >[10:07:00] f2} Fm ZJ To y Via S-7,M-6* <I R0 S0 pid=0 [DAMA] [EAX25]>[19:03:10] Ande-1 overhead and detected on sub band at this time. (19:03 utc) but not on others. Rig is ICOM IC910H with WIMO helix for 70cm fixed in azimuth about 230 degrees, elevation about 60 degrees. TNC is SYMEK TNC2H, newly installed. Plugged into the main abnd. Driven by AGWPE and UISS. DCD flickering on later pass of GO-32 after 19:03 utc packet, but no data. Anyone any ideas? 73 de andy G0SFJ ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/

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