August 2011 - AMSAT-BB - mailman.amsat.org

Re: Hamspeak - Satspeak
by Mike Schaffer 20 Aug '11

20 Aug '11

Tom: You probably made contact with W2GSB. Here is the message he had posted on this board earlier. Hello, I will be operating, as W2GSB, from the historic Fire Island Lighthouse, FN30, for the Great South Bay Amateur Radio Club tomorrow, 8-20 and 8-21st, the first pass will be with SO-50, 16:30 U and all the subsequent FM passes. A special certificate is available, mail to W2GSB Lighthouse, PO Box 1356, West Babylon, NY 11704, thank you. Do not send envelope, club will supply. 73's Pete WB2OQQ www.massapequanyweather.com 73's Mike Schaffer KA3JAW Tampa, Florida EL87

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HamSpeak - SatSpeak
by Thomas Doyle 20 Aug '11

20 Aug '11

QST adds a Hamspeak sidebar to articles to explain some of the jargon in the article. I feel the need for a SatSpeak sidebar. Today I heard a station working an FM pileup giving his grid location as "The Lighthouse". I thought I understood the grid system but "The Lighthouse" is a new one for me. Perhaps it is another mystery word. W9KE tom LM 0875

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FUNcube received ARISSAT stereo I/Q recording for SDR
by Bernard f6bvp 20 Aug '11

20 Aug '11

Hello, This was a "proof of concept" i.e. recording under Linux with Audacity, ARISSAT signal received with an FUNcube dongle. Signals were weak for the record was performed at the end of the night pass. wav file can be transferred on an iPad an then read with the very nice application iSDR. I will try to do a better recording next time. The 14MB file can be downloaded from : http://f6bvp.free.fr/videos/Audacity_FCD_41000_Stereo_16bits_19_08_11_1930U… 73 de Bernard, f6bvp

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ARISSat-1 TLM
by Nader Omer 20 Aug '11

20 Aug '11

HI UTC 13:32 - 13:43 . Orbit # 253. Good signal the entire pass. The spacecraft in High Power Mode. MET was 2666. 58 frames grabbed and forwarded. 73’s Nader

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Fwd: ARISSAT heard on FUNcube Dongle - I/Q wav file read with iSDR on iPad
by Bernard Pidouxx 20 Aug '11

20 Aug '11

> > Hello, > > Last night Aug 19, I captured ARISSAT VHF transmission using FCD and Audacity audio software to save I/Q wide band signal on my Mandriva Linux system. > I monitored the signals using quisk. Doppler shift was not too fast at the end of a nearly overhead pass in Paris. > For this first attempt I could note manage to listen ARISSAT and save the signal simultaneously. > At the end of the pass, ARISSAT was very week but I decided to record the FCD output blindly. > I saved stereo .wav file with 44100 samples per seconds for compatibility with iPad iSDR application. I could then play back recorded file with iSDR. Despite the faint signals Waterfall display showed clearly CW and BPSK beacons and fine tuning the listening frequency through the touch screen sensitivity of the iPad application let me decode parts of CW beacon with iSDR 200 Hz filter. > > I will upload soon recorded wav file and screen capture of waterfall on my site. > > 73 de Bernard, f6bvp > > Envoyé de mon iPad > >>

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ARISSat-1 Not Heard
by Nader Omer 20 Aug '11

20 Aug '11

HI ARISSat-1 Not Heard Orbit #245 00:19 - 00:30 UTC 73 Nader st2nh

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Re: Turn off AGC when receiving BPSK-1000
by i8cvs 20 Aug '11

20 Aug '11

----- Original Message ----- From: i8cvs To: Dave Guimont Sent: Saturday, August 20, 2011 6:54 AM Subject: Re: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000 Hi Dave, WB6LLO Please look also at my article "Experimental Investigation of 2400 MHz Quadrifilar Helix Antennas" publisched on AMSAT-Journal May/June 2004 Best 73" de i8CVS Domenico Pulling for P3E... ----- Original Message ----- From: Dave Guimont To: i8cvs ; amsat-bb(a)amsat.org Sent: Friday, August 19, 2011 11:40 PM Subject: Re: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000 For additional information read http://www.w2du.com/r2ch22.pdf and look at Fig 22-7 page 10 of 20 Radiation Pattern of the 1 1/2 turn 1,25 wavelenght Quadrifilar Antennas. Tnx, Dom for that info. I received a number of requests for quadfilar information, again. Goto http://cid-1973adc8c1d3207c.skydrive.live.com/summary.aspx?sa=140581470 and see the five files starting with the pic Quad2.4gigs Be very precise with the measurements, particularly on the 435... I scaled it from the 2 meter, made a slight measuring error on the driven filar, shortened it by 1/4" and the swr went from 3 to 1 to 1.6 to 1.... And use the BEST "N" connectors and coax that you can find, the most expensive part of the antenna.... 73, Dave, WB6LLO dguimon1(a)san.rr.com Disagree: I learn.... Pulling for P3E...

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Re: AMSAT-BB Digest, Vol 6, Issue 478
by Burns Fisher 20 Aug '11

20 Aug '11

Thanks for the ideas, Mike. I am using FM for sure, and no I was never able to receive ARISSat-1 with the stock antenna in the shack. I'll certainly try removing the duplexer. And thank for the info about the roofing material. I don't have aluminum siding, but I don't know about that kind of roofing material. The roof was replaced recently, is all I can tell you at the moment. I'll also try outside. Thanks again Burns, W2BFJ ------------------- Burns: ? Make sure your receive mode for frequency 145.950 is FM on your Kenwood F6A handheld. ? Before you?upgraded with additional hardware could you receive ARISSat-1 signals using the stock antenna inside your shack? ? If you can, the next step is to?remove the Diamond 2m/70cm duplexer as it might be blocking the amplified signal from your SSB? 2m pre-amp. ? If that does not?help, then?it could be that?the satellite signal are being degraded more than 75 percent or blocked entirely by the orient strand board (OSB) radiant barrier roof sheathing which is backed with a specially designed aluminum foil. The same goes if your dwelling exterior is fabricated with aluminum siding. ? It that is the case, then your only hope is to mount the antenna outside. ? ? 73's ? Mike Schaffer KA3JAW Tampa, Florida EL87

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Official Word for the 70cm Antenna?
by Mike Schaffer 20 Aug '11

20 Aug '11

Mike Schaffer KA3JAW Tampa, Florida EL87 What is the official AMSAT/ARISSat1 team finding on the ARISSat-1 70cm quarter-wave receive antenna on the bottom of the satellite? I have not heard updated news about that since the jettison occurred. Was it the dummy load or was the dummy load taken off and the flight antenna installed to deployment while in the ISS ,but later accidentally broken off when the cosmonauts hand carried it through the Pirus hatch?

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LIGHTHOUSE WEEKEND
by Peter Portanova 20 Aug '11

20 Aug '11

Hello, I will be operating, as W2GSB, from the historic Fire Island Lighthouse, FN30, for the Great South Bay Amateur Radio Club tomorrow, 8-20 and 8-21st, the first pass will be with SO-50, 16:30 U and all the subsequent FM passes. A special certificate is available, mail to W2GSB Lighthouse, PO Box 1356, West Babylon, NY 11704, thank you. Do not send envelope, club will supply. 73's Pete WB2OQQ www.massapequanyweather.com

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