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

Newbie question about mounting Lindy's above HF Hex Beam
by Gordon Bousman 08 Dec '08

08 Dec '08

I'm beginning the construction of the 2 Meter and 70 cm EZ-Lindy antennas to get myself launched into working satellites. I'd like to mount them 3' to 5' above my HF Hex-beam in order to get them as high as possible (other mounting options such as a tripod & short mast on top of my garage do not get the Lindy's as high). I will mount the ICom 2 Meter & 70 cm pre-amps on the Lindy's as well. Does anyone see that exposing the pre-amps (or my new 910H) with as much 300-400 watts of near-field HF would be detrimental? Normally I would not operate HF and SAT at the same time however the 910H might be turned on and in receive mode during HF transmissions. Any thoughts about the wisdom (or not) of this proposed Lindy mounting? Thanks, Gordon, NW7D

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SEEDS II
by Ed Tump 08 Dec '08

08 Dec '08

Folks, I was able to receive and record some telemetry audio from SEEDS II (CO-66). I have the software now that will decode the "written" data but do not know how to process the audio. Has anyone done this before? Thank you, Ed KC9GWK

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Re: 9600 baud packet tests (ISS and PCSAT)
by ryan woods 08 Dec '08

08 Dec '08

hey bob its ok we all make mistakes i would love to try the uhf 9600 via pcsat. i have always wanted to try that from the time i have tried pcsat. it will be fun. 73 kd8atf Fort Ashby wv FM09om

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D-STAR repeater problems in Copenhagen
by OZ1MY 08 Dec '08

08 Dec '08

Hi all, During December and during the last large activity on the ISS, some of us here in Copenhagen have had problems with a D-STAR repeater on 145.7875 MHz. Do any of you have a measurement of the spectrum of the D-STAR transmissions ? The theoretic spectrum should be more than 60 dB down on 145.800 MHz,but that does not seem to be the case. Including doppler the downlink from ISS is 145.796 MHz, when it is going away from us to the East, which is the direction of the repeater :-( Personally I am just 6 km away from the repeater with no obstructions on the pass from it. To avoid flames - no I have nothing against D-STAR :-) 73 OZ1MY Ib

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ISS 9600 Success @ 10.52 UK Pass
by David Barber 08 Dec '08

08 Dec '08

I managed to get digipeated via the 9600 system during the 10.52utc UK pass. System is operating on 145.800MHz not .825 as publicised. Regards David G8OQW

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AO-7 Mode A Antenna?
by Sebastian 08 Dec '08

08 Dec '08

I have a Yaesu FT-847 which is dedicated for satellite work, so I don't have any HF antennas connected to it. I'd like to know from those on the group who are (were) using AO-7 Mode A (10 meter receive), what type of antenna you are using? I really don't want to get a directional antenna for several reasons. Also, is it possible to receive Mode A without the use of an external preamp? 73 de W4AS Sebastian

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RECHERCHE TRANSISTOR...
by Tim Goodrich 08 Dec '08

08 Dec '08

Je pense que vous trouvez des informations ici. http://forums.qrz.com/showthread.php?t=178270 Tim KC2DDS -----Original Message----- From: amsat-bb-bounces(a)amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of amsat-bb-request(a)amsat.org Sent: Monday, December 08, 2008 4:31 AM To: amsat-bb(a)amsat.org Subject: AMSAT-BB Digest, Vol 3, Issue 639 Send AMSAT-BB mailing list submissions to amsat-bb(a)amsat.org To subscribe or unsubscribe via the World Wide Web, visit http://amsat.org/mailman/listinfo/amsat-bb or, via email, send a message with subject or body 'help' to amsat-bb-request(a)amsat.org You can reach the person managing the list at amsat-bb-owner(a)amsat.org When replying, please edit your Subject line so it is more specific than "Re: Contents of AMSAT-BB digest..."

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Re: D-STAR repeater problems in Copenhagen
by G0MRF＠aol.com 08 Dec '08

08 Dec '08

Hello Ib. Interesting allocation for D-Star. -60dB at 145.800 may sound suitable, but in practice what matters is how many dB down it is at 145.800 minus one half of the bandwidth of your IF filter. Ball park......... So -4kHz of doppler and -7.5kHz for a narrow FM filter gives your receivers bandpass down to 145.7885 MHz just 10k above the D-Star Which means the two are probably going to overlap. 73 David In a message dated 07/12/2008 20:34:56 GMT Standard Time, oz1my(a)privat.dk writes: The theoretic spectrum should be more than 60 dB down on 145.800 MHz,but that does not seem to be the case. Including doppler the downlink from ISS is 145.796 MHz, when it is going away from us to the East, which is the direction of the repeater :-( Personally I am just 6 km away from the repeater with no obstructions on the pass from it.

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Re: LOTW Satellite name for ISS ?
by Karl Sandstrom 08 Dec '08

08 Dec '08

The ISS is not a satellite. Satellite is an unmanned object the receives and retransmits but the ISS is manned. When you make a contact with them, your signal is not retransmitted. It terminates at the station. Seems like the crossband repeater would be an exception but I can find no evidence that it is. Karl R. Sandstrom, K5MAN Greenwell Springs, Louisiana

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Jamaica - FK18 and FK08 possibly on sat this coming weekend
by Bill Dzurilla 08 Dec '08

08 Dec '08

Listen for me from FK18 and (less likely) FK08 on 12/12-14 Friday evening, Saturday, and Sunday morning. No promises, but I'll be there on business and will try to work a few AO-51 and SO-50 passes with an HT and Arrow antenna. 73, Bill NZ5N

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