AMSAT-BB November 2008

199 participants
327 discussions

Call for Papers--2007 ARRL/TAPR Digital Communications Conference

by Ford, Steve, WB8IMY

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

9 years, 11 months

Old AMSAT Satellite Report and ARRL Gateway newsletters online

by Bob DeVarney W1ICW

Phil, thanks for the treasures and a great trip down memory lane. I have a couple old copies of the Orbit magazine from 1982, if I scan them can you find a home for them on your hosting I am limited to only 10 megs hosting on my ISP. I find one thing amazing. 2008 we are talking about operation AO-7. 1982 they were talking about operating AO-7. I doubt many commercial satellites can say the same thing regarding lifespans. We owe a lot to the pioneers among us who blazed the trail for us. Now it's up to us follow their lead and continue to make amateur satellite operating a viable and vibrant mode of communication. "We all need to hang together, or we shall surely hang separately". Bob W1ICW

13 years, 5 months

BBsat Call for ideas

by JoAnne Maenpaa

Ok folks, Its time for some fun ... how about we design and fly our own transponder via the amsat-bb? I propose BBSat (sounds better than AdHocSat). This is a call for ideas of a single board transponder in cubesat form factor ... what can we put on a 10cm ^2 circuit board? FM, SDR, packet? Initially there are only two rules ... 1) No griping 2) This is going to be an open source project Let us know what you think right here on the -bb ... -- 73 de JoAnne K9JKM k9jkm(a)amsat.org

13 years, 6 months

Re: rotor replacement pots

by Fred A Parker

A digital encoder would be the most accurate. USdigital http://www.usdigital.com/support/glossary#glossary_opticalencoder manufactures inexpensive encoders. With these and a step servo drive in example a Gecko drive http://www.geckodrive.com/product.aspx?c=2&i=14456 one could build a rotor that would be accurate to a thousand of a degree. Fred KF0AK

13 years, 6 months

Re: MMIC for LEO preamp?

by Rod Adkins

I have built a number of DEM pre-amp kits I am fortunate enough to have the loan of a Noise measuring set - & have found that the tuning for lowest noise & highest gain are often WAY apart My input would be - if you have no way to measure noise performance, buy the ready-built preamp - I have also gone this route, & been very satisfied (usual disclaimer) Re MMICs - I have built a large number of these for various freqs & purpose, using DEM PCBs Besides the poor NF, these amps are VERY broadband, totally unsuitable for head-end preamp (IMHO <g>) Rod Adkins WI6M nr San Diego 17917 Lyons Valley Road Jamul, CA 91935 > [Original Message] > From: Curt Nixon <cptcurt(a)flash.net> > Cc: <amsat-bb(a)amsat.org> > Date: 11/26/2008 7:19:46 AM > Subject: [amsat-bb] MMIC for LEO preamp? > > SO...now I have made a few contacts on AO-51 and SO-50. Now I need to > get better ears. > > I have a very simple mode J setup using a couple of old mobil rigs--the > rx unit is an IC 2350H. 10 el cheap yagi through 60ft of LMR400. > > I'm considering options for a mast preamp for rx only. I'll be using a > diplexer for desense ahead of it, and eventually add coaxial switching > so I can use TX. > > I'll feed with power through extra wire in rotor cable. > > Looking at the Hamtonics, DEMI kit and a hombrew from scratch. > > 1. Any experiences with the DEMI units as kits? > > 2. with there relatively high NF, are the MMIC devices like the ERA > series, at all appropriate for simple mast preamps for entry level > application? > > Thanks to all. > > Curt > KU8L > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

13 years, 6 months

ICOM IC-910 Owners, HELP

by Dave Guimont

I've misplaced my IC-910 manual, and I need pin numbers for the 8 pin ICC-1 to connect my radio to my computer sound card so I can use MixW. I can read the pin numbers. One of them must be ground, and the other pin number for output to the sound card... 73, Dave, WB6LLO dguimon1(a)san.rr.com Disagree: I learn.... Pulling for P3E...

13 years, 6 months

Any new on new satellites?

by gu6efb

Hi all I have just been looking at the various Amsat web sites looking for information about upcoming amateur satellites and launch dates. Most of the information I found is quoting satellite completion and lunch dates that have long passed but the satellites are still on the ground.Dose anybody know of any more up to date information they may wish to share with us. I am still supporting my Amsat group here in the UK but news is very scant 73 Keith GU6EFB

13 years, 6 months

Re: STS-9 W5LFL audio tapes

by K8KFJ＠aol.com

In a message dated 11/30/2008 3:27:35 P.M. Eastern Standard Time, wb5rmg(a)somenet.net writes: > Does anyone know if any of these tapes are still around ? Perhaps an email to both the ARRL and WA2DHF (Producer) might be worth a try. I can tell you (with regard to Tape #1 Side "A") that W7ID, K0RZ, KQ5D (YL?) and WA1JXN were the first 4 callers with great signals although he only responded to the WA1 station. 73, Gary -K8KFJ- AMSAT #32,574 Sat VUCC #125 **************Life should be easier. So should your homepage. Try the NEW AOL.com. (http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000…)

13 years, 6 months

ISS ops in the next weeks (9k6)

by Henk, PA3GUO

Ha ! To my best knowledge the 9k6 mode is new (though std for the D700). Certainly interesting to see the results of this new mode. I assume UNPROTO settings will be the same as for 1k2 APRS (Kenneth, can you confirm ?) Anyway, I will first monitor the downlink, see if the BBS will be on and/or APRS and/or 'plain' packet. Henk, PA3GUO --------------------------------------------------------------------- ---December 1-5--in addition to school contacts and APRS digi operations, we plan to configure the radio system for cross band repeater operations. This will utilize the standard U/V operations in low power mode. ---December 7-12 we will run a test of 9600 baud packet operations on the simplex frequency 145.825 MHz. ---Given that PCSAT should be in full sun starting December 9, December 14-19 we will switch to 1200 baud packet on 145.825 to support double hop opportunities. ---And at times, especially during the weekends, you might see some SSTV operations if the crew is available.

13 years, 6 months

AO-51 Modes For December

by John Marranca, Jr

Drew: Is there a possibility that AO-51 can be configured for SSTV mode again? That was tons of fun...and I know there are others that ALSO had fun with it. TNX. John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA Local 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

13 years, 6 months

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AMSAT-BB November 2008