AMSAT-BB April 2009

205 participants
306 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, 6 months

Re: EggBeater

by Bill Dzurilla

Steve, I have both a commercial and a homebrew Eggbeater and am disappointed with both, especially in light of its rather high price. Connected to my IC-7000 via an ARR mast-mounted preamp, performance is far less than with an HT and an Arrow. Guess an omni can't cut it, at least not from my QTH. Maybe if I could get it up higher, clear of all roofs, it would do better. I can make contacts at relatively high sat elevations, but can do just as well with a $10 dual band ground plane. My friend has an Eggbeater and the same preamp at a clearer QTH, and he hears substantially better, down to 10 degrees elevation in some directions. Good luck and 73, Bill NZ5N > > Hi Steve, > > > > It is surprising to read that you are not hearing > anything. I have > > repeatedly used a 2m and 70cm Eggbeater for the sats > and have had no > > problem hearing things. No pre-amp. > > > > I was using a short cable (e.g. less than 10 meters). > The rigs I > > used were a FT-736r (deaf) and a FT-847 (so-so). > > > > 73, > > > > Dave

9 years, 8 months

2.4 Gig

by Arlon Nelson

Are there any satellites on 2.4 gig so I can check out my old AO-40 dish. 73, Nels, WØTUP Minot, North Dakota nels(a)w0tup.com http://www.w0tup.com Ward County - Grid Locator DN98if TRIPLE PLAY AWARD No. 75 - A1 OPERATOR CLUB SKCC 31T - Flying Pigs 590 - QRPp-I #760 ARRL - FISTS #8610 - CC #1310 - FISTS WAS #143 FISTS PLATINUM #365 - FISTS SILVER #367 ARRL SSTV WAS #33 - IVCA MIXED BAND SSTV #1 40 MTR CW WAS - DXCC # 39623 - RTTY WAS # 585 COMMERCIAL RADIO OPERATORS LICENSE *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* CLUB CALL - WØJER (MAGIC CITY QRP CLUB) FISTS #11975 SKCC #1000 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Two antennas met on a tower, fell in love and got married. The ceremony wasn't much, but the reception was excellent. *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

12 years, 7 months

AMSAT Field Day 2009 Rules

by Bruce

Once again we are approaching the 4th full weekend in June and that means Field Day. I have posted the AMSAT 2009 Field Day rules on my website in both pdf and doc formats. http://www.amsatnet.com/2009fd.pdf http://www.amsatnet.com/2009fd.doc It will appear in the May/June issue of the AMSAT Journal and at http://www.amsat.org (soon). 73...bruce -- Bruce Paige, KK5DO AMSAT Director Contests and Awards ARRL Awards Manager (WAS, 5BWAS, VUCC), VE Houston AMSAT Net - Wed 0100z on SkyScanner Satellite Radio Network on Galaxy-25 @97° West, Transponder 23 (12115 Vert), Symbol Rate: 22425, APID: 1794 (DVB Free To Air) Also streaming MP3 at http://www.amsatnet.com Podcast at http://www.amsatnet.com/podcast.xml or iTunes Latest satellite news on the ARRL Audio News http://www.arrl.org

12 years, 8 months

Re: New version of AO-27 Schedule Lister released!!!

by George Henry

I'm no Java whiz either (my son is the programmer, not me), but my best guess is that you need to update your Java Runtime version. The program was compiled on a computer with JRE 1.6.0, so you probably need that version. The Windows .exe has run fine on all 5 computers I've tested it on, and all are at JRE 1.6.0. The .jar ran fine on the Ubuntu 8.04 ("Hardy Heron") box I tested it on, but I did not check the Java version on that machine. In Windows, you can check your JRE version clicking the Java icon in Control Panel, or by typing java -version on the command line. 73, George, KA3HSW ----- Original Message ----- From: "Greg D." <ko6th_greg(a)hotmail.com> To: <ka3hsw(a)att.net> Sent: Thursday, April 30, 2009 12:18 AM Subject: RE: [amsat-bb] New version of AO-27 Schedule Lister released!!! Hi George, I'm kind of dense when it comes to Java applications, but I can't get either version to run. The Windows version pops up an error box saying "Could not find main class. Program will exit.", and the Linux (cross-platform) version says all this stuff, below. What am I doing wrong? Thanks, Greg KO6TH [email protected]:~/download/AO-27_Scheduler> java -jar AO-27Lister1.1.jar Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass2(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:719) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:160) at java.net.URLClassLoader.defineClass(URLClassLoader.java:254) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) [email protected]:~/download/AO-27_Scheduler>

12 years, 9 months

Question about building the "Cheap" Antenna by WA5VJB

by racer5039

I am working on some a couple of the "Cheap" antennas by WA5VJB, that have been talked about on here. I am building these for Field Day and th use for some moble work on AO-51 & AO-27 after that. My question is this, Is the "J" /DE element centered in line with the others or is just the long side in line? My guess is the long side but thought it better to ask. Thanks Marv N0FJP

12 years, 9 months

Re: New version of AO-27 Schedule Lister released!!!

by George Henry

Yeah, I gotta fix that.... I had set the page up with the original version, and then when the new version was ready, simply deleted the original files and uploaded the new ones, and somehow, Google sites didn't handle it right (even tho the file names and locations are exactly the same...) George ----- Original Message ----- From: "Alan P. Biddle" <APBIDDLE(a)UNITED.NET> To: "'George Henry'" <ka3hsw(a)att.net> Sent: Thursday, April 30, 2009 7:11 AM Subject: RE: [amsat-bb] New version of AO-27 Schedule Lister released!!! > George, > > Thanks for posting those. The web page isn't quite set up correctly. > Clicking on either of the HERE buttons gets an error message: > > ================ > AO-27 Satellite Scheduler > Page not found > > We're sorry, but we were unable to locate the page you requested. > > Here are some similar pages from this site: > > * AO-27_Scheduler.zip > > Go to Home > ============== > > However, clicking on the file does get you what you want, as does clicking > on the attachment list at the end of the page. > > Alan > WA4SCA > > >

12 years, 9 months

UT1FG/MM

by D. Craig Fox

Worked Yuri last night on SSB on FO29. He is apparently still in port in EM40. 73s Craig, N6RSX NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient of this communication, or an employee or agent responsible for delivering this communication to the intended recipient, please advise the sender by reply email and immediately delete the message and any attachments without copying or disclosing the contents. Thank you.

12 years, 9 months

Mobile Computer / Radio Installations

by Clint Bradford

>> ... Most cigarette lighters circuits have a 15 to 20 amp fuse on them. That ought to work fine for charging/using with your computer ... That amount of current can/will destroy sensitive electronic devices. (20A??? That's more than what an Icom IC-706MKIIG uses at 100W TX power ... ) Personally, I would never run my laptop off a vehicle's charging system while the vehicle is running. You won't find many reputable laptop manufacturers recommending this. And all power feeds to my radio gear are properly conditioned and filtered. If I needed to run my laptop for extended periods on a 12VDC system, I would use nothing less than a ... Tripp Lite PVINT375 (although this model comes with a cigarette lighter plug, that connection has to be one of the electrically most UNreliable for what we are doing - so the plug gets whacked off and the unit is wired directly) ... or Astron Pi-250W 12VDC-to-120VAC inverter made for such circumstances. Wire it in to your vehicle's 12VDC system, and simply use your existing AC power supply. Immediate benefit is the ability to power/ charge other electronic items you may have using regular AC chargers. There's no need to know the voltage/current/connectors of the laptop. The laptop's manufacturer already did all that work for you when they supplied the AC adapter. Another downfall of using the cig lighter circuit for comms: very rarely is that line filtered for noise and such. I mean, who needs that line filtered to heat up a cig lighter? More intelligent cars do have filtered/conditioned "power ports." But I do not leave anything to chance, and make sure my equipment is properly protected. Then there are folks who run their 100W HF rigs through a cig lighter plug and swear that all's well with the world ... And so it goes. Clint Bradford, K6LCS http://www.clintbradford.com 909-241-7666

12 years, 9 months

Hudson Valley Satcom Group Net

by Cotejaune2＠aol.com

Don't miss the Hudson Valley Satcom Group Net tonight, April 30. At 8 PM on eholink node n2eyh-l. Or on the Mt.Beacon 146.970 repeater PL 100. Please join us and share your satellite knowledge with the group. 73 Gary wa2aqh **************Big savings on Dell XPS Laptops and Desktops!(http://pr.atwola.com/promoclk/100126575x1219491521x1201306563/aol… click.net%2Fclk%3B214102108%3B35952091%3Bs)

12 years, 9 months

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AMSAT-BB April 2009