AMSAT-BB September 2008

194 participants
265 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

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

way of satellite recovery?

by AB2VY

Hi to everybody, after have reading this article about the possibility of bringing Vanguard 1 back to Earth http://www.msnbc.msn.com/id/23639980/ , an "unhealthy" idea has crossed my brain... , premise that Vanguard 1 is "3.25-pound (1.5-kilogram), 6.4-inch-wide (16.3-centimeter-wide)" so little.. , a program to recover/repair something of too bigger ( like... AO40 ?? ......) is possible ? if the answer is "yes" the costs are too bigger or too low than the launch costs (4.5 million to 15 million Euros to launch) explained by David G0MRF in the past message? Logically it is necessary that NASA has a similar mission to which rely... would be an interesting study on this possibility of recovery/repair a satellite like AO40 "dead" in space this message wants to be an open track for a discussion about "Satellite repair in Space" thanks for your attention and best 73 Giulio AB2VY (ex KC2OTB) c/o Toms River NJ AMSAT-NA member 36417 Posta, news, sport, oroscopo: tutto in una sola pagina. Crea l'home page che piace a te! www.yahoo.it/latuapagina

13 years, 7 months

AO-51 L/U

by Mineo Wakita

AO-51 is working now as L/U mode. But we can not digipeat via PACB-1. Well, can you access PBBS using WiSP via PECHO-11? Fm PACB-1 To TIME-1 <UI pid=F0 [DAMA] [EAX25] Len=64 >[09:24:56] PHT: uptime is 012/05:30:18. Time is Tue Sep 16 09:25:58 2008 Fm PECHO-11 To PBLIST <UI pid=F0 [DAMA] [EAX25] Len=11 >[09:24:56] PB: Empty. Fm PACB-1 To TLMS-1 <UI pid=F0 [DAMA] [EAX25] Len=35 >[09:24:57] C0:0D C1:44 C2:76 C3:2F C4:04 C5:01 Fm PACB-1 To TLMD-1 <UI pid=F0 [DAMA] [EAX25] Len=74 >[09:24:57] WOD:2 ATP:0 BMW:1 BMS:0 CTS:1 CTN:120 CTL:109 CTE:Sat Sep 20 23:22:21 2008 Fm PACB-1 To LSTAT <UI pid=F0 [DAMA] [EAX25] Len=46 >[09:24:57] I P:0x13A8 o:0 l:27314 f:27325, d:1 st:6 e:0d JE9PEL, Mineo Wakita

13 years, 8 months

AO-51 L/U SSB mode

by Luc Leblanc

Hi Something happen at 2300Z (1900EST) suddenly the audio level jump louder by a factor of 4 i have to reduce my volume level and i found my TX audio was also much too loud... Now AO-51 look like AO-16 audio and QSO are manageable. I succeed to have one with Clare VE2NPC and i also copy a lot of station but at the same floor level strength i used to have before my adjustment (see below). Only Clare VE3NPC signal seems to get over this curious bottom floor level?? To be clearer all the station coming out the satellite are equal in strength? Only Clare was louder as a kind of AGC treshold seems to be set too high making a kind of squelching effect? I just made some adjustment here at the end of the afternoon in a hurry and from an uplink signal very marginal it became near Q5!!! i'm not too sure what i done and if it is what i done who boost my uplink but i will have to make some test again as said something happen also on the satellite at the same time? More to come...and i was able to hear my downlink at LOS + 3'!!! "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe WAC BASIC CW PHONE SATELLITE

13 years, 8 months

Advertising Shuttle Retransmission Faclities on APRS

by Robert Bruninga

To Shuttle rebroadcasters: Many people do not monitor your Shuttle Retransmission frequencey all the time, and so, may not remember that the Shuttle is in orbit. Therefore, a TNC should be connected to the Retransmitter that activates an APRS beacon on the local APRS channel whenever it is keyed. This APRS beacon will alert all mobiles on the front panel of their APRS radios in range that the retransmission is in progress. We need to get this info out to all volunteer rebroadcasters... This web page shows how to use just an old TNC and no special software to format the beacon so that it shows all the relevant information right there on the front panel of the mobile APRS radios: http://www.aprs.org/On-Air-beacons.html This technique also applies to all re-broadcasters of the Newsline, RAIN report, ARRL Audio file, and any other general info nets that need to be heard by all radio amateurs. APRS is your universal real-time ham radio information channel. If you have info to share, beacon it on APRS live. Monitor APRS and see what is happening in your area. Bob, WB4APR

13 years, 9 months

Xastir

by Nigel Gunn G8IFF/W8IFF

Anybody know the log on user and password for Xastir-Herdy? -- <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> Nigel A. Gunn. G8IFF W8IFF (was KC8NHF) 1865 El Camino Drive, Xenia, OH 45385-1115, USA 937 825 5032 e-mail nigel(a)ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK, MKARS, ALC <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

13 years, 9 months

Re: (no subject)

by James Craig

Thanks Tim, I agree, without doubt, the most fun had on amateur radio so far....only wish I'd started sooner! regards, James - ZL4JM davenbeck.engineering(a)gmail.com +64 (0)21 1477265 - original message - Subject: Re: [amsat-bb] (no subject) From: n3tl(a)bellsouth.net Date: 30/09/2008 15:58 Congrats, James ... and welcome to orbit! I've only been working the satellites for a few months, but I still get the same rush of excitement every time I hear that first signal, which tells me I've acquired the satellite for a given pass. This is the most fun I've ever had in amateur radio! 73, Tim - N3TL AMSAT Member No. 36820 Athens, Ga. EM84ha - USA -------------- Original message from "James Craig" <davenbeck.engineering(a)gmail.com>: -------------- Well I just worked my first ever satellite this evening (AO-51) and all I can > say is WOW!.....The smile is still on my face! What a blast! > regards, > James - ZL4JM > davenbeck.engineering(a)gmail.com > +64 (0)21 1477265 > > > _______________________________________________ > 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, 9 months

(no subject)

by James Craig

Well I just worked my first ever satellite this evening (AO-51) and all I can say is WOW!.....The smile is still on my face! What a blast! regards, James - ZL4JM davenbeck.engineering(a)gmail.com +64 (0)21 1477265

13 years, 9 months

Falcon 1 successful

by Bob McGwier

Falcon 1 successfully made it to orbit today. http://www.spacex.com/ Falcon 9 Heavy will be a 12000 Kg to GTO launcher and will almost certainly have test flights. http://www.spacex.com/falcon9_heavy.php and it pays to have friends: http://www.space-travel.com/reports/Jeff_Ward_To_Head_Up_Avionics_Guidance_A nd_Control_At_SpaceX_999.html Bob N4HY ARRL SDR Working Group Chair Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. "Trample the slow .... Hurdle the dead"

13 years, 9 months

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AMSAT-BB September 2008