September 2007 - AMSAT-BB - mailman.amsat.org

Lessons Learned in my first week of Sat work
by Rhett Duke 23 Sep '07

23 Sep '07

Monday the 17th: Took Kenwood D7 H/T ,compass and arrow antenna out into a 10 acre field and waited for an AO-51 pass.....it was right where it was supposed to be and I was able to follow it with no problem.....heard QSO's for most of the pass....had somewhat of a sound similar to sideband transmissions.I'm excited.....just a week before I thought I would need a digital compass and inclination meter to pinpoint the bird all through the pass :) Tuesday the 18th: Went out again and thought I would try to make a contact myself.....tracked the bird ok threw out my call and grid square but never heard myself in the downlink.......after the pass I get on a local repeater with the same H/T and the guys say I'm having a hard time getting into the repeater.......I don't usually use the Kenwood for voice...its primarily my portable APRS radio......I've known since day one it didnt have the "range" my Yaesu H/T's did..... Wednesday the 19th I decide to check the power output on the Kenwood H/T.....1 watt on high on VHF...5-7 watts on UHF depending on battery or external power......Now I'm thinking this explains a lot....I bet the VHF was bad all along.....I'm just amazed how well it had worked for APRS the past few months with 1 watt. Thursday the 20th I use the Kenwood to receive on UHF and a Yaesu VX-170 to transmit on VHF.....bypass the duplever on the Arrow antenna but I just couldnt point the antenna hold both ht's....the mike cord....headphone cable and coax from both radios were more than a handfull :) Friday the 20th I set up on a camera tripod.....got the wire jungle a little more under control and was able to hear myself in the downlink.....no one came back to me....there were a lot of stations in the mix...... Cant wait to get the Kenwood D-7 back.....I think its gonna be a lot easier to get a contact under my belt with just one radio to contend with.......But all that said I'M EXCITED......Hearing my own voice in the downlink just proved that it can be done !!!!!!!!! 73 KI4OVO AMSAT # 36579 -- I am always doing that which I can not do, in order that I may learn how to do it.

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Re: New Preamp
by i8cvs 23 Sep '07

23 Sep '07

Hi Tom, K5SAF I have sent to you two zipped files concerning the W1DTY article but they bounced back to me. Please send to me another email address. 73" de i8CVS Domenico ----- Original Message ----- From: "Tom Matthews" <tcm10(a)comcast.net> To: "'i8cvs'" <domenico.i8cvs(a)tin.it> Sent: Sunday, September 23, 2007 4:56 PM Subject: RE: [amsat-bb] Re: New Preamp > Domenico, I would love to have a copy of the article you mentioned. > > TNX & 73, > > Tom, K5SAF

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Worked Three Countries
by Clint Bradford 23 Sep '07

23 Sep '07

It didn't "hit" me until several hours later...I actually worked THREE COUNTRIES last Saturday night with demo'ing workin' the sats: On the 8:20pm AO-51 pass, we worked Mexico, the U.S., and a gentleman in British Columbia! I'll be working the 8:07pm Pacific time pass this evening again from the Los Angeles County Fair - It's about as great a pass as I could ask for...passing darned near over our event! Clint Bradford, K6LCS / KAF3359 909-241-7666

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K3SZH / AO-7
by SV1BSX 23 Sep '07

23 Sep '07

Hi again, well, just 2 days before I wrote about 3000 entries of Henri, F3ZD into Emily's AO-7 Log and today I noticed that another record took place: 4000 entries, by Joe K3SZH ! ( http://www.planetemily.com/ao7/ao7log.php ) Congratulations to Joe ! He he... great competition on AO-7! The "Grand Old Lady" should be very proud... after 33 years she is active, healthy, beautiful and extremely attractive among Hams ! Like the old, good French wine ! 73, Mak SV1BSX Email: sv1bsx(a)yahoo.gr URL : http://sv1bsx.50webs.com --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 000775-6, 09/22/2007 Tested on: 9/23/2007 17:03:57 avast! - copyright (c) 1988-2007 ALWIL Software. http://www.avast.com

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New Preamp
by Bryant 23 Sep '07

23 Sep '07

Thanks for all the comments to my questions about "New Preamps" both on the BB and off list. I have ordered two from AR2 and I'm not going to worry about signal attenuation by the nearby pine trees. v. 73 Bryant, W2RGG

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drafting sputnik-1 tle
by andy thomas 23 Sep '07

23 Sep '07

Looking at my previous posting I can see that the RAE data is different from the data on the SEESAT site as I am trying to put it into tle format. As suggested, it'll be great to run it as a simulation using contemporary keps exactly 50 years old. I remember some years ago writing a simple prediction program using some of the TLE data and getting a print out from NASA identifying the elements in the two line set, and now I see it's reproduced on the amsat'org website. But I do not know how to calculate the RAAN, the Mean Anomolay and the Checksum, and I make an assumption of zero drag. So far I have: SPUTNIK-1 1 000001U 57 1 A 57277.8 .CCCCCCCC 000000-0 000000-0 0 Z 2 00000165.1000 III.IIII 052000 58.000 MMMM.MMMM 14.92723492 Z The bits I don'tknow how to calculate are: .CCCCCCCC this is the drag factor - can it just be set to zero initially? III.IIII this is the infamous RAAN - I gather it is calulated from the Mean Motion and a reference time but don't know any more MMM.MMMM this is the Mean anomoly and again I wonder if it can't just be set to zero at least at first? Finally Z which is line checsksum - I don't easily understand the definition "the sum of all integer characters on a line plus a 1 for each negaitve sign - it's the modulo-10 of the sume ofthedigits and negative signs" (I might get there and will try when I've done the rest). Would appreciate it if amsatters who are better mathematicians than I am, could conclude the TLE, then I plan to use STS+ in time simulation mode to run it. 73 de andy G0SFJ ___________________________________________________________ Want ideas for reducing your carbon footprint? Visit Yahoo! For Good http://uk.promotions.yahoo.com/forgood/environment.html

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FW: ATF-54143 preamp for 70cm
by Don Ferguson 22 Sep '07

22 Sep '07

From: Don Ferguson [mailto:[email protected]] Sent: Saturday, September 22, 2007 8:55 PM To: 'Kyle Yoksh' Subject: RE: [amsat-bb] ATF-54143 preamp for 70cm Kyle, Jim, W6PQL offers a kit for these preamps. Check out his site at this url. http://www.w6pql.com/l_%26_s_band_lna.htm I built this preamp and it went together well but I have not put it on the air yet. 73, Don Kd6ire -----Original Message----- From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On Behalf Of Kyle Yoksh Sent: Saturday, September 22, 2007 10:19 AM To: amsat-bb Subject: [amsat-bb] ATF-54143 preamp for 70cm Hello, A while back someone was offering a kit for a 70cm preamp that uses an ATF-54143 PHEMT device. I have a few of these 54143s, but haven't found time to acquire the rest of the parts, etc. Please let me know if anyone offers a PCB or full kit. Thanks and 73, Kyle Yoksh K0KN Olathe, Kansas Amsat# 35249 _______________________________________________ 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

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GO-32 APRS findu
by Mineo Wakita 22 Sep '07

22 Sep '07

4XTECH-12>BEACON,qAO,JE9PEL:>Sat Sep 22 23:36:44 2007 :UTC| Gurwin Techsat1B (V9.87) 4XTECH-12>BEACON,qAO,JE9PEL:BBS(V9.87 beta) 2Users/8BCasts. 4XTECH-12>BEACON,qAO,JE9PEL:Upl:145.89,145.93,1269.8,1269.9 4XTECH-12>BEACON,qAO,JE9PEL::BLN1 GO32:Test APRS!!Use pth via 4XTECH 4XTECH-12>BEACON,qAO,JE9PEL::BLN2 GO32:APRS msgs and clients use 145.85 Upl 4XTECH-12>BEACON,qAO,JE9PEL::BLN3 GO32:D7&D700 posits use 145.93 4XTECH-12>STATUS,qAO,JE9PEL:>B:22976647 4XTECH-12>BBSTAT,qAO,JE9PEL:Open:AB1C23: 4XTECH-12>BBSTAT,qAO,JE9PEL:Open:AB1C23: 4XTECH-12>STATUS,qAO,JE9PEL:>B:22976771 4XTECH-12>STATUS,qAO,JE9PEL:>B:22976895 4XTECH-12>BBSTAT,qAO,JE9PEL:Open:AB1C23: 4XTECH-12>STATUS,qAO,JE9PEL:>B:22977019 4XTECH-12>BEACON,qAO,JE9PEL:>Sat Sep 22 23:38:52 2007 :UTC| Gurwin Techsat1B (V9.87) 4XTECH-12>BEACON,qAO,JE9PEL:BBS(V9.87 beta) 2Users/8BCasts. 4XTECH-12>BEACON,qAO,JE9PEL:Upl:145.89,145.93,1269.8,1269.9 4XTECH-12>BEACON,qAO,JE9PEL::BLN1 GO32:Test APRS!!Use pth via 4XTECH 4XTECH-12>BEACON,qAO,JE9PEL::BLN2 GO32:APRS msgs and clients use 145.85 Upl http://www.findu.com/cgi-bin/raw.cgi?call=4XTECH-12

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Keps for Sputnik I
by Pughkeithd＠cs.com 22 Sep '07

22 Sep '07

Does anyone have a set of Keplerian Data that would produce a reasonably accurate simulation of the initial flight of Sputnik I, launched on 4 October 1957? I would like to be able to use these Keps in any of the popular Satellite Tracking Programs to illustrate the initial orbit of Sputnik I. Of course the launch time for purposes of this set of Keps could be on the 50th Anniversary of Launch, 4 October 2007. 73 - Keith, W5IU

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GO-32 aprs
by ryan woods 22 Sep '07

22 Sep '07

Is Go-32 aprs digi still enable 73 kd8atf fm09om see you on iss --------------------------------- Yahoo! oneSearch: Finally, mobile search that gives answers, not web links.

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