October 2009 - AMSAT-BB - mailman.amsat.org

Call for Papers--2007 ARRL/TAPR Digital Communications Conference
by Ford, Steve, WB8IMY 16 Jul '12

16 Jul '12

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

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Re: EggBeater
by Bill Dzurilla 29 May '12

29 May '12

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

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FW: Re: The Moon is our Future
by Dave 15 Mar '11

15 Mar '11

We have met the enemy and they are us. WE need to do something. Yes, $15m is outta reach, but isn't there a cash prize for the first on-commercial moon landing? Dave DM78qd // KA0SWT If it weren't for Philo T. Farnsworth, inventor of television, we'd still be eating frozen radio dinners.-- Johnny Carson +++++++++++++++++++++++++++++++++++++ -----Original Message----- From: amsat-bb-bounces(a)amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Jeff Davis Sent: Thursday, July 02, 2009 9:35 AM To: amsat-bb(a)amsat.org Subject: [amsat-bb] Re: The Moon is our Future On Thu, Jul 02, 2009 at 06:48:51AM -0600, Jack K. wrote: > communications anyway) and move forward... We can put up all the leos > we want, but until someone makes something like B. Bruninga's cell > concept work, we are only going to have more of the same, We don't > need more of the same! I couldn't agree more - we don't need more of the same. If I want to sit back and have a two hour rag-chew with someone on the other side of the planet I will use Skype or my cell phone! Dreaming about what *might* be in space is a fun exercise. Actually doing something about it requires sending things to LEO because reality has dictated that's as far as we can afford to go. How's about we use some of that frustrated *imagineering* to come up with interesting new concepts at LEO? We don't need any more FM repeaters buzzing overhead, but what about more cameras downloading HD images, scientific payloads that monitor the ongoing climate change, payloads to study the Earth's magnetic field, etc. etc. Our own 'Twitter' messaging network from space...? The Apollo 13 creed of "failure is not an option" has completely infected the brains at AMSAT and this list. You want something at HEO or on the moon, cut a check for $15 million dollars and let's get on with it. Been waiting since 1996 for another AO-13 and I am getting too old to keep waiting. AMSAT is becoming completely irrelevant as it strives without success for the impossible mission and exhibits a shocking amount of leadership malfesance as it stubbornly refuses to recognize and adapt to realities in the launch business. I know, I know maybe NEXT year someone rich will die and leave us a boatload of cash. Or the bankrupt US government will suddenly cough up a billion dollars for some orbiting emergency communication system. In the meantime we have to stifle the truth because it might blow yet another *secret* deal that's in the works and *almost* a done deal, so let's not complain publicly and ruin it. Heard the stories, heard the lies, got all the t-shirts and ball caps. Whatever. -- Jeff, KE9V AMSAT-NA member since 1994, Skeptic that we will ever go back to HEO since 2002 _______________________________________________ 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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Re: New AO-51 Whole Orbit Data decoder released by DK3WN
by Mark L. Hammond 04 Nov '09

04 Nov '09

Hi Luc, TLMEcho is the program for LIVE decoding of AO-51 telemetry packets during a pass. Some telemetry channels are sent via 9600 baud packet at a regular interval, usually 10 seconds, and TLMEcho can decode these (using a 9600 baud modem) LIVE as they are coming down. The new WOD decoder is different--it is used to decode satellite telemetry data collected (more channels usually) and stored on the satellite during a whole orbit (usually set for 24 hours). Once the WOD file is finished, it appears on the PBBS and can be downloaded via WISP. The downloaded WOD file can then be decoded by DK3WN's new program after it has been downloaded from the satellite as a big file (about 180k). I hope that helps clear things up :) 73, Mark N8MH __________________ Message: 7 Date: Thu, 22 Oct 2009 12:56:50 -0400 From: Luc Leblanc <lucleblanc6(a)videotron.ca> Subject: [amsat-bb] Re: New AO-51 Whole Orbit Data decoder released by DK3WN To: amsat-bb(a)amsat.org Message-ID: <4AE05692.19949.5C3023B(a)lucleblanc6.videotron.ca> Content-Type: text/plain; charset=ISO-8859-1 On 22 Oct 2009 at 11:39, Mark L. Hammond wrote: Date sent: Thu, 22 Oct 2009 11:39:08 -0400 From: "Mark L. Hammond" <marklhammond(a)gmail.com> Subject: [amsat-bb] New AO-51 Whole Orbit Data decoder released by DK3WN To: amsat-bb(a)amsat.org > Thanks to our resident telemery guru Mike Rupprecht DK3WN a new AO-51 > whole orbit data (WOD) telemetry decoder has been released! ?The file > with decoder and coefficients file can be downloaded from here: > > http://www.dk3wn.info/files/ao51wod.zip > > The AO-51 telemetry archive is on the AMSAT FTP server. ?DK3WN's new > decoder is for processing "raw" WOD telemetry files. ?For example, the > WOD data collected for October 2009 is here: > > ftp://ftp.amsat.org/pub/amsat/telemetry/ao51/2009WOD/Oct2009/raw1009/ > > > The decoder generates a .CSV (comma separated) file that can be opened > in Excel, etc. ?A nice feature is that the telemetry program acutally > graphs the data, too! > > THANKS, Mike DK3WN! > > 73, > > -- > Mark L. Hammond [N8MH] > > _______________________________________________ > 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 > Hi Mark Is it a new program or a new update for "tlmecho"? I guess it's a new one but just to be safe. Thank's Thank's "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE -- Mark L. Hammond [N8MH]

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LVB Tracker kit
by Jean-François Ménard 02 Nov '09

02 Nov '09

Hi, I probably missed something.... but on AMSAT website, we are able to buy the LVB Tracker completely assembled, the bare board without any part or only the enclosure........ What about a complete LVB Tracker.... but as a kit ?? I don't want to save money, I just like to build, when possible, my hardware. Is there a place to purchase a complete LVB Tracker (parts and enclosure) as a kit instead of completly built ?? Thank for your help. 73 -- Jean-François Ménard VA2SS =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= AMSAT www.amsat.org / Member #37102 ARRL www.arrl.org =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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Searching AMSAT-bb archives
by Dave Taylor 01 Nov '09

01 Nov '09

Hi, Just thought I'd remind everyone that all AMSAT mailing lists are archived and past messages are available for search in two ways: 1. Use the Subscription settings link at the end of each message to go to a web page that has a link to the archives for that mailing list. 2. Search using Google, with the search string <search keywords> site:amsat.org/pipermail/<list name> The <list name> part is what appears at the start of a mailing list subject line; for example, "amsat-bb". If you leave off the "/<list name>" part, you will search all public AMSAT mailing lists. (Other search engines can probably do something similar.) Dave, W8AAS AMSAT #8974

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Re: GO-32 Status ?
by Gkcarr 31 Oct '09

31 Oct '09

I made 2 contacts (one ssb, one CW) during pass 24,269 on 30/10. 73 George WA5KBH -----Original message----- From: "Mark L. Hammond" marklhammond(a)gmail.com Date: Sat, 31 Oct 2009 12:42:20 -0500 To: amsat-bb(a)amsat.org Subject: [Spam] [amsat-bb] Re: GO-32 Status ? > Hi Bruce, > > I printed packets from GO-32 on 23:59 UTC 29 Oct 2009, but haven't listened for it since then. > > Have you been listening to it the last few weeks? > > Perhaps it is down again? > > 73, > > Mark N8MH > > ___________ > > > > GO-32 Status ? > > -------------------------------------------------------------------------------- > > Subject: [amsat-bb] GO-32 Status ? > From: Bruce Semple <brucesemple@xxxxxxxxxxx> > Date: Sat, 31 Oct 2009 07:56:06 -0400 > > -------------------------------------------------------------------------------- > > Is GO-32 officially listed as gone? > I did not hear the boot loader / beacon on this mornings pass over NA > / East coast > > > Mark L. Hammond [N8MH] > > _______________________________________________ > 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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ITUpSAT1
by Andrew Rich 31 Oct '09

31 Oct '09

Does anyone have any info on the 19k2 payload ? Andrew VK4TEC I have been playing with some 19k2 http://tech-software.net/tracker%200501.JPG

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Re: Simple 2.4Ghz helix plans
by WILLIAMS MICHAEL 31 Oct '09

31 Oct '09

I have built several 13 cm antennas from the site of G6LVB and WK4R all using PVC. It doesn' get any simpler than WK4R's design. 1 inch sch. 40 PVC and some #14 house wiring. Check out this site. http://wk4r.com/ If you need some tips, email me. I'll be glad to help. Here are some other good websites for 2.4GHz helix antennas. 2. http://ve2zaz.net/ Select 2.4 GHz helix. 3. www.g6lvb.com/ Select quadruple helix for AO-40. 4. www.qsl.net/ve3cvg/antennas/2400/ 73, Mike K9QHO

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Simple 2.4Ghz helix plans?
by Michael Tondee 31 Oct '09

31 Oct '09

I threw this out there on the eham satellite forum looking for answers but I'll try here too. I'm looking for some fairly simple plans for this antenna. Everything I find either seems to be intended for WiFi or if it is ham related is full of mathematical formulas to figure length, diameter, spacing etc. Math was never my strong suit so I'd prefer to find something with the actual already computed dimensions clearly stated. Preferably in English rather than metric measurements. I found an article in the May/June 2008 AMSAT Journal that looked promising but there are no hard numbers, just the formulas and I don't have a calculator capable of some of the computations, much less being able to work them out in my head. Been a long time since I was in school!.. hi hi... I have a downconverter I'm not sure even works and I don't want to spend a huge amount of time and trouble to be able to test it. Tnx and 73, Michael, W4HIJ

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Re: GO-32 Status ?
by Mark L. Hammond 31 Oct '09

31 Oct '09

Hi Bruce, I printed packets from GO-32 on 23:59 UTC 29 Oct 2009, but haven't listened for it since then. Have you been listening to it the last few weeks? Perhaps it is down again? 73, Mark N8MH ___________ GO-32 Status ? -------------------------------------------------------------------------------- Subject: [amsat-bb] GO-32 Status ? From: Bruce Semple <brucesemple@xxxxxxxxxxx> Date: Sat, 31 Oct 2009 07:56:06 -0400 -------------------------------------------------------------------------------- Is GO-32 officially listed as gone? I did not hear the boot loader / beacon on this mornings pass over NA / East coast Mark L. Hammond [N8MH]

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Yaesu radios
by Jean-François Ménard 31 Oct '09

31 Oct '09

Hi, I bought in a hamfest in Quebec, at a very very cheap price, two radio from Yaesu FT-726R and FT-736R. The FT-736R seems to be very neat. It is already connected and working with a CAT cable for satellite operation and finally replaced my 2 FT-817ND. Now I found that I finally have a real full duplex station, and I have a little more power. The FT-726R have the 144, 430 & 440 board in it. It is working very well too, but seems not able to control from CAT. Is there something I could do with this radio or this one is really too old to be part of a sat setup ?? Thanks & 73 -- Jean-François Ménard VA2SS =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= AMSAT www.amsat.org / Member #37102 ARRL www.arrl.org =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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GO-32 Status ?
by Bruce Semple 31 Oct '09

31 Oct '09

Is GO-32 officially listed as gone? I did not hear the boot loader / beacon on this mornings pass over NA / East coast

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Yaesu Rotor
by Douglas Anoman 31 Oct '09

31 Oct '09

If anyone knows of a 5400 rotor for sale please let me know mine is very old... I have repaired it three times now so its time to upgrade. Thanks All.... It can work or not work just as long as it is newer than mine................... Thank You Douglas Anoman KC9MLN KC9MLN(a)AMSAT.ORG Amsat #37043

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Re: Simple 2.4Ghz helix plans?
by Bob- W7LRD 31 Oct '09

31 Oct '09

http://www.csgnetwork.com/antennahtcalc.html http://www.rac.ca/tca/2006-01%20Helix%20Design%20Calculator.html Hello Mike Here are a couple I have used. Also find attached are a few pictures of past and some present antennas. I have followed the same process and building methods for L band antennas. I have used Drake, Transystem, Keps and SSB downconverters. The helix is pretty forgiving in measurements. I have the book "Antennas" by Kraus and have "tried" to follow the math and theory. Sort of fair in that regard. I find once I have built few and actually used them, I start to get a feel for them. Which downconverter do you have? There are several good articles in past AMSAT journals. Specifically by Clair-VE3NPC, also K0VTY -Joe, he has forgotten more than I'LL ever know. I have corresponded with them many times. I have built many short helix feeds (5 turns) for off center dishes. In fact that's what I used for AO-40 (sobsob). So, good luck with your efforts. If I can give you any hints, suggestions or whatever, just drop me a email. 73 Bob W7LRD Seattle ----- Original Message ----- From: "Michael Tondee" <mat_62(a)netcommander.com> To: "Amsat BB" <amsat-bb(a)amsat.org> Sent: Friday, October 30, 2009 9:03:02 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Simple 2.4Ghz helix plans? I threw this out there on the eham satellite forum looking for answers but I'll try here too. I'm looking for some fairly simple plans for this antenna. Everything I find either seems to be intended for WiFi or if it is ham related is full of mathematical formulas to figure length, diameter, spacing etc. Math was never my strong suit so I'd prefer to find something with the actual already computed dimensions clearly stated. Preferably in English rather than metric measurements. I found an article in the May/June 2008 AMSAT Journal that looked promising but there are no hard numbers, just the formulas and I don't have a calculator capable of some of the computations, much less being able to work them out in my head. Been a long time since I was in school!.. hi hi... I have a downconverter I'm not sure even works and I don't want to spend a huge amount of time and trouble to be able to test it. Tnx and 73, Michael, W4HIJ _______________________________________________ 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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Yaesu G-5500 azimuth and elevation resistor pots
by Mark L. Hammond 30 Oct '09

30 Oct '09

Hello All, We really need a FAQ section on the AMSAT web page for the Yaesu az/el units :) Anyhow, here's my question: Are the G-5500 azimuth and elevation resistor pots the same or different? Does anybody have the replacement part(s) number (s) handy--either from Vertex/Yaesu or another supplier? My azimuth pot is going bad. Thanks, -- Mark L. Hammond [N8MH]

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XE3DX Grids EK15, EK25, EK26
by John Papay 30 Oct '09

30 Oct '09

David XE3DX will be on from EK26 today, October 30th as follows: "Now I'm on the road, I will work EK26 today, this has been rapid, if I do today, may not do in the future. TODAY October 30, 2009 AO-27 13:34 XE 19:34 UTC 15:15 XE 21:15 UTC AO-51 16:54 XE 22:54 UTC 18:34 XE 00:34 UTC" Also look for him on October 31 and November 1st. John K8YSE John Papay john(a)papays.com

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Re: Yaesu G 5400 elevation rotator quit working
by Henk, PA3GUO 30 Oct '09

30 Oct '09

Hi John, To complement the description of Domenico, here is how my KR500 looked like from inside (picture 5&6): http://www.pa3guo.com/kr500.html I did clean it & apply greece over the balls. A photo of that greece (the brand) you get when you go to http://www.pa3guo.com and click on Rotors, then scroll down. Not sure if my problem was your problem. What you describe is different, mine was simply stuck. Anyway, all these rotors need some treatment :-) Mine worked fine since then (6 years now). Succes, Henk, PA3GUO

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AO-51 mode VS success at 5 degrees
by Greg D. 29 Oct '09

29 Oct '09

Hi Drew, If you're still interested in mode VS signal reports, I just worked KG6NUB at 5 degrees elevation. He was pretty much full quieting on the 2.4 ghz downlink here in CM98, and reports he was using an arrow antenna with his HT out on the lawn in CM87 on his end (presumably running mode VU). Nice job, both of you! Greg KO6TH _________________________________________________________________ New Windows 7: Find the right PC for you. Learn more. http://www.microsoft.com/windows/pc-scout/default.aspx?CBID=wl&ocid=PID2472…

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Yaesu G 5400 elevation rotator quit working
by John 29 Oct '09

29 Oct '09

My Yaesu G 5400 Elevation rotator decided to quit working Friday morning. I could press the up and down buttons and hear the motor running but the antennas would not move. After being gone out of town for two days, I decided to try it again Sunday night. And to my amazement, it worked. The antenna moved. Anybody have any clues as to why this happens and what to do to fix it? Thanks, John C. KE5GFJ Pampa, Texas Ke5gfj(a)centramedia.net

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WBFM with the ICOM: IC706MK2 and G, IC-703+
by Stan, W1LE 29 Oct '09

29 Oct '09

Hello The Net: Can some one confirm that the IC-706MK2 and the 706MK2G can both handle WBFM in the 6M and 2M ham bands ? Objective is to use this rig as an RX IF with a 2.4 GHz down converter and have enough detected BW for a Multi7 TNC to decode the 2.4 GHz sats. As I recall the IC-703+ can not do any WBFM. Thanks Stan, W1LE FN41sr Cape Cod

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Small Mode-UV Linear Transponder Website
by William Leijenaar 29 Oct '09

29 Oct '09

Hi AMSATs, For the interrested people, I made some website with more technical information of my small linear transponder design. It can be found at: www.leijenaarelectronics.nl 73 de PE1RAH William Leijenaar ---

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Re: using a microsat as a potential high altitudeVHF reflector
by andy thomas 29 Oct '09

29 Oct '09

I still think that a large unfolded and/or (partially?) inflatable structure of reflective material structured as resonant reflectors could be an interesting passive reflector of ham frequencies if it was placed on the Moon. It would be easier than a powered active repeater. I know about moonbounce obviously and the laser system left behind by Apollo. 73 de andy G0SFJ

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Stealth Satellite Station?
by Kent Frazier 29 Oct '09

29 Oct '09

I currently live in a rental house and an outside antenna is out of the question. I asked about putting up a satellite TV dish at my own expense last year and received and flat out "NO". So, my current options are as follows: 1. Going out to my car and working the FM birds with my Icom 2720H and 19" whip. 2. Working the FM birds from the back/front yard or possibly inside the house with my Icom W32A and Elk LP antenna. 3. Setting up my 2720 in the house with some sort of stealth antenna and give a try at satellite APRS. Obviously options 1 and 3 still allow for option 2. Has anyone tried any form of stealth antenna for Satellites. I am really interested in the idea of combining the satellites and aprs together. -- Kent R Frazier, K5KNT AMSAT #36765, ARRL, San Angelo Amateur Radio Club, Tom Green County - ARES Sent from San Angelo, TX, United States

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Hudson Valley Satcom group Net Tonight On Echolink N2EYH-L Oct.29 At 8PM
by Cotejaune2＠aol.com 29 Oct '09

29 Oct '09

It is time again for the net tonight. Hope you can join us and share your satellite knowledge with us. Hope to hear you there. 73 Gary WA2AQH

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Re: FT-897D - WFM
by Randy 29 Oct '09

29 Oct '09

That's exactly why I thought it would be capable of it, because its NOT in the amateur band And additionally, because the handhelds were capable of that. I have one of the handhelds,( VX6-R ) but it has aviation intermod on 137 along with some other kind of Local burst data type interference, perhaps pagers or something. Although it receives it, its Not the best receiver for it in my humble opinion; though , I wish it was. Do folks typically get prompt answers from yaesu? I think I asked them a question once before and got an answer fairly quickly .. Wasn't meaning to bash them ... Just a lil frustrated with no answer .. But thanks for checking that out Tim.. I will probably just get that hamtronics receiver and be done with it. Thanks everyone .. Your're the greatest !! Randy - N2CUA PS. QST QST KB9QHO or K9CIS , I will be on VO52, 1420UTC pass FN23 ..;-) Lol -----Original Message----- From: Tim - N3TL [mailto:n3tl@bellsouth.net] Sent: Thursday, October 29, 2009 8:10 AM To: RSwart1(a)twcny.rr.com Subject: Re: [amsat-bb] FT-897D - WFM HI Randy, The anawer - straight from Yaesu's tech department - is no. For the record, my history of communication with Yaesu has been excellent. Please let me know off the board if you do NOT get a timely answer from them. Neither the FT-897 nor the FT-857 will operate in wide FM on the amateur bands. Neither will the FT-817ND. It's seems strange to me because their handhelds will go into Wide FM for use with the weather satellites in the 137 mHz band. I'm sorry I don't have a better answer. 73, Tim - N3TL ________________________________ From: Randy <RSwart1(a)twcny.rr.com> To: amsat-bb(a)amsat.org Sent: Wednesday, October 28, 2009 10:31:11 PM Subject: [amsat-bb] FT-897D - WFM If I have asked this question previously, I apologize. ( getting old sucks sometimes hi hi ) I would like to know if any of the radio guru's out there Know of a way to persuade my 897D to receive in WFM on 137 Mhz? The only place it does that now is on the FM Broadcast band .. I would R E A L L Y like to do this .. I emailed yaesu with the question .. ( I bet we all know the result of that ) Thanks in advance .. And a special thanks to Mike and Tim for helping me so much on The satellite stuff .. Been working CW and SSB on VO-52 simplex ..and Its going great .. Was quite the lil learning curve though. Now I just Need some a better antenna system, preamp and duplexer. Randy - N2CUA _______________________________________________ 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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Stealth Satellite Station?
by Tim Goodrich 29 Oct '09

29 Oct '09

Build a 2m and 70cm Quadrifilar Helix- they'll give you coverage virtually horizon to horizon. Stick them on the roof by using a number of hose clamps to attach the PVC mast to one of the roof's metal plumbing vent pipes (not a gas exhaust or anything with hot air). Low profile, completely temporary, and good coverage. Tim KI6VBY

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FT-897D - WFM
by Tim Goodrich 29 Oct '09

29 Oct '09

Would like to know the how to do WFM for 137Mhz on the 817 as well, if its possible. Tim KI6VBY

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ARES 1-X 10 0n 10 launch
by Luc Leblanc 29 Oct '09

29 Oct '09

I just review my DVD recording of the ARES 1-X launch, what a spectacular launch for the tallest rocket in the world. It was amazing to see how in 3 years this rocket pass from a paper sheet to a 300 foot rocket. But it could be the first and the last launch for this amazing 450 millions rocket project. It make's me remember the numerous AMSAT-NA post AO-40 failed project. I now know why and how things evoluate from the 1960 Redstone/Atlas and Mercury project failed launches to this brilliant ARES 1-X success... a 500 Hockey mark. The human factor and knowledge! experience came last as it's often just to confirm the process of bad decisions. Will ARES 1-X survive? It can at least be a wonderful amateur radio satellite launch opportunity but for this it take's will and leadership! A very hard to find resources when ITAR is so easy to invoke... "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE

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FT-897D - WFM
by Randy 28 Oct '09

28 Oct '09

If I have asked this question previously, I apologize. ( getting old sucks sometimes hi hi ) I would like to know if any of the radio guru's out there Know of a way to persuade my 897D to receive in WFM on 137 Mhz? The only place it does that now is on the FM Broadcast band .. I would R E A L L Y like to do this .. I emailed yaesu with the question .. ( I bet we all know the result of that ) Thanks in advance .. And a special thanks to Mike and Tim for helping me so much on The satellite stuff .. Been working CW and SSB on VO-52 simplex ..and Its going great .. Was quite the lil learning curve though. Now I just Need some a better antenna system, preamp and duplexer. Randy - N2CUA

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Re: Hopefully - Some ITAR Clarifications.
by Tony Langdon 28 Oct '09

28 Oct '09

At 08:37 AM 10/27/2009, Samudra Haque wrote: >Yes, I usually take care to divide my correspondence amongst the >particular groups I am working with, and this is also the basis in >which I recently proposed moving to (a) moderated forum (such as >phpBB) or (b) sub-dividing the amsat-bb list into amsat-engineering If AMSAT goes to a forum, I'm out of here, I can't cope with the volume of messages on a forum, much easier in email. Email lists can be moderated too, but the separation might be a good way to simplify ITAR compliance. 73 de VK3JED / VK3IRL http://vkradio.com

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using a microsat as a potential high altitude VHF reflector
by Samudra Haque 28 Oct '09

28 Oct '09

Hi all, I read with interest an article on the web "ECHO - America's First Communications Satellite" By John R. Pierce which is available here: http://www.smecc.org/john_pierce___echoredo.htm I know ham radio operators love using their hand helds to communicate using active transponders or active repeaters in space... no issue with that. were there any ham radio projects (either through amsat-na or abroad) that implemented a passive reflector on an orbital vehicle like Project Echo I quote from http://www.satmagazine.com/cgi-bin/display_article.cgi?number=490218137 The Echo-1 Balloon Satellite as it sits, fully inflated, at a Navy hangar in Weeksville, North Carolina. The spacecraft measured 100 feet across when deployed, and was nicknamed a ‘satelloon’ by those involved in the project. The mylar film balloon acted as a passive communications reflector for transcontinental and intercontinental telephone (voice), radio and television signals. Echo 1 re-entered the atmosphere May 24, 1968. What strikes me is the implications of a large large very large antenna (reflector), if only it could be reflective on one side of the sphere only .... (any ideas?) The Echo 2 was a 135-foot rigidized inflatable balloon satellite. The satellite is shown undergoing tensile stress test in a dirigible hanger at Weekesville. The satellite, 50 times more rigidized than Echo I. When folded, the satellite is packed into the 41-inch diameter canister shown in the foreground. Did early amsat folks consider duplicating / adding to any of these projects or launch their own 'satelloon' that did not carry an active RF payload ? Could we outfit one of our future microsats to provide a reflector to aid in Earth-LEO DXing like meteor-scatter ? 73 de Samudra, N3RDX

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Centerfire Yagi antennas
by Michael Tondee 28 Oct '09

28 Oct '09

Anyone had any experience with these? http://www.centerfireantenna.com/vhf2myagi.html They look to be a good buy and I was thinking of maybe getting one for LEO use. 73, Michael, W4HIJ

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Survey: Top 250 grids
by Jeff Yanko 28 Oct '09

28 Oct '09

Hi all! After recently working a number of rare grids activated by our fellow satellite ops, (again THANK YOU!!) I've been looking over the grid map and wondered what grids are most needed. I, like most, have grids that others may dream of working and confirming and vice versa. Then, there are those grids that are so common, most everybody has worked and confirmed them. Since there are no HEO's and only the FM birds with a couple of linear birds, this survey will be focused on the North American area. I am undertaking a task to get a better reading on what grids are "outstanding" in need of activation. I am looking at obtaining the top 25 grids from the predominately 10 grid fields covering the U.S., Canada and Mexico, for the total of 250 grids. Yes, most of these grids will be in the U.S., however, I'm sure there will be some mention of VE and XE grids as well. What I would like everybody to do is take some time and look at your grid map and write down 25 grids from each of the grid fields that cover the U.S., Canada and Mexico. Those grid fields are: CN, DN, EN, FN, CM, DM, EM, FM, DL, EL. If you don't need at least 25 grids from a particular grid field, no problem, just enter those you still need. Example. Let's say you only need three grids from DM, they are DM74, 75, 76. Just enter those three. To make things simple and easy I will give an example of how the data can be entered and e-mailed to me. Here is an example. CN 79, 82, 93, 95, 99 DN 02, 03, 07, 13, 15, 17, 19, 22, 24, 25, 34, 37, 38 As you can see, it's relatively easy, and very easy if you've kept up on your grid map. :) A couple of notices. 1. Please, do not send any "water grids" since any operation from them is sporadic and most cases, impracticle to activate for most of us. 2. Please send your data to me via e-mail, attaching it to this e-mail will be fine. The cutoff date is November 14, 2009. This will give all plenty of time to look over their maps and data. Questions, comments or just sending the data, please send an e-mail. Looking forward to receiving your replies! 73, Jeff WB3JFS Las Vegas, NV DM26

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Re: FS item (Arrow)
by Mark L. Hammond 28 Oct '09

28 Oct '09

The PCR-1000 and the UT-10 L-band module have been sold. The Arrow antenna is still available! Keep in mind the current new/retail price for this antenna is $139 (plus shipping). That makes this one "better than new" ;-) 1) Arrow II Antenna 146/437-10WBP Satellite version with built-in diplexer and split boom. Condition: nearly new, only assembled about 5 times. Elements/boom neatly numbered via label-maker tape. $100 + shipping/insurance. 73, Mark N8MH >>Date: Mon, 26 Oct 2009 15:51:50 -0400 >>Delivered-To: marklhammond(a)gmail.com >>Subject: FS items (Arrow, PCR-1000, 1.2 GHz module for TS-790). >>From: "Mark L. Hammond" <marklhammond(a)gmail.com> >>To: amsat-bb(a)amsat.org >> >>Hello AMSAT-BB, >> >>I need to pursue a tower/rotor/antenna project. Therefore, I am >>selling some items in the shack to help fund the project. The prices >>are "fair" and therefore "firm". I'm giving the BB a shot before I >>take these to a local hamfest or eBay. Prices do not include >>shipping/insurance. >> >> >> >>SOLD 2) Icom PCR-1000 receiver. Includes receiver, serial cable, and >>power supply. Condition: few minor scuffs/scratches, perfect working >>condition. (The variable bandwidth permits reception of 38k4 packet >>signals!) $250 + shipping/insurance. >> >>SOLD 3) UT-10 1.2 GHz L-band module for Kenwood TS-790. This is a >>plug-n-play module, about a 5-10 min. no-tuning install. Includes >>screws. Condition: Perfect working order, low transmit time, full >>10W output. Price: $475 + shipping/insurance. >> >>Please contact me directly offlist at: marklhammond AT gmail DOT com >> Mark L. Hammond [N8MH]

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W6FOG Schedule
by w6zkh＠comcast.net 28 Oct '09

28 Oct '09

Talk to Neal, W6FOG on the 2225z pass of AO-27, and he advised me he will be leaving San Francisco Bay on Friday, Oct 30th, hoping for 4 good days for a sail to La Paz, Mexico. So, starting that date, be on the lookout for him out in the water. John W6ZKH

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Sat status update
by Andrew Rich 28 Oct '09

28 Oct '09

Hello I have tidied things up a bit and added a graph for ISS Please let me know if you would like to see a satellite added http://vk4tec.no-ip.org/sat_status/ Andrew VK4TEC

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AO-51 S band will be off 2235-2250 10/28
by Andrew Glasbrenner 28 Oct '09

28 Oct '09

AO-51 S band will be off 2235-2250 10/28 for some telemetry collection on 435.150. 73, Drew KO4MA

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Re: Portable satellite terminals for disaster relief
by Daniel Schultz 28 Oct '09

28 Oct '09

JoAnne Maenpaa, K9JKM, wrote: >I guess you're observing that AMSAT's GEO proposal has to fit into the GEO satellite commodity market. Should Amsat be working with NetHope to design a better terminal? How do we work with these guys to convince them that they should be using a ham satellite instead of a commercial service? One big advantage of the commercial service is that it exists now. How do we get the money from funding agencies, either government, corporate, or non-profit? Where does Amsat fit in to this world? Have they even heard of us, our history and our capabilities? >I've maintained that a GEO satellite is best suited to link widely deployed sectors of the Incident Command System. I think most government-based emergency authorities are not going to be interested in building or funding a system that they do not design and control. They consider amateur radio to be a last-ditch thing that they would rather not count on, they would rather have an in-house system that fits in to their chain of command and shows their funding authorities that they are fully on top of emergency communications and don't need to rely on amateur volunteers coming forward in time of need. A non-governmental organization like NetHope might be more receptive to our proposals. We need to think hard and come up with new ideas. Dan Schultz N8FGV

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Cute competition winners
by John Heath 28 Oct '09

28 Oct '09

Cute Re-entry Competition Winners Declared It seems that when a satellites, reache an altitude as low as about 170km they will be down very quickly. According to Space Track elements, and InstanTrak tracking software Cute was still orbiting when the perigee was below 150 Km. My theory is that cubesats stay in orbit longer because they have a large mass relative to their very small cross section and so experience far drag than bulkier objects. Using that idea I ran the last element set for several orbits and made an arbitrary decision that re-entry probably took place at a perigee of 130Km or so thus putting re-entry pretty much dead centre between two competition entries. I therefore declare Ib OZ1MY and David G0MRF as joint winners !!! On receipt of current postal addresses I will mail out a patch kit to each of the lucky winners. Thanks to Ib, David and everyone else who took part, it was fun to plot the curves and I learned a bit about atmospheric density and solar flux. 73 John G7HIA PS IPS Radio and Space Services, have a useful paper on satellite orbital decay calculations. Thanks to Ken GW1FKY for sending me a copy.

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Re: requesting help on a RF link solution (imaginary ka-bandlink!)
by i8cvs 28 Oct '09

28 Oct '09

Hi Bob, W7LRD I need to answere your question as well via AMSAT-BB because my emails sent to w7lrd(a)comcast.net are alwais rejected to me by your provider. From the point of view of Amateur Radio the best I can suggest to you is the book " The Satellite Experimenters Handbook " by Martin Davidoff K2UBC 2nd Edition ARRL Order No 3185 ISBN 0-87259-318-5 and also the ARRL " UHF MICROWAVE Experimenters's Manual" ARRL Order No 3126 ISBN 0-87259-312-6 Those books are full of easy calculations and you can follow it using a small scientific hand held calculator but very important every chapter of the UHF MICROWAVE Experimenter's Manual is full of "References and Bibliography " that you can find and read/study to go deeply into details on the above matter covering circuits and antennas which are described here in hardware but also with related easy to follow calculations. At the beginning you must go slowly with the above two books but after a few months you will improve and the above matter will come very familiar to you provided that you implement your knoledge following the recommended References and Bibliography. In AMSAT-BB I follow your experimental activity particularly into the S band.............congrats ! Best 73" de i8CVS Domenico ----- Original Message ----- From: Bob- W7LRD To: i8cvs Sent: Wednesday, October 28, 2009 3:23 AM Subject: Re: [amsat-bb] Re: requesting help on a RF link solution (imaginary ka-bandlink!) Hello Domenico I enjoy your posts, even though many are "out of my pay grade". Would you aim me towards a good tutorial place you may know of where I could learn some of the basics. I would like to gain a better understanding of this concept. Thanks & 73 Bob W7LRD ----- Original Message ----- From: "i8cvs" <domenico.i8cvs(a)tin.it> To: "Samudra Haque" <samudra.haque(a)gmail.com>, "Amsat-bb" <amsat-bb(a)amsat.org> Sent: Tuesday, October 27, 2009 5:44:14 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Re: requesting help on a RF link solution (imaginary ka-bandlink!) ----- Original Message ----- From: "Samudra Haque" <samudra.haque(a)gmail.com> To: "Amsat-bb" <amsat-bb(a)amsat.org> Sent: Tuesday, October 27, 2009 11:03 AM Subject: [amsat-bb] requesting help on a RF link solution (imaginary ka-bandlink!) > Hi, amsat-bb > > CQ any satellite link budget expert ! > > I'm trying to do a calculation on my own based upon published specs > for the NASA MRO Ka-band experiment, but am getting some unexpected > results for a Ka-band simplex link with Temp=3000K (hypothetical), > operating with a Signal to Noise ratio (unitless) figure of 1.171 > (representing 4.5 dB eb/no with a data rate of 1 Gbps and a bandwidth > of 2.4x10^9 Hz) > > Question : is 1 gbps not 1x10^9 bps ? > > Question : if both antennas are 3m parabolic (both are the same type) > with 56.4 dBi boresight gain, what would you think the furthest > distance the link can perform with SNR of 1.171. I have actually used > a padding of 3 dB Eb/No in my link budget, so am not worried about any > further signal loss at first (ok, I should be ..) For the exercise, I > am choosing a 10 Watt estimated output on an arbitrary basis. > > So: > > P_t = 10W > > G_t = 56.4 dBi = G_r , can we assume the same gain for TX and RX on a > parabolic dish ? > > T = 3000K at receiver > > SNR = 1.171 required > > f=32.2 GHz > > B = 2.4E9 Hz, (bpsk, ldpc code 0.5) > > DR = 1E9 bps > > So, I am puzzled why this link budget says the range with these > parameters is equal to 4.644 x 10^9 Km -- that seems to be a long > distance ! What am I not able to conceptualize. > > BTW, I know if I send this out, the answer will come to me soon > thereafter, but for education, I would like to know where the problem > in my understanding lies ! > > Samudra N3RDX Hi Samudra, N3RDX If I well understand your question is to know what is the maximum free space distance at which you can get a S/N ratio of 4.5 dB using two identical transmitting and receiving systems having the following characteristics: 1) Antenna gain for TX and RX = 56.4 dBi at 32.2 GHz 2) Frequency = 32.2 GHz 3) Overall receiving system noise temperature: T = 3000 kelvin 4) Bandwidth of receiving system = 2.4 x 10^9 Hz 5) TX power 10 W 6) Required Signal to Noise ratio S/N at the unknown distance = 4.5 dB With the above data we first calculate the receiver noise floor Pn = KTB where: K = Boltzmann constant = 1.38 x 10^ -23 (Joule/kelvin) T = Overall System Noise Temperature = 3000 kelvin B = Bandwidth of receiving system = 2.4 x 10^9 Hz Working out the numbers we get the following RX noise floor Pn = (1.38 x 10^ -23) x (3000) x (2.4 x 10^9) = 1 x 10^-10 watt and 10 x [ log (1 x 10^-10)] = - 100 dBW or - 70 dBm 10 Link budged calculation TX power = 10 W =..................+ 40 dBm TX antenna gain ........................+ 56.4 dBi ------------ Transmitted EIRP......................+ 96.4 dBm Free space attenuation for 61.000 km at 32.2 GHz............- 218.3 dB ------------ Received power over isotropic ant. at 61.000 km distance........- 121.9 dBm RX antenna gain.......................+56.4 dB ------------- Received power at RX input... - 65.5 dBm Receiver noise floor.................- 70.0 dBm -------------- Received S/N Ratio................. + 4.5 dB Conclusion: Using two boresight identical parabolic dishes having each a gain of 56.4 dBi at 32.2 GHz one transmitting with 10 watt and the other one receiving with a receiving system having a noise temperature of 3000 kelvin into a bandwidth = 2.4 x 10^9 Hz the free space distance at which the signal is received with a S/N ratio = + 4.5 dB is only 61.000 km so that your hypothetical system is not suitable for the NASA MRO Ka-band experiment because the distance Earth to Mars is about 1 AU i.e. 1 Astronomical Unit corresponding to 149 Million/ km 73" de i8CVS Domenico _______________________________________________ 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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Re Which rotator control to use.
by howard dawson 28 Oct '09

28 Oct '09

Hi Eric. I have been using Fodtrack along with F6DQM's (Gabriel Rivat) excellent programme Sat_Explorer for over a year now, with no trouble whatsoever, Fodtrack was home built a long time ago in the days of KO-23, UO22 etc and has never given any trouble. Gabriels programme SAT_Explorer can be downloaded free of charge from his excellent web site http.//www.f6dqm.fr, it is very easy to set up and runs perfectly. Best of luck. 73 Howard G0VBT Amsat 6058 Send instant messages to your online friends http://uk.messenger.yahoo.com

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Diamond Yagis
by John Geiger 28 Oct '09

28 Oct '09

Has anyone tried out the Diamond 2m or 70cm yagis? If so, do they do a pretty good job? They sure are priced nice. I am especially interested in the A430S15 15 element UHF yagi model. 73s John AA5JG

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Nova Satellite Prediction Program
by Jimcknwire＠aol.com 28 Oct '09

28 Oct '09

Installed, reinstalled, changed versions- multiple problems with calculating scripts. What program should I change to?

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PIC rotator control
by Andrew Rich 28 Oct '09

28 Oct '09

Hello I am re-visting a rotator controller. I am curious, should I push the processing of the "compare and make a decision" onto the PIC, or pull that function back into the PC ? PC is LINUX I/O is serial PIC is 16F877 Andrew VK4TEC

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requesting help on a RF link solution (imaginary ka-band link!)
by Samudra Haque 27 Oct '09

27 Oct '09

Hi, amsat-bb CQ any satellite link budget expert ! I'm trying to do a calculation on my own based upon published specs for the NASA MRO Ka-band experiment, but am getting some unexpected results for a Ka-band simplex link with Temp=3000K (hypothetical), operating with a Signal to Noise ratio (unitless) figure of 1.171 (representing 4.5 dB eb/no with a data rate of 1 Gbps and a bandwidth of 2.4x10^9 Hz) Question : is 1 gbps not 1x10^9 bps ? Question : if both antennas are 3m parabolic (both are the same type) with 56.4 dBi boresight gain, what would you think the furthest distance the link can perform with SNR of 1.171. I have actually used a padding of 3 dB Eb/No in my link budget, so am not worried about any further signal loss at first (ok, I should be ..) For the exercise, I am choosing a 10 Watt estimated output on an arbitrary basis. So: P_t = 10W G_t = 56.4 dBi = G_r , can we assume the same gain for TX and RX on a parabolic dish ? T = 3000K at receiver SNR = 1.171 required f=32.2 GHz B = 2.4E9 Hz, (bpsk, ldpc code 0.5) DR = 1E9 bps So, I am puzzled why this link budget says the range with these parameters is equal to 4.644 x 10^9 Km -- that seems to be a long distance ! What am I not able to conceptualize. BTW, I know if I send this out, the answer will come to me soon thereafter, but for education, I would like to know where the problem in my understanding lies ! Samudra N3RDX

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Re: FS items (Arrow, PCR-1000)
by Mark L. Hammond 27 Oct '09

27 Oct '09

The UT-10 L-band module has been sold. Thanks for the interest. The Arrow antenna and the PCR-1000 are still available! 73, Mark N8MH >Date: Mon, 26 Oct 2009 15:51:50 -0400 >Delivered-To: marklhammond(a)gmail.com >Subject: FS items (Arrow, PCR-1000, 1.2 GHz module for TS-790). >From: "Mark L. Hammond" <marklhammond(a)gmail.com> >To: amsat-bb(a)amsat.org > >Hello AMSAT-BB, > >I need to pursue a tower/rotor/antenna project. Therefore, I am >selling some items in the shack to help fund the project. The prices >are "fair" and therefore "firm". I'm giving the BB a shot before I >take these to a local hamfest or eBay. Prices do not include >shipping/insurance. > >1) Arrow II Antenna 146/437-10WBP Satellite version with built-in >diplexer and split boom. Condition: nearly new, only assembled about >5 times. Elements/boom neatly numbered via label-maker tape. $100 + >shipping/insurance. > >2) Icom PCR-1000 receiver. Includes receiver, serial cable, and >power supply. Condition: few minor scuffs/scratches, perfect working >condition. (The variable bandwidth permits reception of 38k4 packet >signals!) $250 + shipping/insurance. > >SOLD 3) UT-10 1.2 GHz L-band module for Kenwood TS-790. This is a >plug-n-play module, about a 5-10 min. no-tuning install. Includes >screws. Condition: Perfect working order, low transmit time, full >10W output. Price: $475 + shipping/insurance. > >Please contact me directly offlist at: marklhammond AT gmail DOT com > > >73, >-- >Mark L. Hammond [N8MH] Mark L. Hammond [N8MH]

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SatPC32, Yaesu FT-736, and KCT
by Jim Bennett 27 Oct '09

27 Oct '09

Has anyone got this configuration working? My current setup is: Yaesu FT-736, WISP, Kansas City Tracker/Tuner with Yaesu 5400 rotor control box. I have try to use Satpc32 with the KCT and it will interface with the rotor control, but will not tune the radio. Do I need a separate cable for the data link? Or will Satpc32 interface with KTC and tune thru the KTC board? Thanks for any info. Jim KE4KOL

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Ares
by rwmcgwier＠gmail.com 27 Oct '09

27 Oct '09

Launch at 9:49 am edt Sent from my Verizon Wireless BlackBerry

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Plan 13 in Python
by Mark VandeWettering 27 Oct '09

27 Oct '09

Bruce's recent experiments with the AVR port of Plan 13 has reminded me that I should make a public release of my Python implementation. I keep thinking that I am going to get to making improvements, but somehow I never seem to get around to do doing it, so rather than just delaying, I'll toss it out in its current state and let people experiment with it. It currently includes a plan 13 module, a module for converting maidenhead grid squares and a couple of example scripts (most notably an "elements" script, for fetching elements, and a "nextpass" script that can be used to find details of the next pass of a satellite, mostly useful for LEO sats, but which illustrate the use of the plan 13 module). Feel free to download and use this code for your own experimentation: it's under an open source license whose only significant feature is to acknowledge Miller's original Plan13 code. The code runs under Python 2.5, and can be found at: http://brainwagon.com/files/pyham-0.1.tar.gz I'd be interested in hearing of any adaptations, extensions or uses of this code. 73 Mark K6HX

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