[amsat-bb] TNX for the help for the demo
A big thanks for the help in the demo to the middle school yesterday. You had 20 kids excited. Next step is to get them licensed and the using there radios. nick -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Nick Pugh K5QXJ Sent: Thursday, September 15, 2011 3:14 AM To: amsat-bb@amsat.org Subject: [amsat-bb] (no subject) Hi AMSATERS The kids at Paul Breaux Middle School in Lafayette, La are forming a school radio club. Their first meeting will be at 10:20 AM CDT Thursday September 15th. If you could tune in on EchoLink node 370324 (the 146.82 W5DDL repeater) at 10:30 for a quick demo it would be helpful. The younger you are the more the kids will identify with you, but old guys like myself it is O.K. If you can meet us on the air pleas reply to this email. Thanks nick Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School ___ Sent via AMSAT-BB@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 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Which Mobile Mag Mount?
I'm thinking maybe putting a mag mount with 19.5 of nice shiny wire on a pizza pan would do as well as the Arrow.. The pizza pan is assumed to be the size of your car roof to get the full gain of the 3/4 wave vertical. Also, if you have the arrow, then you can more than double your contact time because you can point it low on the horizon. The 19.5 whip in the center of your car roof is the no-muss-no-fuss approach, for operating while mobile, but it does not compare to having a good beam. Bob, Wb4APR 73, Ted, K7TRK -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Bob Bruninga Sent: Thursday, September 15, 2011 8:52 AM To: 'AMSAT BB' Subject: [amsat-bb] Re: Which Mobile Mag Mount? Everyone's comments are correct and valid within their context. But the original question was optimizing for the casual mobile operator in motion. So here are some additional considerations... Second, any vertical antenna...will have a [null overhead] So, think about it: A GREAT pass of 90 degrees goes overhead your vertical is valueless during the middle of that great pass. True, but when we put some actual numbers on that, the loss is quite insignificant. Using AO51, only one pass every 5 days goes above 82 degrees, and the total duration above 82 degrees is 24 seconds, out of all in view times. So we agree, the antenna is valueless, but for under 1% of the time. The tradeoff is that it is 3 dB better most of the rest of the time... The measured elevation profile of a 3/4 wave vertical (a 19.5 whip on the 435 downlink) is shown 80% down the page http://aprs.org/astars.html. The overhead null is only 10 dB down at 82 degrees... BUT the satellite is 10 dB closer at that point, so you still hear it almost the same as when it came above 25 degrees. So you get full sky coverage above 25 degrees 99% of the time with the vertical. Ideally - in a car - ... stopping and parking and getting a vertical perpendicular to the orbit of the satellite would give best results. Then maybe a Larsen mag mount... And bend - er, I mean, re-form that whip right at the base so that it is about 20 bent. you'll be more successful with the FM birds! Yes, good idea, but now there is some directionality and so the car needs to remain pointed towards the satellite during the pass. Otherwise there is still the null, it is just in a different part of the sky. 1. If the satellite is circular polarization the 19.5 whip looses 3 dB of gain. Yes, but most people have observed a polarization shift during overhead passes. And in that case, the loss of a circularized antenna is much worse than 3 dB... usually a complete fade. SO I agree, a circular antenna gets 3 dB better half the time, and much worse the other half the time. I prefer the simplicity of the whip that does not give up more than 3dB no matter what the polarization is. Mounting a quadrifilar on the roof of the mobile is also problematic. 2. The common Quadrifilar Antenna is 1/2 wave 1/2 turn. The 1 wavelength, 1 turn Quadrifilar Antenna has its highest gain near or at the horizon depending on the length to diameter ratio. But it is still only a 3 dB gain antenna out there, and so it is not going to hear the satellite down on the horizon anyway because the satellite is 10 dB farther away and usually blocked for the mobile. So having gain on the horizon for a mobile omni antenna is wasted. It either is not enough or it creats additional nulls higher up. Better to move that gain higher up but smooth where the satellite is closer and then have good contacts, than waste gain where it is already insufficient or problematic. Just different perspectives, but the devil is in the details... Bob, Wb4APR ___ Sent via AMSAT-BB@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 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Which Mobile Mag Mount?
I just can't figure out the best way to hold the radio By all means, you hold the radio to whatever works best. That is a MANY dB advanatage over fixed antnenas, because the human ear-hand-feedback system can respond in fractions of a second to always maintain the best signal at any instant to match the instantaneous polarization of the satelite. No mechanical mounting can do that. Bob -Original Message- From: Ted [mailto:k7trkra...@charter.net] Sent: Thursday, September 15, 2011 7:41 PM To: 'Bob Bruninga'; 'AMSAT BB' Subject: RE: [amsat-bb] Re: Which Mobile Mag Mount? Bob, thanks for the great data. Question: do you think your data/techniques have any application to using a dual band HT with a long whip (e.g. Diamond SRH77CA - 15.5long) In other words would you be better off just holding the HT vertical and fairly stationary during the pass (adjusting Doppler of course) or moving the darn thing all over until you capture the bird. I realize it is not duplex, etc. but it does seem to work on a strong pass. I just can't figure out the best way to hold the radio Thanks for any help 73, Ted, K7TRK -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Bob Bruninga Sent: Thursday, September 15, 2011 8:52 AM To: 'AMSAT BB' Subject: [amsat-bb] Re: Which Mobile Mag Mount? Everyone's comments are correct and valid within their context. But the original question was optimizing for the casual mobile operator in motion. So here are some additional considerations... Second, any vertical antenna...will have a [null overhead] So, think about it: A GREAT pass of 90 degrees goes overhead your vertical is valueless during the middle of that great pass. True, but when we put some actual numbers on that, the loss is quite insignificant. Using AO51, only one pass every 5 days goes above 82 degrees, and the total duration above 82 degrees is 24 seconds, out of all in view times. So we agree, the antenna is valueless, but for under 1% of the time. The tradeoff is that it is 3 dB better most of the rest of the time... The measured elevation profile of a 3/4 wave vertical (a 19.5 whip on the 435 downlink) is shown 80% down the page http://aprs.org/astars.html. The overhead null is only 10 dB down at 82 degrees... BUT the satellite is 10 dB closer at that point, so you still hear it almost the same as when it came above 25 degrees. So you get full sky coverage above 25 degrees 99% of the time with the vertical. Ideally - in a car - ... stopping and parking and getting a vertical perpendicular to the orbit of the satellite would give best results. Then maybe a Larsen mag mount... And bend - er, I mean, re-form that whip right at the base so that it is about 20 bent. you'll be more successful with the FM birds! Yes, good idea, but now there is some directionality and so the car needs to remain pointed towards the satellite during the pass. Otherwise there is still the null, it is just in a different part of the sky. 1. If the satellite is circular polarization the 19.5 whip looses 3 dB of gain. Yes, but most people have observed a polarization shift during overhead passes. And in that case, the loss of a circularized antenna is much worse than 3 dB... usually a complete fade. SO I agree, a circular antenna gets 3 dB better half the time, and much worse the other half the time. I prefer the simplicity of the whip that does not give up more than 3dB no matter what the polarization is. Mounting a quadrifilar on the roof of the mobile is also problematic. 2. The common Quadrifilar Antenna is 1/2 wave 1/2 turn. The 1 wavelength, 1 turn Quadrifilar Antenna has its highest gain near or at the horizon depending on the length to diameter ratio. But it is still only a 3 dB gain antenna out there, and so it is not going to hear the satellite down on the horizon anyway because the satellite is 10 dB farther away and usually blocked for the mobile. So having gain on the horizon for a mobile omni antenna is wasted. It either is not enough or it creats additional nulls higher up. Better to move that gain higher up but smooth where the satellite is closer and then have good contacts, than waste gain where it is already insufficient or problematic. Just different perspectives, but the devil is in the details... Bob, Wb4APR ___ Sent via AMSAT-BB@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 ___ Sent via AMSAT-BB@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
[amsat-bb] Sat Demonstration from University of Cienfuegos
Hello Guys � Thanks very much for attended at my call from the University during the Satellite Demonstration. It was a great experience and inspiration for students and teachers in the Physics class. They saw the Doppler effects in a very practical way, remembered the Kleper Theories and the rotation of Faraday. �They were very curious and interested with the AMSAT and our hobby in general. � Thanks also to allow me the contact with K8BL/VE1 from my portable conditions. � I havenrsquo;t had the opportunity to say thanks until now; because of, I havenrsquo;t had email service. � 73! � Thanks again � Hector, CO6CBF � EL92 � *** Genius is one per cent inspiration, and ninety-nine per cent perspiration. -- Thomas A. Edison *** --- Free the Cuban Five! http://www.injusticia.cubaweb.cu/, http://www.antiterroristas.cu/ Participe en Universidad 2012, del 13 al 17 de febrero de 2012. Habana, Cuba. http://www.congresouniversidad.cu/ Consulte la Enciclopedia Colaborativa Cubana: http://www.ecured.cu/___ Sent via AMSAT-BB@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
[amsat-bb] ANS259 Special
SB SAT @ AMSAT $ANS-259.01 BOD Election Results AMSAT News Service Bulletin 259.01 From AMSAT HQ SILVER SPRING, MD. September 16, 2011 To All RADIO AMATEURS BID: $ANS-259.01 The 2011 AMSAT-NA Board of Directors election has been completed with the following results: Barry Baines, WD4ASW- 576 Tony Monteiro, AA2TX - 560 Alan Biddle, WA4SCA - 516 Drew Glasbrenner, KO4MA - 418 Mark Hammond, N8MH - 319 First Alternate Patrick Stoddard, WD9EWK - 275 Second Alternate Steve Coy, K8UD - 229 A total of 751 ballots were received In accordance with the Bylaws of AMSAT-NA those receiving the four highest number of votes are elected as regular members of the Board of Directors for the next 2 years. The alternates will serve for one year until the next election. Congratulations to those that were elected and willing to serve the AMSAT-NA Group. [Thanks to AMSAT HQ for this information] /EX Dee Interdonato, NB2F This week's ANS Editor Nb2f at amsat dot org ___ Sent via AMSAT-BB@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
[amsat-bb] AMSAT Election Results
THANK YOU to all of you for tossing your hats into this election process. Barry Baines, WD4ASW- 576 Tony Monteiro, AA2TX - 560 Alan Biddle, WA4SCA - 516 Drew Glasbrenner, KO4MA - 418 Mark Hammond, N8MH - 319 First Alternate Patrick Stoddard, WD9EWK - 275 Second Alternate Steve Coy, K8UD - 229 AMSAT-NA is in good hands. Clint Bradford, K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] Gating Satellite Passes to local APRS RF
Dear All, I am running an APRS iGate on 2M locally using UI-View32, AGWPE and a KPC-9612+ TNC (callsign 9M4GQC). I wonder if it would be possible to add the capability of sending live satellite passes as objects to the local APRS RF (not the Internet) network so as to alert local users when a satellite passes over our area. Would be also great if we could add the frequency information so that Kenwood and Yaesu APRS users can directly QSY to the satellite's frequency. Tried to look up the net but could not find any articles or software to do do. Any pointers are much welcome and appreciated. Thank you. 73, Sion Chow Q. C., 9M2CQC, Also: WQ2C /HL1, 9V1QC, JG1XHM, ex: 9W2QC, AB3IO ___ Sent via AMSAT-BB@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
[amsat-bb] K8BL/W1 FN55 Saturday Afternoon
Bob, K8BL, will be heading back from Nova Scotia Saturday and will stop somewhere in FN55 during the afternoon. He could work an AO-27 or an AO-51 pass. This grid is pretty rare so try not to miss him. 73, John K8YSe ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Gating Satellite Passes to local APRS RF
Thanks for the reply. Yes I saw Bob's page using a separate PM function of the TM-D700 to do it, but will be great if there are some automatic methods available. 73, Sion, 9M2CQC On 17 Sep 2011, at 01:25 AM, Len Revelle len...@gmail.com wrote: WB4APR had some info on doing this with the TM-D700 on one of his pages. I have a PM in mine set to do so and try to set it while I am at work. On Fri, Sep 16, 2011 at 11:03 AM, Sion Chow Q. C. 9w...@9w2qc.net wrote: Dear All, I am running an APRS iGate on 2M locally using UI-View32, AGWPE and a KPC-9612+ TNC (callsign 9M4GQC). I wonder if it would be possible to add the capability of sending live satellite passes as objects to the local APRS RF (not the Internet) network so as to alert local users when a satellite passes over our area. Would be also great if we could add the frequency information so that Kenwood and Yaesu APRS users can directly QSY to the satellite's frequency. Tried to look up the net but could not find any articles or software to do do. Any pointers are much welcome and appreciated. Thank you. 73, Sion Chow Q. C., 9M2CQC, Also: WQ2C /HL1, 9V1QC, JG1XHM, ex: 9W2QC, AB3IO ___ Sent via AMSAT-BB@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 -- Len Revelle N9IJ ___ Sent via AMSAT-BB@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
[amsat-bb] DN 00,10,11,20,21
Ok looks like this Sun, Mon for the DN grids. Like I said before I am not going to try and make a schedual, just know that it IS happening for sure This Sun, Mon. DN00 will be on the early Sun morning passes followed by DN 10,11. I will hit those on the way back so more people get a chance on those. All of Sun Mon will be DN20,21. I bought a duplexer for the 857 and will be trying the SSB birds. If you hear me please talk long enough for me to tune you in, hopefully some of you will have the patience to work with me. I am sure after making a couple contacts I will get the hang of it. Kevin KF7MYK ___ Sent via AMSAT-BB@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
[amsat-bb] gridpedition to EL39
Tnx to all who worked me in EL39 yesterday (Thursday January 15 2011) during the 1918Z pass (pass 93,712) of AO-27. This was from the same location at a camp (yeah, right--a camp. A three story beautiful home. Some camp! Same location I wrote about in the Journal some months ago!) I logged: KC0YBM W5PFG KF5LOQ K8TL AC0RA K4MOA N0JE AA4QE K8YSE XE1AO K4FEG WC7V K3EMS If I missed logging you, I will listen to the tape tomorrow for good contacts that were not written in the log. If any of you needs the card from EL39 yesterday, let me know by return e-mail and I will be happy to send you a card. No sase. Chris, (KC0YBM) I hope I did not take away from your grid hopping too much! 73 and tnx agn George WA5KBH ___ Sent via AMSAT-BB@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
[amsat-bb] (no subject)
Return Mail to wa1...@yahoo.com Hell! Yudson!!! Nobarc's flea has been rescheduled for the 25th not this sunday but next. Do you want to go with Carli and I.? We are going over to Pittsfield to pick up Chris and then head out to the VFW on housatonic st in Dalton. for the flea. The Drawing for the prizes is 11am. so if you want to get a ticket and be there for the drawing thats the time!. you can jot down your answer here. just click on reply, then type in your reply.hit send. Ok be talkin to ya. de jr. Carli ___ Sent via AMSAT-BB@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
[amsat-bb] EM38/39 EN20/30 - Sat 9/17
I will be heading to Odessa MO tomorrow morning for the early AO-51 pass @ 1018z to activate EM38ax and EM39aa Then David and I will be attending The Pony Express Hamfest in St Joseph Missouri Saturday morning and on our way back we are planning on being on AO-27 @ 1823z working from EN20xa and EN30aa. There is also a SO-50 pass at the same time if we can we might try working both passes Hope to catch you tomorrow.. 73, Gail McDaniel - KB0RZD David McDaniel - KB0RZE ___ Sent via AMSAT-BB@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
