AMSAT-BB March 2019

143 participants
198 discussions

Upcoming ARISS Contact Schedule as of 2019-03-19 02:00 UTC
by aj9n＠aol.com 19 Mar '19

19 Mar '19

Upcoming ARISS Contact Schedule as of 2019-03-19 02:00 UTC Quick list of scheduled contacts and events: North Point School for Boys, Calgary, Alberta, Canada, telebridge via IK1SLD The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is David St-Jacques KG5FYI Contact is go for: Wed 2019-03-20 20:16:09 UTC 86 deg Watch for live stream starting about 10-15 minutes before AOS at: www.ariotti.com Khabarovsk University, Khabarovsk, Russia, direct via TBD The ISS callsign is presently scheduled to be RSØISS The scheduled astronaut is TBD Contact is a go for 2019-03-26 (***) Ulluriaq School, Kangiqsualujjuaq, QC, Canada, via LU8YY (***) The ISS callsign is presently scheduled to be NA1SS (***) The scheduled astronaut is David St-Jacques KG5FYI (***) Contact is go for: Thu 2019-03-28 16:14:54 UTC 47 deg (***) ARISS Contact Applications (United States) The ARISS-US program’s education proposal window should go open in the spring of 2019. The ARISS webpage is at http://www.ariss.org/ Note that there are links to other ARISS websites from this site. ARISS Contact Applications (Europe, Africa and the Middle East) Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April. Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia) Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator. For the application, go to: http://www.ariss.org/ariss-application.html. ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) http://www.jarl.org/ (***) ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) http://www.jarl.org/ ****************************************************************************** ARISS is always glad to receive listener reports for the above contacts. ARISS thanks everyone in advance for their assistance. Feel free to send your reports to aj9n(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz. ******************************************************************************* All ARISS contacts are made via the Kenwood radio unless otherwise noted. ******************************************************************************* Several of you have sent me emails asking about the RAC ARISS website and not being able to get in. That has now been changed to http://www.ariss.org/ Note that there are links to other ARISS websites from this site. **************************************************************************** Looking for something new to do? How about receiving DATV from the ISS? If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Satoshi 7M3TJZ with 135 Francesco IKØWGF with 132 Gaston ON4WF with 123 Sergey RV3DR with 112 **************************************************************************** The webpages listed below were all reviewed for accuracy. Out of date webpages were removed, and new ones have been added. If there are additional ARISS websites I need to know about, please let me know. Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time. All dates and times listed follow International Standard ISO 8601 date and time format YYYY-MM-DD HH:MM:SS The complete schedule page has been updated as of 2019-03-19 02:00 UTC. (***) Here you will find a listing of all scheduled school contacts, and questions, other ISS related websites, IRLP and Echolink websites, and instructions for any contact that may be streamed live. http://www.amsat.org/amsat/ariss/news/arissnews.rtf http://www.amsat.org/amsat/ariss/news/arissnews.txt Total number of ARISS ISS to earth school events is 1293. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1236. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 47. A complete year by year breakdown of the contacts may be found in the file. http://www.amsat.org/amsat/ariss/news/arissnews.rtf Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: http://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** The successful school list has been updated as of 2019-03-05 16:00 UTC. http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction .rtf Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC. http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 58 on orbit Oleg Konenenko David St-Jacques KG5FYI Anne McClain Exp. 59 on orbit Christina Koch Aleksey Ovchinin Nick Hague KG5TMV **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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AMSAT on HF
by skristof＠etczone.com 18 Mar '19

18 Mar '19

For anyone interested in the AMSAT on HF award I will be calling "CQ AMSAT" in slow code from 2300 UTC to 2330 UTC today (Monday). Frequency will be between 7.045 MHz and 7.055 MHz. Award info: https://www.amsat.org/amsat-50th-anniversary-awards-program/ Steve AI9IN

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Re: [amsat-bb] Attaching the coax to antenna boom
by Edward R Cole 18 Mar '19

18 Mar '19

Gentlemen Guessing either you did not read the entire article By Kent-AWA5VJB, or misunderstood. Kent was addressing a way to use a metallic crossboom with crossed yagis. For satellite I suspect you have them connected to produce circular polarity. Normal installation would require the end parts of the crossboom be non-metallic (probably fiberglass for strength). No metal should be closer than half-wavelength from element ends. So the only way to dress cable from the driven elements is draped off the backend of the antenna booms. But Kent rigorously measured the effect of a metallic crossboom connection to the x-yagi boom to determine least interaction. The connection location on the antenna boom is critical but does allow running coax across both crossboom and antenna boom. Being "cheap and Lazy" I decided to mount my satellite antenna using a metal crossboom with Yaesu B5400 azel rotator. I run my cables on the boom with tight corners to keep cables close to surface on the booms. Everything works well. I've not made field measurements so do not know how well they are working but was good enough for AO40, modes US and LS. http://www.kl7uw.com/sat.htm Not currently RV for satellite. 73, Ed - KL7UW -------------------------------------- From: "Frank Karnauskas" <n1uw(a)gokarns.com> To: <amsat-bb(a)amsat.org> Subject: Re: [amsat-bb] Attaching the coax to antenna boom Message-ID: <000001d4dd4a$f11aa280$d34fe780$(a)gokarns.com> Content-Type: text/plain; charset="us-ascii" This is quite curious. Page 1 of the WA5VJB paper says, "Run the coax back down the antenna and along the boom keeping the radius small..." His hand-drawn illustration shows the feedline going down the boom then making a hard turn at the boom-to-cross arm plate. The M2 instruction sheets for the 2MCP8A and 436CP16 antennas both state (in bold type), "Do not route feedline to boom to mast plate as exiting antenna here will adversely affect circular field." Mr. Britain's paper is obviously focused on mounting the cross bar somewhere along the boom of a somewhat long antenna. The M2 instructions are for mounting short antennas from the back of the boom to the cross bar. Not the same situation. But, for a newbie like me, the definitive conclusion to this discussion is...I am still confused. I was hoping to hang my M2 LEO antennas Monday morning but now not until after I call the M2 support line for their read on this. 73, Frank FRANK W. KARNAUSKAS, N1UW 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubususa(a)gmail.com

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yoctenna / yefa
by Lapo Pieri 18 Mar '19

18 Mar '19

Hi to All, I just made my satellite station operational again and I'd like to show you my last labor: a new antenna for VHF and up that has a large bandwidth, high tollerance to fabrication tollerance and clean pattern. It is in its fairly early state of development but I think it could be of some interest for the community. So if you are curious you can find a short description here: http://www.radioteknos.it/yoctenna_yefa_en-1.html And any comments, criticism, or whatever are welcome 73, Lapo IK5NAX

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FoxTelem Version 1.07 released
by Chris Thompson 18 Mar '19

18 Mar '19

I'm officially releasing version 1.07 of FoxTelem. A test version has been out for a while, but it had several issues, including a lower decode rate than 1.06. That prevented release for a while. Those issues (and something like 65 other defects) are now all fixed and this decoder performs better than 1.06. Feel free to test them side by side and report back if that is not the case for you. We are always interested in any comparative results. In addition to defects in FoxTelem 1.06 and earlier versions of 1.07, this also introduces Doppler calculation with automatic adjustment of the decoder frequency. This is especially useful for decoding beacons and has been helpful in testing for Fox-1A / AO-85 and Fox-1Cliff / AO-95 which are both in SAFE mode. Decoding from Doppler takes a bit of configuration to get right. Have a read of the new sections in the manual or ask for help if you want to give it a try. There are pros and cons vs "Find Signal" for sure. Version 1.07 changes the core SDR within FoxTelem to use a Numerically Controlled Oscillator (NCO) rather than an FFT Filter for the conversion to base-band. This produces better decodes and will allow the support of wider bandwidth SDRs in the future. The old decoder is available still if needed from the settings screen. Read the manual for details. Version 1.07 also introduces two new BPSK decoders in advance of the Fox-1E launch. (I have no inside information about when that will be, but I have the decoder ready :) I also wrote some notes on the comparison between the two decoders, which you can read if you are interested in BPSK decoding performance, or just wonder what I do with my time in the evenings: http://www.g0kla.com/workbench/2019-03-09.php The releases are here: http://amsat.us/FoxTelem/windows/foxtelem_1.07y_windows.zip http://amsat.us/FoxTelem/linux/foxtelem_1.07y_linux.tar.gz http://amsat.us/FoxTelem/mac/foxtelem_1.07y_mac.tar.gz KEY CHANGES in 1.07 ~~~~~~~~~~~~~~~~~~ * Ability to add a new spacecraft from the menu. You can also remove them. * Doppler calculation and tracking as an option instead of "Find Signal" * A better SDR based on a Numerically Controlled Oscillator, ready for wider SDRs * Two new PSK decoders - Costas Loop and Dotproduct * RTL dongle implemented for testing, though more work to do * Stops downloading keps when position calc is off * Allows toggling of high speed / DUV display when in auto mode * Fixed plotting issues for Earth plots * Fixes several crashes and bugs * Fixes copy paste issues with tables * Respects left/right audio preference when processing wav files * Implements formats for later spacecraft - Fox-1E and HuskySat * Linux and Mac launch script updated to locate the JVM (especially on Mac). Please report if when this works/does not work * MEMS gyro calibration updated * Fixed a bug where AO-85 data from the server could not be stepped through And many other bug fixes. Full list of changes here: https://github.com/ac2cz/FoxTelem/milestone/12?closed=1 Let me know any feedback. 73 Chris G0KLA / AC2CZ -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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Upcoming ARISS Contact Schedule as of 2019-03-18 19:00 UTC
by aj9n＠aol.com 18 Mar '19

18 Mar '19

Upcoming ARISS Contact Schedule as of 2019-03-18 19:00 UTC Quick list of scheduled contacts and events: North Point School for Boys, Calgary, Alberta, Canada, telebridge via IK1SLD The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is David St-Jacques KG5FYI Contact is go for: Wed 2019-03-20 20:16:09 UTC 86 deg Watch for live stream starting about 10-15 minutes before AOS at: www.ariotti.com Exp. 59 on orbit (***) Welcome aboard! (***) Christina Koch Aleksey Ovchinin Nick Hague KG5TMV ARISS Contact Applications (United States) The ARISS-US program’s education proposal window should go open in the spring of 2019. The ARISS webpage is at http://www.ariss.org/ Note that there are links to other ARISS websites from this site. ARISS Contact Applications (Europe, Africa and the Middle East) Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April. Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia) Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator. For the application, go to: http://www.ariss.org/ariss-application.html. ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) http://www.jarl.org/ (***) ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) http://www.jarl.org/ ****************************************************************************** ARISS is always glad to receive listener reports for the above contacts. ARISS thanks everyone in advance for their assistance. Feel free to send your reports to aj9n(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz. ******************************************************************************* All ARISS contacts are made via the Kenwood radio unless otherwise noted. ******************************************************************************* Several of you have sent me emails asking about the RAC ARISS website and not being able to get in. That has now been changed to http://www.ariss.org/ Note that there are links to other ARISS websites from this site. **************************************************************************** Looking for something new to do? How about receiving DATV from the ISS? If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Satoshi 7M3TJZ with 135 Francesco IKØWGF with 132 Gaston ON4WF with 123 Sergey RV3DR with 112 **************************************************************************** The webpages listed below were all reviewed for accuracy. Out of date webpages were removed, and new ones have been added. If there are additional ARISS websites I need to know about, please let me know. Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time. All dates and times listed follow International Standard ISO 8601 date and time format YYYY-MM-DD HH:MM:SS The complete schedule page has been updated as of 2019-03-18 19:00 UTC. (***) Here you will find a listing of all scheduled school contacts, and questions, other ISS related websites, IRLP and Echolink websites, and instructions for any contact that may be streamed live. http://www.amsat.org/amsat/ariss/news/arissnews.rtf http://www.amsat.org/amsat/ariss/news/arissnews.txt Total number of ARISS ISS to earth school events is 1293. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1236. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 47. A complete year by year breakdown of the contacts may be found in the file. http://www.amsat.org/amsat/ariss/news/arissnews.rtf Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: http://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** The successful school list has been updated as of 2019-03-05 16:00 UTC. http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction .rtf Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC. http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 58 on orbit Oleg Konenenko David St-Jacques KG5FYI Anne McClain Exp. 59 on orbit (***) Welcome aboard! (***) Christina Koch Aleksey Ovchinin Nick Hague KG5TMV **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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Re: [amsat-bb] Shoppinglist (Making a T notch filter)
by GEO Badger 18 Mar '19

18 Mar '19

How about rolling your own? https://qrznow.com/145-mhz-low-loss-bandpass-helical-filter/ https://www.arrl.org/files/file/Technology/Intermod/No_Tune_Filter.pdf Or DCI? http://dci.ca/ ___ Sent from my two way wrist watch 73 de W3AB/GEOOn Mar 15, 2019, at 07:39, Hans BX2ABT <hans.bx2abt(a)msa.hinet.net> wrote: Hello all, Unfortunately it's not one transmitter, but four of them (I thought 5, but I just checked. Powers range from 1 - 10 kW), producing a lot of spurious signals and raising the noise floor by about 10 dB when pointing the beam into that direction. I don't think stubs will be broad enough to cover 89 to 106 MHz, but I never worked with them, so I'm guessing here. I don't have any problems with FM stations leaking onto 70 cm, just the air band, NOAA frequencies and 2 meters. My Airspy mini also picks up lots of spurious signals below 50 MHz, often hard enough to ID. I found this filter from Par Electronics (http://www.parelectronics.com/fm-broadcast.php), but it doesn't indicate if you can tx through it. Otherwise I will have to use it in the shack and remove it when I want to tx on 2m, with the risk of forgetting it and blowing it up. Will a sequencer be a solution then? 73 de Hans BX2ABT On 03/15/2019 09:42 PM, Robert Bruninga wrote: And you can make it without all the connectors at the T if you want. Though it takes some close and inventive soldering of the "T". Since the FM band is 88 to 108 that (I think) is far enough from 145 to add minimum loss. But at UHF, one needs to carefully check to make sure that the FM frequency is not also a multiple of the FM frequency. Tell us the FM broadcast frequency and we can take a quick look. Bob -----Original Message----- From: AMSAT-BB <amsat-bb-bounces(a)amsat.org> On Behalf Of Wendy and Terry Osborne Sent: Thursday, March 14, 2019 11:50 PM To: amsat-bb(a)amsat.org; Hans BX2ABT <hans.bx2abt(a)msa.hinet.net> Subject: Re: [amsat-bb] Shoppinglist Hi Hans, If you have a plenty of RG213 and suitable connectors, you could try making a Coax stub filter. You need a cable length that is an odd multiple of a quarter wave length long at the FM Tx frequency and an even multiple of a quarter wave at the frequency that you want (2M /70CMs). A single RG213 stub would have about 25dB of rejection and would pass 100 Watts OK. You just need a coax T connector and some matching connectors. To trim the stub, use a set of garden secateurs. If you have a Bao feng or similar radio you could use that on the FM band attached to your T and trim the stub for minimum signal on the unwanted Tx frequency.v dir="auto">I haven't run the calculations for how long the stub should be but if it's useful I could do so. 73, Terry Osborne ZL2BAC -----Original Message----- From: Hans BX2ABT Sent: Thursday, March 14, 2019 12:33 AM To: amsat-bb(a)amsat.org Subject: [amsat-bb] Shoppinglist My sis-in-law will be visiting from the States soon and I usually make her bring some stuff for me so I can save on freight costs. She will definitely bring an Arrow Antenna so I can start some portable operations. A Sony voice recorder is also on my list, as well as some coax cable (RG-400 is what I'm thinking of. Really expensive here). Don't have a budget for much more, but since I have a clear line-of-sight to some 10 kW FM transmitters from my QTH I thought I should at least get a good FM-band notch filter. Any recommendations on where to buy this in the US? I haven't found anything when I googled, not even a lot of 2/70 band pass filters, or low pass filters to prevent desensing on 70 cm. My own creations have a too high insertion loss, so this time I really want something a bit more professional and something that can handle at least 100 Watts of power. Any recommendations are welcome. Cheers. --Hans BX2ABT Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

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Re: [amsat-bb] Attaching the coax to antenna boom
by Frank Karnauskas 18 Mar '19

18 Mar '19

This is quite curious. Page 1 of the WA5VJB paper says, "Run the coax back down the antenna and along the boom keeping the radius small..." His hand-drawn illustration shows the feedline going down the boom then making a hard turn at the boom-to-cross arm plate. The M2 instruction sheets for the 2MCP8A and 436CP16 antennas both state (in bold type), "Do not route feedline to boom to mast plate as exiting antenna here will adversely affect circular field." Mr. Britain's paper is obviously focused on mounting the cross bar somewhere along the boom of a somewhat long antenna. The M2 instructions are for mounting short antennas from the back of the boom to the cross bar. Not the same situation. But, for a newbie like me, the definitive conclusion to this discussion is...I am still confused. I was hoping to hang my M2 LEO antennas Monday morning but now not until after I call the M2 support line for their read on this. 73, Frank FRANK W. KARNAUSKAS, N1UW ARRL MINNESOTA AFFILIATED CLUB COORDINATOR AMSAT NEWS SERVICE ROTATING EDITOR 1402 SUMMIT SHORES DR. BURNSVILLE, MN 55306 N1UW(a)GOKARNS.com 612-644-9174 -----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Gary Sent: Sunday, March 17, 2019 2:29 PM To: radiomb; amsat-bb(a)amsat.org Subject: Re: [amsat-bb] Attaching the coax to antenna boom Yes, you can, just pay attention to how far your coax turn is from your driven element. There are a couple spots to avoid. It is pretty well explained in Kent Britain's (wa5vjb) paper here: http://www.kk0sd.net/metalboom/metalboom.htm 73, Gary kk0sd -----Original Message----- From: AMSAT-BB <amsat-bb-bounces(a)amsat.org> On Behalf Of radiomb Sent: Sunday, March 17, 2019 4:04 PM To: amsat-bb(a)amsat.org Subject: [amsat-bb] Attaching the coax to antenna boom Building my new ground station and another question. I have always only elevated my antenna 90 degrees. I loose about 20 25 seconds while the azimuth rotator turns 180 degrees to track the rest of the pass. I have just let the coax hang off the back of the antennas in a big loop. I am afraid it will get hung up going 180 degrees. Question, Can I attach the coax to the antenna boom and run it back until it gets to the cross boom or will that throw off the radiation pattern? Thanks 73 Mike K4MIA _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

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Looking for older AMSAT Journal article
by Bob Hammond 18 Mar '19

18 Mar '19

I need a copy of an article on Mark Spencer's minimalist preamp in the Nov/Dec 2012 Journal. Anyone have a copy? 73, Bob W7OTJ

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Upcoming ARISS contact with North Point School for Boys, Calgary, Alberta, Canada - CORRECTED RELEASE
by n4csitwo＠bellsouth.net 18 Mar '19

18 Mar '19

CORRECTED RELEASE: Please note that the original ARISS press release for North Point School for Boys, Calgary, Alberta, Canada sent on 3/17/2019 at 11:43 UTC, stated that the contact should be audible over Alberta, Canada. This was incorrect. The contact will instead be audible over Italy and adjacent areas. We sorry for any inconvenience this may have caused. Below is a corrected copy. ---------------------------------------- An International Space Station school contact has been planned with participants at North Point School for Boys, Calgary, Alberta, Canada on 20 Mar. The event is scheduled to begin at approximately 20:16 UTC. It is recommended that you start listening approximately 10 minutes before this time.The duration of the contact is approximately 9 minutes and 30 seconds. The contact will be a telebridge between OR4ISS and IK1SLD. The contact should be audible over Italy and adjacent areas. Interested parties are invited to listen in on the 145.80 MHz downlink. The contact is expected to be conducted in English. North Point School for Boys, a private school in Calgary, provides a setting for boys from Kindergarten to Grade 9 in which they are challenged and motivated, developing into young men of integrity with a genuine love of learning. Through strong mentors, experiential learning and blended learning, students discover who they are and how they learn. Students will be learning about the International Space Station through social discussion, science class and engineering academy. Students will be building a scale model of the International Space Station and learning Canada's commitment to the space program. Participants will ask as many of the following questions as time allows: 1. How did you train to become an astronaut? 2. What do you do all day? 3. Is time different on the space station? 4. What is it like being weightless in space? 5. Is it hard to move around? 6. What is your favourite space food? 7. What is the coolest thing you have seen while on the space station? 8. How long does it take to get used to zero gravity? 9. What did you bring with you to the International Space Station? 10. Was it scary launching on the Space Shuttle? 11. Will you get to do a spacewalk? 12. Do you operate the Canadarm? 13. What does the sunrise look like? 14. How long was the Soyuz ride? 15. What is your rank with the Canadian Space Agency? 16. Do you get to see all the parts of the International Space Station? 17. Can you see Canada from space? 18. How do astronauts breathe with their EVA suits on? 19. Do astronauts eat together? 20. What is it like being in space? PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES: Visit ARISS on Facebook. We can be found at Amateur Radio on the International Space Station (ARISS). To receive our Twitter updates, follow @ARISS_status Next planned event(s): TBD About ARISS: Amateur Radio on the International Space Station (ARISS) is a cooperative venture of international amateur radio societies and the space agencies that support the International Space Station (ISS). In the United States, sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American Radio Relay League (ARRL), the Center for the Advancement of Science in Space (CASIS) and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or informal education venues. With the help of experienced amateur radio volunteers, ISS crews speak directly with large audiences in a variety of public forums. Before and during these radio contacts, students, teachers, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org, www.amsat.org, and www.arrl.org. Thank you & 73, David - AA4KN --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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AMSAT-BB March 2019