- AMSAT-BB - mailman.amsat.org

P4XT Workshop Design Review
by Michelle Thompson 14 Aug '20

14 Aug '20

https://www.youtube.com/watch?v=QXiWCgo10lg Learn about our work on the digital microwave broadband transponder for amateur radio. All work is donated to the general public as open source. AMSAT is intended as the primary consumer. This digital multiplexing transponder is a regenerative design, taking full advantage of a wide variety of cutting edge technology, intended for amateur radio use in space and terrestrial deployments. This review focuses on decisions made for the prototype board set that implements the transmitter side of the payload. Comment and critique welcome and encouraged. -Michelle W5NYV

1 0

AO-91 Strong out of Europe this morning!
by Roy Dean 14 Aug '20

14 Aug '20

I typically don't try to work these sub 5 degree passes to my northeast due to trees (~14:00z)... but figured I'd at least turn on the antennas and FoxTelem to see if I could score one or two frames. Well, while I was doing some "real" work - I had my headphones on and the bird started to come in at full quieting. I ended up with 35 frames and two European contacts (G0ABI and MI0ILE)! I wish I'd recorded it. Congratulations to the entire AMSAT engineering team for building such incredible little 4" cubes! --Roy K3RLD

1 0

AMSAT-UK OSCAR Satelliet QSO Party - G0AUK
by David G0MRF 14 Aug '20

14 Aug '20

If anyone participating in the QSO Party would like an extra 5 points,then the AMSAT-UK club call will be active on QO-100 this Saturday. QRG around 10489.900 MHzapx. 08.00 - 10.00 + 13.00-15.00 UTC. Additional times if demand exists. The objective of the AMSAT-UK OSCAR Satellite QSO Party is to encourage all radio amateurs to get on the air and make contacts via satellites. While points are given per QSO this isn’t a contest, but we hope it will encourage people to get on the air and enjoy the excitement of making contacts through satellites. Dates Aug 1st to Sept 22nd https://leaderboard.amsat-uk.org Rules and prize details: https://amsat-uk.org/ 73 David G0MRF

1 0

Satellite Demo Saturday 1325-1340Z
by tjschuessler＠verizon.net 14 Aug '20

14 Aug '20

I am doing a virtual Breakfast presentation for the Lewisville TX Amateur Radio Club this Saturday morning, August 15. There are two lower angle, but good passes during the event that I hope to use as a demo. XW-2B starting at 1324Z and XW-2F at 1332Z Please look for me near the center of the passband and say hi to the group watching on GoToMeeting. 73 Tom Schuessler, N5HYP EM12ms N5hyp(a)arrl.net

1 0

Upcoming ARISS Contact Schedule as of 2020-08-14 02:00 UTC
by aj9n＠aol.com 13 Aug '20

13 Aug '20

Upcoming ARISS Contact Schedule as of 2020-08-14 02:00 UTC Quick list of scheduled contacts and events: Kopernik Observatory & Science Center, Vestal, NY, direct via K2ZRO The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Chris Cassidy KF5KDR Contact is go for: Thu 2020-08-20 17:34:21 UTC 59 deg (***) Watch for live stream starting about 20 to 30 minutes ahead of AOS at: https://youtu.be/1Pwcc2rilz0 ######################################################################################################################################## A multi-point telebridge contact means that each student will be on the telebridge from their own home. ************************************************* ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. The following schools have now been postponed or cancelled due to COVID-19: Postponed: No new schools Cancelled: No new schools The ARISS webpage is at https://www.ariss.org/ Watch for future COVID-19 related announcements here also. Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html ARISS Contact Applications (United States) 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 2020-08-14 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. https://www.amsat.org/amsat/ariss/news/arissnews.rtf https://www.amsat.org/amsat/ariss/news/arissnews.txt The successful school list has been updated as of 2020-08-11 16:30 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html ARISS Contact Applications (United States) The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. Message to US Educators ARISS Contact Applications (United States) The Proposal Window of February 1, 2020 to March 31, 2020 has now closed. For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org. Please direct any questions to ariss.us.education(a)gmail.com. 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 ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org. ******************************************************************************** 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: https://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) https://www.jarl.org/ ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/ ****************************************************************************** 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 https://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? Please note that the HamTV system has been brought back to earth for troubleshooting. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts. 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 The HamTV webpage: https://www.amsat-on.be/hamtv-summary/ **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Francesco IKØWGF with 140 Satoshi 7M3TJZ with 138 Sergey RV3DR with 135 Gaston ON4WF with 123 **************************************************************************** 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. Total number of ARISS ISS to earth school events is 1394. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1327. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 48. A complete year by year breakdown of the contacts may be found in the file. https://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: https://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti… Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 62 now on orbit Chris Cassidy KF5KDR Anatoli Ivanishin Ivan Vagner **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 0

LOTW
by Nestor Punales 13 Aug '20

13 Aug '20

*IF everyone that uses this service collaborates with any amount possible it will go longways on supporting this very useful service.* *Nestor N6CKC DM12 * Since 2003, Logbook of The World has provided amateur radio operators with a quick, simple way to claim and verify contacts. This verification formerly required exchange of paper QSL cards and submission of a paper application to ARRL – a slow, environmentally unfriendly, and somewhat expensive process. Using LoTW today, some digital contacts get confirmed *within minutes *of when they conclude. Because ARRL wants there to be no barriers to stations uploading their QSOs, LoTW is available to any amateur radio operator at no cost to the user. However, there are costs incurred by ARRL for Logbook operations run by ARRL staff members including costs for programmers, equipment, web access, and user help and support. *The future of LoTW!* ARRL Headquarters staff works with a permanent committee to oversee, maintain, and improve LoTW. Some notable achievements and goals that have resulted from this work include: - Continuous reviewing and updating of Logbook processes to facilitate ease of use - Adding new ARRL awards as well as awards from other organizations - Enhancing DX registration through supporting email methods - Adding support for multiple locations within a single upload, which supports the rover and mobile communities - Future growth including a redesign of Logbook's web presence.*day, LoTW is more important than ever!* - The worldwide COVID-19 pandemic has significantly slowed international mail. - In some countries, the mail has been embargoed. - Many national ham radio societies have discontinued their QSL bureaus and it's unlikely that they will reappear. Your donation to Logbook of The World will support maintenance of the current database and expansion of the system in the future. Visit the <https://www.arrl.org/arrl-donation-form>*ARRL Donation Page <https://www.arrl.org/arrl-donation-form> *to support Logbook of The World today!

1 0

Upcoming ARISS Contact Schedule as of 2020-08-13 15:30 UTC
by aj9n＠aol.com 13 Aug '20

13 Aug '20

Upcoming ARISS Contact Schedule as of 2020-08-13 15:30 UTC Quick list of scheduled contacts and events: Kopernik Observatory & Science Center, Vestal, NY, direct via K2ZRO The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Chris Cassidy KF5KDR Contact is go for: Fri 2020-08-21 18:23:40 UTC 29 deg Watch for live stream starting about 20 to 30 minutes ahead of AOS at: https://youtu.be/1Pwcc2rilz0 (***) ######################################################################################################################################## A multi-point telebridge contact means that each student will be on the telebridge from their own home. ************************************************* ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. The following schools have now been postponed or cancelled due to COVID-19: Postponed: No new schools Cancelled: No new schools The ARISS webpage is at https://www.ariss.org/ Watch for future COVID-19 related announcements here also. Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html ARISS Contact Applications (United States) 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 2020-08-13 15:30 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. https://www.amsat.org/amsat/ariss/news/arissnews.rtf https://www.amsat.org/amsat/ariss/news/arissnews.txt The successful school list has been updated as of 2020-08-11 16:30 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html ARISS Contact Applications (United States) The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. Message to US Educators ARISS Contact Applications (United States) The Proposal Window of February 1, 2020 to March 31, 2020 has now closed. For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org. Please direct any questions to ariss.us.education(a)gmail.com. 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 ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org. ******************************************************************************** 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: https://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) https://www.jarl.org/ ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/ ****************************************************************************** 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 https://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? Please note that the HamTV system has been brought back to earth for troubleshooting. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts. 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 The HamTV webpage: https://www.amsat-on.be/hamtv-summary/ **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Francesco IKØWGF with 140 Satoshi 7M3TJZ with 138 Sergey RV3DR with 135 Gaston ON4WF with 123 **************************************************************************** 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. Total number of ARISS ISS to earth school events is 1394. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1327. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 48. A complete year by year breakdown of the contacts may be found in the file. https://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: https://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti… Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 62 now on orbit Chris Cassidy KF5KDR Anatoli Ivanishin Ivan Vagner **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 0

fuses
by mikflathead＠aol.com 13 Aug '20

13 Aug '20

There are 2 fuses behind the ac power connector. They are 5 amp 250 volt. They are a bout 3/16 diameter and 3/4 inch long. I do not see them on a schematic. Mike

1 0

FT-736 update.
by Bill Acito 12 Aug '20

12 Aug '20

How do you know there are additional fuses besides the one on the case? I took a look, and as you said, nothing in the schematics or in a general google search. b

1 0

FT-736 update.
by Vince Fiscus, KB7ADL 12 Aug '20

12 Aug '20

Hi All, Still working on the 736. When the PS went, it blew all three fuses. There is a 4 amp external fuse, but there are two internal fuses that were also blown. I can't find the internal fuses on any of the schmaticz. Does any know the current rating of the internal fuses? The rig is okay, it was the power supply that blew the fuses. Thanks again KB7ADL

1 0