AMSAT-BB June 2019

136 participants
187 discussions

For sale ICOM AG-35 70cm Mast Head Preamp
by Paul Baldock 09 Jun '19

09 Jun '19

For sale ICOM AG-35 70cm Mast Head Preamp with home brew power inserter. Original owner. Verified 20dB gain. Includes original Instruction sheet. $145.00 including conus shipping - Paul KW7Y

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Good results with polyphase filterbank from Theseus Cores
by Michelle Thompson 08 Jun '19

08 Jun '19

Phase 4 Ground has had some good results with the RFNoC polyphase filterbank from Theseus Cores. Having a fast efficient polyphase filterbank for our payload is just as important as getting an LDPC decoder for the ground! Here's a video update on this week's work in the lab: https://youtu.be/iR6CJCCg_mw The hardest parts are coming together! Still plenty to do, but these blocks have been two years in progress. Seeing them start to work over the air is a real thrill. -Michelle W5NYV

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IC-910h Microphone Replacement Suggestion
by Jeff Wandling 07 Jun '19

07 Jun '19

After a long hiatus from Satellite work, I am rebuilding my shack to work the satellites again! My IC-910h has lost it's Mic. I need to replace it. Before I do, I wanted to ask the list for recommendations on vendor/product to replace the MH-12 mic for the IC-910h given an interest in choosing a better solution. I'm interested in either a head-set style or a hand-held style. Comments directly and I'll summarize if there's interest. Thank you, -jeff W7BRS

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Upcoming ARISS contact with Dum detí a mládeze Olomouc (House of Children and Youth Olomouc), Olomouc, Czech Republic
by n4csitwo＠bellsouth.net 07 Jun '19

07 Jun '19

An International Space Station school contact has been planned with participants at Dum detí a mládeze Olomouc (House of Children and Youth Olomouc), Olomouc, Czech Republic, on 08 Jun. The event is scheduled to begin at approximately 13:05 UTC. The duration of the contact is approximately 9 minutes and 30 seconds. The contact will be direct between OR4ISS and OK2KWX. The contact should be audible over the Czech Republic 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. Dùm dìtí a mládeze Olomouc (eng.: House of Children and Youth, abbr. DDM Olomouc) - a leisure time center which operates in 5 buildings, whereas four are situated in Olomouc. Since April 2001 the DDM is constituted by Olomouc Regional Authority. For the whole public DDM offered both regular clubs and interest groups as well as occasional and stay events. Over 150 interest groups started to work every year, regularly - once, twice or three times a week - attended by 2602 children and youth at the age from 3 to 25 years only during the last school year (2017/2018). These activities were provided by 150 employees, external and voluntary workers. During the summer holidays, DDM Olomouc organized more than 30 summer camps for almost 800 children. In summer furthermore, as during the whole year, DDM Olomouc offers cheap accommodation both right in Olomouc and in Ochoz u Konice both locations are up to 30 km away from Olomouc. Participants will ask as many of the following questions as time allows: 1. How many solar panels are powering the entire station and do you have any other power sources? 2. What voltage do your instruments using aboard the ISS? 3. What would you tell the people who believe that the Earth is flat? 4. How often do you check the social networks and have you any time to watch Youtube? 5. Did the ASTROBEE's already arrive and do you use them already? 6. How far from the station can you go and can you move outside untethered? 7. How long does it take to get from Earth to the ISS? 8. What does being in a spacesuit feel like and what is outside temperature? 9. How long do the spacesuit's energy and oxygen supplies last? 10. Do you feel any changes to your muscular system during your mission, or is it a bit of a shock after your return back to Earth? 11. Do you need to strap in when you sleep and how do you enjoy sleeping in zero gravity? 12. How often do you eat and do you enjoy the taste of the food? 13. Have you experienced any accidents while on the station, for example, a device failure? 14. How do you fight a fire if it breaks out onboard the ISS? 15. How much waste is generated on the ISS and what are you doing with it? 16. Can you play any computer games and how much free time do you have? 17. What does it feel like to fly a rocket up into space? 18. How much time do you spend exercising each day? 19. How would you deal with a serious injury, for example, hand fracture? 20. How and how often do you communicate with your family? 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): 1. Peninsula Grammar, Melbourne, Australia, telebridge via VK4KHZ The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Nick Hague KG5TMV Contact is go for: Thu 2019-06-13 11:10:52 UTC 2. Smithsonian Air and Space - Udvar-Hazy, Chantilly, VA, USA, telebridge via W6SRJ The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Nick Hague KG5TMV Contact is go for: Sat 2019-06-15 18:11 UTC 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 (STEM) 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. 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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Ham-Com 2019
by Glenn Miller - AA5PK 06 Jun '19

06 Jun '19

Ham-Com hamcom.org is being held in Plano, TX, on 7-8 June where AMSAT will have a booth. Several of us will also be doing satellite demonstrations from the hamfest in EM13. Listen for us (AA5PK, AE5PH, W5PFG and possibly others) on most of the FM and linear birds from 1700Z until 2000Z on Friday and 1345Z until 2030Z on Saturday. 73, Glenn AA5PK

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Roving June 7 and 8
by johnv＠frontier.com 06 Jun '19

06 Jun '19

I will be driving to Newport OR tomorrow June 7th and will try to stop for AO-91 in CN86 (maybe CN85 depending on traffic) at 13:12 local 2012 UTC. I will stop in Newport CN74 over night and on Saturday June 8th and I will try AO-91 at 11:57 local 1857 UTC and then AO-92 at 12:08 1908 UTC. This all depends on how the swap meet is going, cause I'm selling. Friday evening I will be at Yaquina Head Light USA-907 for those who also do lights. Most likely I be around 14.335 KHz. John N7AME

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Re: [amsat-bb] [ans] ANS-157 AMSAT News Service Special Bulletin - AMSAT President Awarded Russian E.T. Krenkel Medal
by Mark L. Hammond 06 Jun '19

06 Jun '19

Way to go, Mr. President! Congratulations. Mark N8MH On Thu, Jun 6, 2019 at 11:04 AM JoAnne K9JKM via ANS <ans(a)amsat.org> wrote: > > AMSAT NEWS SERVICE SPECIAL BULLETIN > ANS-157 > > The AMSAT News Service bulletins are a free, weekly news and infor- > mation service of AMSAT North America, The Radio Amateur Satellite > Corporation. ANS publishes news related to Amateur Radio in Space > including reports on the activities of a worldwide group of Amateur > Radio operators who share an active interest in designing, building, > launching and communicating through analog and digital Amateur Radio > satellites. > > The news feed on http://www.amsat.org publishes news of Amateur > Radio in Space as soon as our volunteers can post it. > > Please send any amateur satellite news or reports to: > ans-editor at amsat.org. > > You can sign up for free e-mail delivery of the AMSAT News Service > Bulletins via the ANS List; to join this list see: > http://www.amsat.org/mailman/listinfo/ans > > In this edition: > > * AMSAT President Awarded Russian E.T. Krenkel Medal > > SB SAT @ AMSAT $ANS-157.01 > ANS-157 AMSAT News Service Special Bulletin > > AMSAT News Service Bulletin 157.01 > From AMSAT HQ KENSINGTON, MD. > DATE June 6, 2019 > To All RADIO AMATEURS > BID: $ANS-157.01 > > AMSAT President Awarded Russian E.T. Krenkel Medal > > AMSAT President and ARRL Life Member Joe Spier, K6WAO, has been > awarded the Russian E.T. Krenkel Medal, a prestigious award granted > to individuals and organizations for outstanding global contributions > to Amateur Radio. > > Joe Spier, K6WAO is a long time supporter of Amateur Radio in Space > and international cooperation. K6WAO is the President of the Radio > Amateur Satellite Corporation (AMSAT). He has also served AMSAT as > Executive Vice President, and Vice President, Educational Relations. > > He is a long term supporter of Amateur Radio on the International > Space Station (ARISS) and scientific, technical, engineering, and > mathematics education. Spier is an AMSAT Life Member. He also is a > Life Member of American Radio Relay League (ARRL) and the Society > of Amateur Radio Astronomers (SARA). > > The award's namesake, Ernst Teodorovich Krenkel, was a radio amateur > who, over the years, used the call signs RAEM, U3AA, and UA3AA. Born > in Poland, Krenkel was an Arctic explorer who took part in the first > Soviet "drifting station," North Pole-1. He was made a "Hero of the > Soviet Union" in 1938 for his exploits. > > Krenkel's son, T.E. Krenkel, is among the four signatories to the > award certificate. The younger Krenkel, a professor at the Moscow > Technical College of Telecommunication and Informatics, said his > father was an avid radio amateur who served as the first chairman > of the Central Radio Club in the USSR. > > Krenkel's image appears on postage stamps from the USSR and Russia, > and he authored a biography entitled My Callsign is RAEM. In the era > when all radio amateurs received QSL cards via Box 88, Moscow, Krenkel > was allowed to have his own postal address on his QSLs and was issued > the non-standard RAEM call sign. > > Information about the Krenkel Medal can be found at: > http://krenkelmedal.org/index.php?id=49 > > [ANS thanks the Russian National Academy of Researches and > Discoveries for the above information] > > /EX > > In addition to regular membership, AMSAT offers membership in the > President's Club. Members of the President's Club, as sustaining > donors to AMSAT Project Funds, will be eligible to receive addi- > tional benefits. Application forms are available from the AMSAT > Office. > > _______________________________________________ > Via the ANS mailing list courtesy of AMSAT-NA > https://www.amsat.org/mailman/listinfo/ans > -- Mark L. Hammond [N8MH]

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Doppler shift question
by David Bartholomew 06 Jun '19

06 Jun '19

I am composing a presentation about FM sats, hopefully to be given in a few months at a hamfest. How to remember which way to compensate for doppler: Always adjust the higher frequency. For V/u or U/v sats, this means adjust the 70cm side and leave the 2m side fixed. Which way to move it? Very easy to remember. If 70cm is the UPlink, you'll adjust your transmit frequency UPward through the pass. If 70cm is the DOWNlink, you'll adjust your receive frequency DOWNward through the pass. I think others have basically explained why. Dave AD7DB

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Doppler shift question
by Philip Jenkins 06 Jun '19

06 Jun '19

This came up at AMSAT Academy at Hamvention, and I still can't wrap my head around it (something simple I'm not getting, I'm sure). I know the xmit/receive frequencies aren't shifted, stay the same at the satellite. SO-50 has a 435 Mhz downlink; as the satellite approaches me from AOS I lower my receive frequency (and continue lowering it as the bird approaches LOS). So far so good. AO 91/92 have a 435 Mhz uplink,; as the satellite approaches me from AOS, I go up in my transmit frequency. Here is where I get lost: Why do I* lower* the frequency on 435 Mhz when receiving a satellite, but *raise* the 435 Mhz frequency when transmitting to a satelllite? So, my question boils down to - why should transmit doppler shift go in the opposite direction from receive on the same band? In both cases, the satellites are approaching me (from AOS). Basically, why the difference when I'm transmitting and when I'm receiving? 73 Philip N4HF

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CM 95 Roving
by Bob Keating 06 Jun '19

06 Jun '19

I will be working the FM satellites from CM95 in Pismo Beach, CA this weekend on a holiday schedule. Hope to catch some of you out there! 73, Bob N6REK

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AMSAT-BB June 2019