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AO-91 Transatlantic
by Peter Green 22 Oct '18

22 Oct '18

Hi Burns Many thanks for the QS so it was a little scratchy at times but we made it thank you for FN42. There was also a CU3 and an EA5 calling on the satellite. It would be absolutely great to get more operation from North America on the FM satellite working transatlantic. Thanks again for taking the time and trouble to come up on the satellite. Best wishes Pete G0ABI Sent from my iPhone

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Re: [amsat-bb] KR-400 transformer wiring
by Hans BX2ABT 22 Oct '18

22 Oct '18

Ah, I forgot about the (double compared to 220V) current being distributed between two parallel windings when using 110V, so that must be it. It's late now, but will try Monday. Cheers, Hans On 10/21/18 10:24 PM, Jim Sanford wrote: > Try this: > > Remove the short from 2 and 5. > > Connect 110V to 1 and 2. > > Short 3 - 6. > > Measure output voltage. If too low, put power at 4 and 5. > > > It is possible that this would put 3 - 5 and 4 - 6 in opposite > phases. In which case, you'll have ZERO output. In this case, short > 3 and 4 instead of 3 and 6. Again try power at 1 and 2 first. > > > Good luck, and please share results! > > 73, > > Jim > > wb4gcs(a)amsat.org > > > > On 10/21/2018 9:12 AM, Hans BX2ABT wrote: >> I got this old KR-400 azimuth rotor as a gift, but is wired for 220V >> and I need to run it off of 110V. The transformer's wiring now looks >> like this: >> >> >> | 220V | >> | | >> |~~~~|~~~~| |~~~~|~~~~| >> 5 1 3 6 2 4 >> | | >> |__________________| >> >> >> If the drawing is messed up, here is the gist of it: The primary >> consists of two (parallel/separate) windings, one with odd, one with >> even numbering (3-5 and 4-6) with the center of the winding named 1 >> and 2. Currently 2 and 5 are shorted and 220V comes in at 1 and 6. So >> current flows from 1 to 5 to 2 to 6 and vice versa. >> >> To rewire to 110V I guess I just use any of the combination 1-3, 1-5, >> 2-4 or 2-6. But I am just curious why the 220V wiring was done over >> two coils, not one? Was this factory standard or has my unit been >> modified with a different transformer? >> >> Once I get the control unit powered up it time to test the rotator >> and see if it needs any maintenance (probably will, because it hasn't >> been used for a long while). >> >> _______________________________________________ >> 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 > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > >

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KR-400 transformer wiring
by Hans BX2ABT 22 Oct '18

22 Oct '18

I got this old KR-400 azimuth rotor as a gift, but is wired for 220V and I need to run it off of 110V. The transformer's wiring now looks like this: | 220V | | | |~~~~|~~~~| |~~~~|~~~~| 5 1 3 6 2 4 | | |__________________| If the drawing is messed up, here is the gist of it: The primary consists of two (parallel/separate) windings, one with odd, one with even numbering (3-5 and 4-6) with the center of the winding named 1 and 2. Currently 2 and 5 are shorted and 220V comes in at 1 and 6. So current flows from 1 to 5 to 2 to 6 and vice versa. To rewire to 110V I guess I just use any of the combination 1-3, 1-5, 2-4 or 2-6. But I am just curious why the 220V wiring was done over two coils, not one? Was this factory standard or has my unit been modified with a different transformer? Once I get the control unit powered up it time to test the rotator and see if it needs any maintenance (probably will, because it hasn't been used for a long while).

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Lapan IO86
by PY5LF 21 Oct '18

21 Oct '18

Jamboree on the air , Lapan , IO86 . https://youtu.be/iPh-D0h_cEI 73

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AlfaSpid issue
by kb2mjeff＠att.net 21 Oct '18

21 Oct '18

I’m back at my winter home in Florida and decided today, to work on my AlfaSpid rotor control box issue. I replaced two relays to fix the Elevation issue but in testing it before I replaced the other two relays I’m now having a problem with the azimuth that’s been working 100% until this point. When I turn on the rotor control the elevation now seems to work ok, but now the azimuth immediately goes into a clockwise rotation. No matter what I do to the controller, upon startup it starts turning CW, only way to stop is to power it down The azimuth was working fine this morning when a worked a couple of sat passes. Anyone have any ideas? Does anyone know where I can send this to have it fixed? I have no schematic, or even simple instructions on how to reset, etc. 73 Jeff kb2m --- This email has been checked for viruses by AVG. https://www.avg.com

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How many things can go wrong at once?
by Burns Fisher 21 Oct '18

21 Oct '18

A couple days ago work G0ABI via AO-91 based on a sched we had made. Suddenly the elevation in my rotor did not work! So I moved it by hand, called and called...I did not hear myself. Later Peter sent me a recording--he had heard me just fine so my Rx was screwed up Today, I found the rotor problem (a cable). I had hoped it would be the same problem with the Rx (like a hungry mouse) but no, apparently not. So I tried 91 again today. Wait, why is the downlink band so quiet? First, something had happened to my database in MacDoppler and it was all hosed. It had the AO-91 as a V/u satellite and the wrong freq anyway. Fixed that in time. Still very quiet on the band. Took my HT to probe around a bit. Some strong carrier on 145.965. I went outside and suddenly heard a voice. Aha! Someone using the satellite band! Oh, wait, that is AO-91 booming in on my HT with rubber ducky at about 5 degrees above the horizon! That was actually pretty cool! (I was probably hearing contacts with SparkFest!) Still trying to find the source of the 145.965 (besides AO-91 of course). It is clearly inside my house--I even know which breaker. But so far not the obvious things (power supply, network switch, computer, UPS, etc). I'll keep looking. But it just goes to show that when a bunch of things happen at once, it is not ALWAYS due to the same root cause. 73, Burns WB1FJ

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AO-91 demo today 1714 UTC - 2018-10-20 from SparkCON
by John Brier 21 Oct '18

21 Oct '18

Hi all, I will be doing a demo from downtown Raleigh, NC (FM05) today for SparkCON, an annual "creativity festival." SparkCON has lots of sub groups for various creativity pursuits like poetrySPARK and fashionSPARK. I will be doing the demo for geekSPARK. https://sparkcon.com https://sparkcon.com/geekspark/ I decided to do this demo last minute so it is not on the schedule. This AO-91 pass is a good pass because it goes N-S and is high elevation (68 degrees) and I will be on Fayettville street which is also N-S and is the main downtown road which is surrounded by tall buildings. I have not tested the area for QRM though, so that may be an issue. Anyway, if you hear me, give me a call! 73, John Brier KG4AKV P.S. Serena Aunon-Chancellor is on the mic from NA1SS today and making random contacts according to reports on Twitter from Patrick WD9EWK and others. Good luck to all who call her!

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ARISS News Release No. 18-12
by David Jordan 20 Oct '18

20 Oct '18

ARISS News Release No. 18-12 Dave Jordan, AA4KN ARISS PR aa4kn(a)amsat.org ARISS SSTV Joins with NASA On The Air for a Special Event Oct. 19, 2018: Amateur Radio OnThe International Space Station (ARISS) is planning a very special Slow Scan TV event currently scheduled to start October 27 about 10 am UTC. Helping to support the event will be NASA’s Space, Communication and Navigation (SCaN) Dept. The Space Communications and Navigation (SCaN) program manages NASA’s three most important communications networks. The Space Network (SN), Near Earth Network (NEN), and the Deep Space Network (DSN. Just as in past ARISS SSTV commemorations, 12 images will be downlinked, but this time with 6 featuring the SCaN educational activities while the other 6 images will commemorate major NASA anniversaries, ie when NASA was established, astronauts first landing on the moon, etc. In addition to the fun of receiving these images, participants can qualify for a special endorsement for the NASA On The Air (NOTA) celebration event. To learn more about NOTA, visit ( https://nasaontheair.wordpresscom). Once received, Images can be posted and viewed athttp://www. spaceflightsoftware.com/ARISS_SSTV/index.php .The transmissions are expected to be broadcast at the usual frequency of 145.800 MHz using the PD-120 SSTV mode. Please note that the event is dependent on other activities, schedules and crew responsibilities on the ISS and are subject to change at any time. More information will follow soon, so please continue to check for news and the most current information on the AMSAT.org and ARISS.org websites, theAMSAT-BB(a)amsat.org, the ARISS facebook at Amateur Radio On The International Space Station (ARISS) and ARISS twitter @ARISS_status. 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 theInternational 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 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. Also join us on Facebook: Amateur Radio on the International Space Station (ARISS) Follow us on Twitter: ARISS_status Media Contact: Dave Jordan, AA4KN ARISS PR Get Outlook for Android

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Re: [amsat-bb] Need spare parts for Yaesu G-5500 azimuth motor
by David J. Schmocker 20 Oct '18

20 Oct '18

Dear A.Tahir: Through a telephone call, I also learned this: The USA Yaesu office has changed the old P/N 8000379 to new P/N S800947 (same part, new number) and The USA Yaesu office has this part in stock (cost several US Dollars plus shipping). Perhaps the U.K. Office may also (have the part in stock)? I hope this helps! Very 73, Dave KJ9I On 10/19/18, 9:20 AM, "AMSAT-BB on behalf of Gregory Beat via AMSAT-BB" <amsat-bb-bounces(a)amsat.org on behalf of amsat-bb(a)amsat.org> wrote: >The Yaesu antenna rotator product line was purchased from KenPro Electric >(Japan) in 1990s. Until the 2011 T?hoku earthquake and tsunami, these >antenna rotators were manufactured in Japan. There were shortages (see >KB5WIA below), as Yaesu had to replace some OEM suppliers, and prices >rose afterward. >https://en.m.wikipedia.org/wiki/2011_T?hoku_earthquake_and_tsunami > >While you could order replacement parts from Yaesu HQ (Japan), >http://www.yaesu.com/jp/amateur_index/index.html >there are regional Yaesu centers that can order these parts for you >IF the regional center does not have "in stock". > >In Europe, Yaesu has a regional center in the United Kingdom (UK). >http://www.yaesu.co.uk/contact_us.php >Yaesu (UK) Ltd >Unit 12 >Sun Valley Business Park >Winnall Close >Winchester >SO23 0LB >United Kingdom >+44 (0)1962 866667 >For Service enquiries please email : service(a)yaesu.co.uk >This email page is for Yaesu Amateur and Airband products only. >-- >You can use Alibaba or Google, >BUT you MUST know the specifications of the Pinion Gear. >-- >KHK Gears >https://khkgears.net/new/plastic_gears.html >Kohara Gear Industry Co.,Ltd. (Japan) >13-17 Nakacho Kawaguchi-shi Saitama-ken, 332-0022, Japan >TEL : +81 48 254 1744 FAX : +81 48 254 1765 >How to Select KHK Gears >https://khkgears.net/new/how_to_select_gears.html >== >Rebuilding / Rewinding the Yaesu G-5500 azimuth motor (March 2012) >by KB5WIA >http://kb5wia.blogspot.com/2012/03/yaesu-g5500-rotator-motor-repair.html > >Yaesu G-5500 Elevation rotator repair/restoration >by Ivo Klinkert, PA1IVO >https://ivok.home.xs4all.nl/pa1ivo/G-5500.html >== > >73, greg >w9gb >== >>>Original Message >I need a replacement plastic pinion gear used in the motor. I could not >find a spare parts source for this gear. >The Yaesu G-5500 Service Manual on Page 13, Rotator Section picture >indicates this heat is part 21, *pinion gear and WXSTD P/N :is 8000379* >- >I want to pay and order this part, if I know the source. >IF you have an extra one or you know a parts source for this part, >I need their contact address, e-mail, and telephone order. > >A.Tahir DENGIZ (TA2T) >e-mail : atdengiz(a)gmail.com >Golbasi ANKARA - TURKEY >== >_______________________________________________ >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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JOTA-JOTI FUNcube Challenge + Colloquium Videos
by M5AKA 19 Oct '18

19 Oct '18

During JOTA-JOTI a special, coded, message will be transmitted from the FUNcube-1 (AO73) satellite. The message is coded using the Enigma cipher machine. The deciphering key and Enigma settings can be obtained by answering a set of questions https://amsat-uk.org/2018/10/19/the-jota-joti-funcube-challenge/ Video of talk at AMSAT-UK Colloquium / RSGB Convention Milton Keynes ARISS Report by Ciaran Morgan M0XTD and Eleanor Griffin M6NWZ given Saturday, Oct 13, 2018 https://www.youtube.com/watch?v=cgwnmx-gxOE Trevor M5AKA---- AMSAT-UK http://amsat-uk.org/ Twitter https://twitter.com/AmsatUK Facebook https://facebook.com/AmsatUK YouTube https://youtube.com/AmsatUK ----

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