June 2024 - AMSAT-BB - mailman.amsat.org

Re: Yaesu G-5500 issue
by Burns Fisher 26 Jun '24

26 Jun '24

I have power wires to a preamp running through a PVC conduit and have had mice get in and chew them through. So that is one guess--mice on the potentiometer power. Another possibility is that there was a nearby lightning strike over the winter and it opened up your surge protector. Or if you don't have one, maybe that blew the S.A.T. 73, Burns WB1FJ On Sun, Jun 23, 2024 at 11:33 AM mikflathead--- via AMSAT-BB < amsat-bb(a)amsat.org> wrote: > Do you have any angry squirrels? > > On Sunday, June 23, 2024 at 10:51:42 AM EDT, Jim McCullers via AMSAT-BB < > amsat-bb(a)amsat.org> wrote: > > > Jeff, > > > > Remove the wires connected to terminal positions 1, 2, and three on both > the Al and Ez connectors on the back of the G-5500. > > Make certain you label them or take a photo for reinstallation. > > > > With the G-5500 powered on, measure from terminal 1 to terminal 3 on each > connector using volt meter. > > You should read 6 volts +/- a fraction. > > Both Al and Ez are powered by the same circuit. If there is no reading or > the reading is way off, then the voltage regulator in the G-5500 has failed. > > > > If the voltage appears correct, using an ohm meter on a low scale measure > between the wires that were connected to terminals 1 and 3 on both > connectors. > > You should read about 500 ohms or so. > > Then measure between the wire that connected to terminal 2 on each > connector to the terminal 1 wire then the terminal 3 wire. > > The sum of the two should be in the range of the value you read between > wires 1 and 3. > > If you read a short (low ohms) or infinity that indicates damage to the > cable from the rotor to the controller. > > Recheck all connections. > > > > It’s difficult to believe both Az and El pots would fail at the same time > so I would lean to either cable damage or a bad regulator on the G-5500 > board. > > > > Good luck and please post your results. > > > > Jim McCullers > > WA4CWI > > ----------------------------------------------------------- > > 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. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org > > ----------------------------------------------------------- > > 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. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org

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Re: Yaesu G-5500 issue
by Joe Fitzgerald 26 Jun '24

26 Jun '24

Jeff, I am suspicious that when that regulator failed, it damaged the op-amps that drive the meters. Consider probing around from the rotor connections through that meter drive circuitry to see where the signal levels stop making sense. Fortunately it looks like replacement op amps are cheap, I saw what look like viable replacements at Digi-Key for $0.54. de KM1P Joe

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Re: Yaesu G-5500 issue
by graham＠shirville.com 26 Jun '24

26 Jun '24

Uuum …I thought the regulators are ?6V ones? 73 Graham G3VZV From: jeff griffin via AMSAT-BB <amsat-bb(a)amsat.org> Sent: Wednesday, June 26, 2024 4:57 PM To: amsat-bb(a)amsat.org Subject: [AMSAT-BB] Re: Yaesu G-5500 issue Ok here's what I got so far. First thing is the failed voltage regulator is/was a LM7812C, a 12v regulator. So I replaced it with the same. Now when I turn on the control box I get a 12v reading between 1 and 3, and now both meters are pinned full scale. So I hooked up the elevation side and the rotor is of course still working but the meters stay pinned full scale. I tried to adjust the full scale and out voltage Adj on the back and they have no effect on the meter reading. Anyone have any ideas? Thanks everyone for all the good input so far, we're getting there... 73 Jeff kb2m

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Re: Yaesu G-5500 issue
by jeff griffin 26 Jun '24

26 Jun '24

Ok here's what I got so far. First thing is the failed voltage regulator is/was a LM7812C, a 12v regulator. So I replaced it with the same. Now when I turn on the control box I get a 12v reading between 1 and 3, and now both meters are pinned full scale. So I hooked up the elevation side and the rotor is of course still working but the meters stay pinned full scale. I tried to adjust the full scale and out voltage Adj on the back and they have no effect on the meter reading. Anyone have any ideas? Thanks everyone for all the good input so far, we're getting there... 73 Jeff kb2m

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ARISS News Release No. 24-32
by David H Jordan 24 Jun '24

24 Jun '24

*ARISS News Release No.24-32* *Dave Jordan, AA4KN * *ARISS PR* *aa4kn(a)amsat.org <aa4kn(a)amsat.org>* *FOR IMMEDIATE RELEASE* *ARISS Contact is Scheduled with Students at * *The Educational Complex Nuestra Señora de Fátima No 1139 and No 8119, Pérez, Argentina* June 24, 2024—Amateur Radio on the International Space Station (ARISS) has received schedule confirmation for an ARISS radio contact between an astronaut aboard the International Space Station (ISS) and students at the Complejo Educativo Nuestra Señora de Fátima located in Pérez, Argentina. ARISS conducts 60-100 of these special amateur radio contacts each year between students around the globe and crew members with ham radio licenses aboard the ISS. The Educational Complex Nuestra Señora de Fátima, (comprised of schools No. 1139 and No. 8119) is a comprehensive educational institution covering primary and secondary levels. The school fosters students’ interest in and vocational development in the sciences by implementing a series of activities, such as their annual workshops on physical and chemical phenomena. These workshops promote discovery through experimentation and allows students to explore and understand the fundamental principles that govern these two sciences. Among the topics covered for the 6th grade program are the scientific method, experiments on energy transfer, waves, sound and light, telescopes, and setting up a weather station. The 7th Grade program covers the solar system, Earth-Moon-Sun system, Moon landings, the ISS and life in space, the importance of caring for the Earth, celestial maps and constellations, stars, star clusters, nebulae, and galaxies. The schools collaborate with a group of amateur radio operators and astronomy enthusiasts, which allows student access to expert and specialized guidance. This will be a telebridge Contact via Amateur Radio allowing students to ask their questions of astronaut Jeanette Epps, amateur radio call sign KF5QNU. The downlink frequency for this contact is 145.800 MHz and may be heard by listeners that are within the ISS-footprint that also encompasses the telebridge station. The ARISS amateur radio ground station (telebridge station) for this contact is in Meadow Spring, Australia. The amateur radio volunteer team at the ground station will use the callsign VK6MJ, to establish and maintain the ISS connection. The ARISS radio contact is scheduled for June 27, 2024 at 10:38 am ART (Pérez, Argentina) (13:38 UTC, 9:38 am EDT, 8:38 am CDT, 7:38 am MDT, 6:38 am PDT). *_______________________________* As time allows, students will ask these questions: 1. What can you see through a window that doesn’t face Earth? 2. How do astronauts readapt to living on Earth after returning from space? 3. What happens if an astronaut is left floating in space without anything to hold onto? 4. How do you cut your hair? 5. Are there any smells in space? What does space smell like? 6. What’s the first thing you would like to do when you return to the Earth? 7. What do you do if an astronaut gets sick? Are illnesses different in space? 8. What happens if there is an accident? 9. How does being in space affect sleep? 10. What is the most amazing thing you can do in space? 11. What inspired you to become an astronaut? 12. What’s the most beautiful thing astronauts have seen on the ISS? 13. Does the Sun affect you when you go into space? How? 14. Can astronauts cry in space? Can your tears drop? 15. How do astronauts film outside the ISS? 16. How has being an astronaut affected personal relationships? 17. How does it feel to be in space for 6 months or more? 18. How did you prepare to become an astronaut? *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 ISS. In the United States, sponsors are the American Radio Relay League (ARRL), Amateur Radio Digital Communications (ARDC), Radio Amateur Satellite Corporation (AMSAT), NASA’s Space Communications and Navigation program (SCaN) and the ISS National Lab—Space Station Explorers. The primary goal of ARISS is to promote exploration of science, technology, engineering, the arts, and mathematics topics. ARISS does this by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students. Before and during these radio contacts, students, educators, parents, and communities take part in hands-on learning activities tied to space, space technologies, and amateur radio. For more information, see http://www.ariss.org. Media Contact: Dave Jordan, AA4KN ARISS PR Find us on social media at: X: ARISS_Intl Facebook: facebook.com/ARISSIntl Instagram: ariss_intl Mastodon: ariss_intl(a)mastodon.hams.social Check out ARISS on Youtube.com.

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TEVEL-7
by david.greenberg 24 Jun '24

24 Jun '24

נשלח מה-Galaxy שליHello All, TEVEL-7 FM transponder has been activated, starting from today 24.06.24 19:27U for 72 hours.73,David 4X1DG

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Upcoming ARISS Contact Schedule as of 2024-06-24 19:00 UTC
by aj9n＠aol.com 24 Jun '24

24 Jun '24

Upcoming ARISS Contact Schedule as of 2024-06-24 19:00 UTC Quick list of scheduled contacts and events: Complejo Educativo Nuestra Señora de Fátima N° 1139 and N° 8119, Pérez, Argentina, Telebridge via VK6MJ The ISS callsign is presently scheduled to be NA1SS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Jeanette Epps KF5QNU The ARISS mentor is VE6JBJ Contact is go for: Thu 2024-06-27 13:38:07 UTC 56 deg Moroccan School of Engineering Sciences, Casablanca, Morocco, telebridge via VK6MJ (***) The ISS callsign is presently scheduled to be NA1SS (***) The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Jeanette Epps KF5QNU (***) The ARISS mentor is IN3GHZ Contact is go for: Mon 2024-07-01 12:02:01 UTC 60 deg (***) St. Luke’s College, Buenos Aires, Argentina, direct via LU4AA The ISS callsign is presently scheduled to be NA1SS (***) The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Mike Barratt KD5MIJ (***) The ARISS mentor is VE6JBJ Contact is go for: Wed 2024-07-03 14:42:53 UTC 82 deg (***) Watch for Livestreaming via their Instagram accounts: The school: @stlukes.college Radio Club Argentino: @rca_sociedad_nacional The crossband repeater continues to be active. If any crewmember is so inclined, all they have to do is pick up the microphone, raise the volume up, and talk on the crossband repeater. So give a listen, you just never 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 2024-06-24 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. 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 2024-06-06 17:00 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf ####################################################################################################################################### Comments on making general contacts I have been seeing a lot of traffic on Facebook and I suspect on other social media sites with people asking why they are not hearing the crew make general contacts. First off the crew is very busy on the ISS and they simply may not have the time to just pick up the microphone and talk. Also, one needs to be aware of their normal daily schedule. I have listed below the constraints that we at ARISS have to follow in order to schedule the school contacts. Hopefully this will help you better schedule your opportunities. Typical daily schedule Wakeup to Workday start= 1.5 hours Workday start to Workday end=12 hours Workday end to Sleep= 2 hours Sleep to wakeup= 8.5 hours The crew's usual waking period is 07:30 – 19:30 UTC. The most common times to find a crew member making casual periods are about one hour after waking up and about an hour before sleeping, when they have personal time. They're usually free most of the weekend, as well. SSTV events are not that often. So please check out https://www.ariss.org/ for the latest information or watch for the ARISS announcements. And don’t forget that the packet system is sometimes active. Check the status at https://www.ariss.org/ or http://www.issfanclub.eu to see if the packet system is active or not. As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol. The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html ######################################################################################################################################## 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. Watch for future COVID-19 related announcements at https://www.ariss.org/ 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/ 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) Call for Proposals The next proposal window for US schools and educational organizations to host an Amateur Radio contact with a crew member on board the ISS opens April 8, 2024 for contacts to be scheduled for January 1, 2025 – June 30, 2025. This proposal window is due to ARISS by May 19, 2024 at 11:59 PM Pacific Time. Proposal information and more details such as expectations, proposal guidelines and the proposal form can be found at www.ariss.org. Find more information and proposal instructions, visit the ARISS-USA website at: https://ariss-usa.org/hosting-an-ariss-contact-in-the-usa/ Please direct any questions to ariss.us.education(a)gmail.com. 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. 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 unless otherwise noted. ******************************************************************************* 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 is back on board but awaiting re-installation. 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 congratulates the following mentors who have now mentored over 100 schools: Sergey RV3DR with 239 Francesco IKØWGF with 154 Satoshi 7M3TJZ with 150 Gaston ON4WF with 124 Peter IN3GHZ with 118 Steve VE3TBD with 106 **************************************************************************** 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 1729. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1634. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 48. 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, 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, FXØISS, GB1SS, 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. 70 on orbit Oleg Kononenko Nikolay Chub Exp. 71 on orbit Tracy E. Caldwell Dyson SpaceX Crew-8 on orbit Matthew Dominick KCØTOR Mike Barratt KD5MIJ Jeanette Epps KF5QNU Aleksandr Grebyonkin RZ3DSE **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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Re: Yaesu G-5500 issue
by Jim McCullers 23 Jun '24

23 Jun '24

Jeff, Remove the wires connected to terminal positions 1, 2, and three on both the Al and Ez connectors on the back of the G-5500. Make certain you label them or take a photo for reinstallation. With the G-5500 powered on, measure from terminal 1 to terminal 3 on each connector using volt meter. You should read 6 volts +/- a fraction. Both Al and Ez are powered by the same circuit. If there is no reading or the reading is way off, then the voltage regulator in the G-5500 has failed. If the voltage appears correct, using an ohm meter on a low scale measure between the wires that were connected to terminals 1 and 3 on both connectors. You should read about 500 ohms or so. Then measure between the wire that connected to terminal 2 on each connector to the terminal 1 wire then the terminal 3 wire. The sum of the two should be in the range of the value you read between wires 1 and 3. If you read a short (low ohms) or infinity that indicates damage to the cable from the rotor to the controller. Recheck all connections. It's difficult to believe both Az and El pots would fail at the same time so I would lean to either cable damage or a bad regulator on the G-5500 board. Good luck and please post your results. Jim McCullers WA4CWI

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Re: Yaesu G-5500 issue
by mikflathead＠aol.com 23 Jun '24

23 Jun '24

Do you have any angry squirrels? On Sunday, June 23, 2024 at 10:51:42 AM EDT, Jim McCullers via AMSAT-BB <amsat-bb(a)amsat.org> wrote: Jeff, Remove the wires connected to terminal positions 1, 2, and three on both the Al and Ez connectors on the back of the G-5500. Make certain you label them or take a photo for reinstallation. With the G-5500 powered on, measure from terminal 1 to terminal 3 on each connector using volt meter. You should read 6 volts +/- a fraction. Both Al and Ez are powered by the same circuit. If there is no reading or the reading is way off, then the voltage regulator in the G-5500 has failed. If the voltage appears correct, using an ohm meter on a low scale measure between the wires that were connected to terminals 1 and 3 on both connectors. You should read about 500 ohms or so. Then measure between the wire that connected to terminal 2 on each connector to the terminal 1 wire then the terminal 3 wire. The sum of the two should be in the range of the value you read between wires 1 and 3. If you read a short (low ohms) or infinity that indicates damage to the cable from the rotor to the controller. Recheck all connections. It’s difficult to believe both Az and El pots would fail at the same time so I would lean to either cable damage or a bad regulator on the G-5500 board. Good luck and please post your results. Jim McCullers WA4CWI ----------------------------------------------------------- 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. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Re: Yaesu G-5500 issue
by Jim McCullers 23 Jun '24

23 Jun '24

Jeff, Remove the wires connected to terminal positions 1, 2, and three on both the Al and Ez connectors on the back of the G-5500. Make certain you label them or take a photo for reinstallation. With the G-5500 powered on, measure from terminal 1 to terminal 3 on each connector using volt meter. You should read 6 volts +/- a fraction. Both Al and Ez are powered by the same circuit. If there is no reading or the reading is way off, then the voltage regulator in the G-5500 has failed. If the voltage appears correct, using an ohm meter on a low scale measure between the wires that were connected to terminals 1 and 3 on both connectors. You should read about 500 ohms or so. Then measure between the wire that connected to terminal 2 on each connector to the terminal 1 wire then the terminal 3 wire. The sum of the two should be in the range of the value you read between wires 1 and 3. If you read a short (low ohms) or infinity that indicates damage to the cable from the rotor to the controller. Recheck all connections. It’s difficult to believe both Az and El pots would fail at the same time so I would lean to either cable damage or a bad regulator on the G-5500 board. Good luck and please post your results. Jim McCullers WA4CWI

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