September 2023 - AMSAT-BB - mailman.amsat.org

Re: Linear vs FM Sats
by Erik Eitel 04 Sep '23

04 Sep '23

David, thank you for the comprehensive answers! I think I have the info that I need now. Part of the problem is lack of experience on the linear sats, so I may just be thinking I have a problem when in fact I am not operating properly… Thank you to Russel, Ray and AJ as well! I appreciate all of the info! 73 Erik K2ERK - FN20 > On Sep 4, 2023, at 14:40, David Spoelstra via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > When operating v/u where should the filter go? 70cm side. > Does it matter if I am operating FM or linear as far as desense is concerned? If you are having desense, you are having it regardless of the mode. You may not notice it with the FM birds because their transmitters are so strong and because of the FM capture effect. > Can I use the diplexer in the Arrow antenna as a filter? Yes, however there are several issues with it: > 1. It can only handle 10 watts. > 2. I don't know how good the separation is with regard to the Comet (or others) in the AMSAT article Ray KN2K referred you to. > 3. It has a 2m pigtail that might (probably?) pickup some of the 2m energy transmitted and feed it back to the 70cm side which will desense it and defeat what you are trying to accomplish like the article says. > > -David, N9KT > > > On Mon, Sep 4, 2023 at 1:10 PM Erik Eitel via AMSAT-BB <amsat-bb(a)amsat.org <mailto:[email protected]>> wrote: > I am fairly new to chasing satellites. I have the FM sats down fairly well and I am trying to get into the linear birds. > > Here’s my set up: > > -Arrow antenna with diplexer mounted on bike repair stand. > -ICOM 2730a (I used this with great success on the FM sats) > -2 Yaesu FT-818 (replacing the 2730 for all sats) > > I’ve read many articles and visited many web pages but I am confused a bit with desense. > When operating v/u where should the filter go? On the 2m side or the 70cm side? > Does it matter if I am operating FM or linear as far as desense is concerned? I have no problem hearing myself while operating FM v/u sats using the FT-818s. > Can I use the diplexer in the Arrow antenna as a filter? > > Still trying to get the hang of the linear birds. > > Thanks for the help. > > > 73 > Erik > K2ERK - FN20 > > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org <http://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/ <https://www.amsat.org/about-amsat/> > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] <https://mailman.amsat.org/hyperkitty/list/[email protected]> > To unsubscribe send an email to amsat-bb-leave(a)amsat.org <http://amsat.org/> > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org <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: Linear vs FM Sats
by David Spoelstra 04 Sep '23

04 Sep '23

When operating v/u where should the filter go? 70cm side. Does it matter if I am operating FM or linear as far as desense is concerned? If you are having desense, you are having it regardless of the mode. You may not notice it with the FM birds because their transmitters are so strong and because of the FM capture effect. Can I use the diplexer in the Arrow antenna as a filter? Yes, however there are several issues with it: 1. It can only handle 10 watts. 2. I don't know how good the separation is with regard to the Comet (or others) in the AMSAT article Ray KN2K referred you to. 3. It has a 2m pigtail that might (probably?) pickup some of the 2m energy transmitted and feed it back to the 70cm side which will desense it and defeat what you are trying to accomplish like the article says. -David, N9KT On Mon, Sep 4, 2023 at 1:10 PM Erik Eitel via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > I am fairly new to chasing satellites. I have the FM sats down fairly > well and I am trying to get into the linear birds. > > Here’s my set up: > > -Arrow antenna with diplexer mounted on bike repair stand. > -ICOM 2730a (I used this with great success on the FM sats) > -2 Yaesu FT-818 (replacing the 2730 for all sats) > > I’ve read many articles and visited many web pages but I am confused a bit > with desense. > When operating v/u where should the filter go? On the 2m side or the 70cm > side? > Does it matter if I am operating FM or linear as far as desense is > concerned? I have no problem hearing myself while operating FM v/u sats > using the FT-818s. > Can I use the diplexer in the Arrow antenna as a filter? > > Still trying to get the hang of the linear birds. > > Thanks for the help. > > > 73 > Erik > K2ERK - FN20 > > > ----------------------------------------------------------- > > 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: Linear vs FM Sats
by Erik Eitel 04 Sep '23

04 Sep '23

Thank you, I have read that…doesn’t answer all of my questions but it was helpful. 73 Erik K2ERK - FN20 > On Sep 4, 2023, at 13:43, crohtun--- via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > See the following: > https://www.amsat.org/a-simple-desense-filter-for-mode-j-satellites/ <https://www.amsat.org/a-simple-desense-filter-for-mode-j-satellites/> > > 73, > > Ray KN2K > > > > Sent from the all new AOL app for iOS <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661> > > On Monday, September 4, 2023, 1:09 PM, Erik Eitel via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > I am fairly new to chasing satellites. I have the FM sats down fairly well and I am trying to get into the linear birds. > > Here’s my set up: > > -Arrow antenna with diplexer mounted on bike repair stand. > -ICOM 2730a (I used this with great success on the FM sats) > -2 Yaesu FT-818 (replacing the 2730 for all sats) > > I’ve read many articles and visited many web pages but I am confused a bit with desense. > When operating v/u where should the filter go? On the 2m side or the 70cm side? > Does it matter if I am operating FM or linear as far as desense is concerned? I have no problem hearing myself while operating FM v/u sats using the FT-818s. > Can I use the diplexer in the Arrow antenna as a filter? > > Still trying to get the hang of the linear birds. > > Thanks for the help. > > > 73 > Erik > K2ERK - FN20 > > > ----------------------------------------------------------- > > 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/ <https://www.amsat.org/about-amsat/> > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] <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 <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: Linear vs FM Sats
by crohtun＠aol.com 04 Sep '23

04 Sep '23

See the following:https://www.amsat.org/a-simple-desense-filter-for-mode-j-satellit… 73, Ray KN2K Sent from the all new AOL app for iOS On Monday, September 4, 2023, 1:09 PM, Erik Eitel via AMSAT-BB <amsat-bb(a)amsat.org> wrote: I am fairly new to chasing satellites. I have the FM sats down fairly well and I am trying to get into the linear birds. Here’s my set up: -Arrow antenna with diplexer mounted on bike repair stand.-ICOM 2730a (I used this with great success on the FM sats)-2 Yaesu FT-818 (replacing the 2730 for all sats) I’ve read many articles and visited many web pages but I am confused a bit with desense. When operating v/u where should the filter go? On the 2m side or the 70cm side?Does it matter if I am operating FM or linear as far as desense is concerned? I have no problem hearing myself while operating FM v/u sats using the FT-818s.Can I use the diplexer in the Arrow antenna as a filter? Still trying to get the hang of the linear birds. Thanks for the help. 73Erik K2ERK - FN20 ----------------------------------------------------------- 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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Linear vs FM Sats
by Erik Eitel 04 Sep '23

04 Sep '23

I am fairly new to chasing satellites. I have the FM sats down fairly well and I am trying to get into the linear birds. Here’s my set up: -Arrow antenna with diplexer mounted on bike repair stand. -ICOM 2730a (I used this with great success on the FM sats) -2 Yaesu FT-818 (replacing the 2730 for all sats) I’ve read many articles and visited many web pages but I am confused a bit with desense. When operating v/u where should the filter go? On the 2m side or the 70cm side? Does it matter if I am operating FM or linear as far as desense is concerned? I have no problem hearing myself while operating FM v/u sats using the FT-818s. Can I use the diplexer in the Arrow antenna as a filter? Still trying to get the hang of the linear birds. Thanks for the help. 73 Erik K2ERK - FN20

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ARISS News Release No. 23-44
by David Jordan 04 Sep '23

04 Sep '23

ARISS News Release No.23-44 Dave Jordan, AA4KN ARISS PR aa4kn(a)amsat.org FORIMMEDIATE RELEASE ARISSContact is Scheduled with Students at Egemen Yildiz Secondary School, İzmir, Turkey September4, 2023—Amateur Radio on the International Space Station (ARISS) has receivedschedule confirmation for an ARISS radio contact between an astronaut aboardthe International Space Station (ISS) and students at Egemen Yildiz SecondarySchool in İzmir, Turkey. ARISS conducts60-80 of these special amateur radio contacts each year between students aroundthe globe and crew members with ham radio licenses aboard the ISS. Egemen Yıldız Secondary School is a K-12 school with 500students and 35 teachers. All students ages 12 through 16 years and teachers areinvolved in this ARISS contact event. The school provides a STEAM curriculumand project-based programs as well as a student Space Club, and Science Club.Prior to this contact, students also learned about space in workshops using lego-robotics. Members of the Turkish Amateur Ham Radio Association (TRAC) havepartnered with the school to support this ARISS contact and by providing aseminar on how to use Ham Radio and the importance of Ham Radio duringemergencies. Students participated in ham radio communications under the TRACteam guidance and their supplied equipment during after-school activities. This will be a telebridge Contact via Amateur Radio allowing students to ask theirquestions of Astronaut Jasmin Moghbeli, amateur radio call sign KI5WSL. Thedownlink frequency for this contact is 145.800 MHz and may be heard bylisteners that are within the ISS-footprint that also encompasses thetelebridge station. The ARISS amateur radio ground station(telebridge station) for this contact is in Greenbelt, Maryland, U.S. Theamateur radio volunteer team at the ground station will use the callsign K6DUE,to establish and maintain the ISS connection. TheARISS radio contact is scheduled for September 6, 2023 at 1:35:27 pm TRT (Turkey)(10:35:27 UTC, 6:35 am EDT, 5:35 am CDT, 4:35am MDT, 3:35 am PDT). _______________________________ Astime allows, students will ask these questions: 1.How do you define the world from space? 2.What is the most enjoyable experience you had in space? 3.What do you usually miss in space? 4.What do you do in an emergency in space? 5.Aren't you afraid of being in space? 6.How do you feel when you are in space? 7.What is space like? 8.Is living in spacewas what youexpected? 9.What does the earth look like from space? 10.How did you feel leaving the atmosphere? 11.What would you do if you were out of your essential materials? 12.What experiments are you trying on ISS as your mission? 13.What are the differences between life in space and the life on Earth? 14.Does space smell? 15.Does space have an effect on your internal organs and what? 16.What is your favorite food on the space station? 17.How do you wash your clothes on ISS? 18.Which planet would you most like to visit in space? 19.Is it comfortable sleeping in space? 20.Do you have internet in space? About ARISS: Amateur Radio on the InternationalSpace Station (ARISS) is a cooperative venture of international amateur radiosocieties and the space agencies that support the International Space Station(ISS). In the United States, sponsors are the American Radio Relay League(ARRL), Amateur Radio Digital Communications (ARDC), Radio Amateur SatelliteCorporation (AMSAT), NASA’s Space Communications and Navigation program (SCaN)and the ISS National Lab—Space Station Explorers. The primary goal of ARISS isto promote exploration of science, technology, engineering, the arts, andmathematics topics. ARISS does this by organizing scheduled contacts viaamateur radio between crew members aboard the ISS and students. Before andduring these radio contacts, students, educators, parents, and communities takepart in hands-on learning activities tied to space, space technologies, andamateur radio. For more information, see http://www.ariss.org MediaContact: DaveJordan, AA4KN ARISSPR Findus on social media at: Twitter:ARISS_Intl Facebook:facebook.com/ARISSIntl Instagram:ariss_intl Mastodon:[email protected] Checkout ARISS on Youtube.com.

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HOW TO DECODE IO-117 (GREENCUBE) TELEMETRY
by michael sartoretti 04 Sep '23

04 Sep '23

HOW TO DECODE IO-117 (GREENCUBE) TELEMETRY https://youtu.be/9N4mLp3iLDI

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TEVEL-6,7
by david.greenberg 03 Sep '23

03 Sep '23

Hello All, TEVEL-6,7 FM transponders have been activated, starting from today, 03.09.23 19:05U for 72 hours.73,David 4X1DGנשלח מה-Galaxy שלי

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Re: WiMo 18111 X pol 2m Yagi Reflector Elements
by Göran SM0IKR 03 Sep '23

03 Sep '23

I have one and will check it up for you. 73 George Den 2023-08-30 kl. 13:11, skrev K4IDC via AMSAT-BB: > > Maybe someone on the list has some experience to offer on the > issue described below. I've made the same inquiry with WiMo but no > response yet. > > I have the antenna in the subject line (10 element cross pol for > 2m) which I acquired in new condition from a fellow U.S. ham, > unassembled. All the packing seemed original and no parts seemed > to be missing. None of the plastic bags for the different parts > had been opened. > There are 8 pairs of elements, 2 each of specific lengths, which I > believe must be the directors; no problem there. > > Then there are two folded dipole driven elements with integrated > feedpoints and N female connectors, no problem there. > > There are two more elements, each of a different length and > neither longer than the longest element in the > matched director pairs; one is 92cm & the other is 89cm long, and > both shorter than the driven elements. If these are intended to be > the reflectors, shouldn't they be the same length and longer than > the driven elements? > The folded dipole driven elements I received measure > 94.3cm (37-1/8") & 94cm (37") end to end. I would think the > reflectors should be longer, but the only two elements remaining > to be installed are the two of different lengths and both shorter > than the driven elements AND shorter than the longer > directors...curious. > > Photos here: https://photos.app.goo.gl/MYBEPwJaUV6WAvPS7 > Please advise if you have any knowledge to share. > > > > Thanks, > Robin Midgett K4IDC > > ----------------------------------------------------------- > > 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 athttps://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 athttps://mailman.amsat.org

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Re: ***SPAM?*** (3.212) Re: TEVEL SATELLITES
by Göran SM0IKR 03 Sep '23

03 Sep '23

Nice to see Florian . Hope you get it going. 73 George SM0IKR Den 2023-09-02 kl. 11:15, skrev Florian (DF2ET) via AMSAT-BB: > Hi David, > > just hacking a small dashboard-like view to keep track of when TEVELs > are activated and when the timer expires. Is there any publicly > available source for times of activation that I could scrape the info > from besides Twitter? > > vy73 de Florian DF2ET > > > > > ----------------------------------------------------------- > > 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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