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

Re: m^2 436 cp antenna
by Tim Campbell 25 Dec '23

25 Dec '23

I will second Joe's suggestion. It's the best penetrant I have ever used. If you can't get them loose after soaking them for a while, you can try the appropriate size LEFT hand drill bit. Sometimes the left hand bit will spin the set screws out. Drill carefully or you will quickly mess up the aluminum threads. Worst case scenario is carefully cut them off the elements and install new shorting bar kits as part of the refurbishment. M2 sells them as replacement parts. Merry Christmas es 73, Tim KB2MFS <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free.www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Mon, Dec 25, 2023 at 7:16 AM Joseph B. Fitzgerald via AMSAT-BB < amsat-bb(a)amsat.org> wrote: > https://www.kroil.com/ > > de KM1P Joe > > > ----------------------------------------------------------- > > 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/amsat-bb@amsat.org > 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: m^2 436 cp antenna
by Joseph B. Fitzgerald 25 Dec '23

25 Dec '23

https://www.kroil.com/ de KM1P Joe

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m^2 436 cp antenna
by nick 25 Dec '23

25 Dec '23

I am trying to refurbish my M^2 antenna and the se screws on the shorting bar are frozen. Any suggestions how to free up the set screws? nick Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School Disagree I Learn

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Re: G-5500 Elevation Meter Stopped Working
by kf4hr3＠yahoo.com 25 Dec '23

25 Dec '23

Andrew - If the Az and El motors are working, but the meter indication(s) are not, first check to make sure all the wires are properly attached. Also check to make sure all the cable connections are soldered properly inside the rotor. If the wiring visually checks out fine you probably have a dirty or defective feedback potentimeter. Butch, KF4HR On Sunday, December 24, 2023 at 06:03:25 PM EST, Andrew Katz via AMSAT-BB <amsat-bb(a)amsat.org> wrote:  Hi All, Recently purchased a second-hand G-5500 for satellite work and just got it up and running this week. All seemed to test fine, but today I noticed that theelevation meter appears to have stopped working….I can manually raise and lower the antennas but the meter barely moves. No issue with the AZ meter, and most importantly, since I’m controlling it via PST-Rotator, it seems to still be working, i.e. steering / working without any problem in EL & AZ (via interface), so I’m still on the air. I doubt I’ll be able to diagnose and/or fix the issue myself, but wondering if anyone had experience with this and had guidance. Would love to get it fixed. Thanks, Andrew – W3TI ----------------------------------------------------------- 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/amsat-bb@amsat.org 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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G-5500 Elevation Meter Stopped Working
by Andrew Katz 25 Dec '23

25 Dec '23

Hi All, Recently purchased a second-hand G-5500 for satellite work and just got it up and running this week. All seemed to test fine, but today I noticed that the elevation meter appears to have stopped working….I can manually raise and lower the antennas but the meter barely moves. No issue with the AZ meter, and most importantly, since I’m controlling it via PST-Rotator, it seems to still be working, i.e. steering / working without any problem in EL & AZ (via interface), so I’m still on the air. I doubt I’ll be able to diagnose and/or fix the issue myself, but wondering if anyone had experience with this and had guidance. Would love to get it fixed. Thanks, Andrew – W3TI

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Re: Need advice on circular polarized antennas
by kf4hr3＠yahoo.com 24 Dec '23

24 Dec '23

Joe - my system consists of the M2 LEOPACK VHF/UHF yagi system, Yaesu Az/El Rotator, IC-9700, S.A.T Interface, and ARR 160w RF sensing VHF & UHF Preamplifiers. The LEOPACK is a small and light weight antenna system that performs well. I installed the optional Circular Polarization Switching elements on both M2 yagi's. I've found switching Polarization sometimes makes no difference at all, although other times switching to the opposite circular polarization makes a major difference. Butch, KF4HR On Sunday, December 24, 2023 at 01:18:03 PM EST, Kevin Schuchmann via AMSAT-BB <amsat-bb(a)amsat.org> wrote: Joe, I used to run those antennas, they are compact and work well. I also had the switch boxes and had a slide switch box inside to control them. There were times when it was handy to be able to do HORZ VERT LHCP RHCP with a flip of the switch but it depends on how you are planning to use them. 73 Kevin WA7FWF On Sunday, December 24th, 2023 at 9:08 AM, Joseph Amato via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > > I’m looking for some advice on antennas for 2 m/70 cm satellite operation. Presently, I have home-brew yagis for each band, horizontally polarized. To eliminate fading due to satellite rotation, I want to replace these antennas with circularly polarized ones. But the new antennas need to be relatively lightweight, because I have to lug them up on a ladder to mount them, and, well, I’m not as young as I used to be. I have been considering the WiMo circular polarized antennas (#18010 and 18011), but would first like to hear from people who have experience with them. I like to build things myself, but the WiMo design looks cleverer than anything I’ve been able to come up with so far. Any advice? Thanks! > > Joe K1MNY > > ----------------------------------------------------------- > > 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/amsat-bb@amsat.org > 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/amsat-bb@amsat.org 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: Need advice on circular polarized antennas
by Eduardo PY2RN 24 Dec '23

24 Dec '23

Just make it polarization switchable: vertical / horizontal, simpler and almost same result. 73 Merry Christmas to all. Ed PY2RN On Sunday, December 24, 2023 at 02:08:32 PM GMT-3, Joseph Amato via AMSAT-BB <amsat-bb(a)amsat.org> wrote: I’m looking for some advice on antennas for 2 m/70 cm satellite operation. Presently, I have home-brew yagis for each band, horizontally polarized. To eliminate fading due to satellite rotation, I want to replace these antennas with circularly polarized ones. But the new antennas need to be relatively lightweight, because I have to lug them up on a ladder to mount them, and, well, I’m not as young as I used to be. I have been considering the WiMo circular polarized antennas (#18010 and 18011), but would first like to hear from people who have experience with them. I like to build things myself, but the WiMo design looks cleverer than anything I’ve been able to come up with so far. Any advice? Thanks! Joe K1MNY ----------------------------------------------------------- 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/amsat-bb@amsat.org 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 | | Virus-free.www.avast.com |

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TEVEL-7
by david.greenberg 24 Dec '23

24 Dec '23

Hello All, TEVEL-7 FM transponder has been activated, starting from today, 24.12.23 18:42U for 72 hours.73,David 4X1DGנשלח מה-Galaxy שלי

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Re: Need advice on circular polarized antennas
by Kevin Schuchmann 24 Dec '23

24 Dec '23

Joe, I used to run those antennas, they are compact and work well. I also had the switch boxes and had a slide switch box inside to control them. There were times when it was handy to be able to do HORZ VERT LHCP RHCP with a flip of the switch but it depends on how you are planning to use them. 73 Kevin WA7FWF On Sunday, December 24th, 2023 at 9:08 AM, Joseph Amato via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > > I’m looking for some advice on antennas for 2 m/70 cm satellite operation. Presently, I have home-brew yagis for each band, horizontally polarized. To eliminate fading due to satellite rotation, I want to replace these antennas with circularly polarized ones. But the new antennas need to be relatively lightweight, because I have to lug them up on a ladder to mount them, and, well, I’m not as young as I used to be. I have been considering the WiMo circular polarized antennas (#18010 and 18011), but would first like to hear from people who have experience with them. I like to build things myself, but the WiMo design looks cleverer than anything I’ve been able to come up with so far. Any advice? Thanks! > > Joe K1MNY > > ----------------------------------------------------------- > > 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/amsat-bb@amsat.org > 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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Need advice on circular polarized antennas
by Joseph Amato 24 Dec '23

24 Dec '23

I’m looking for some advice on antennas for 2 m/70 cm satellite operation. Presently, I have home-brew yagis for each band, horizontally polarized. To eliminate fading due to satellite rotation, I want to replace these antennas with circularly polarized ones. But the new antennas need to be relatively lightweight, because I have to lug them up on a ladder to mount them, and, well, I’m not as young as I used to be. I have been considering the WiMo circular polarized antennas (#18010 and 18011), but would first like to hear from people who have experience with them. I like to build things myself, but the WiMo design looks cleverer than anything I’ve been able to come up with so far. Any advice? Thanks! Joe K1MNY

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