Speaking of AO-10 - Has anybody given a listen for the old girl lately?
73, Gary "Joe", kk0sd
-----Original Message----- From: Jim Walls jim@k6ccc.org Sent: Saturday, March 6, 2021 9:54 PM To: amsat-bb@amsat.org Subject: [AMSAT-BB] Re: TV rotor interface to SatPC32
On 03/06/2021 19:39, Robert Bruninga wrote:
In my opinion, you dont need elevation for any existing AMSAT nor do you need an OSCAR array since we have no HEO birds and LEO's are so close, there is 6 to 10 dB right there. And with nmodest beams, the beamwidth is wider than the inaccuracy in the rotator. My design simply used the 1 RPM rotatino of the motor to keep track of position and after each pass, or on edmand, it woiuld drive CW (or CCW) into the stops, zero the counter and then consider that zero and count from there. Tilt the beams up modestly to 15 degrees and you have plenty of gain. When the LEO satellite is above that it is 6 to 10 dB closer and plenty strong enough. And when it is below 15 degrees it is far away on the horizon and still totally within the main beam of the modest beam.
Low tech, but I'm NOT taking down my AO-10 class antennas just so I can use a low tech rotor controller.. Very happy with my FoxDelta ST2. Now to get the radio working and actually get back on the birds...
-- 73 ------------------------------------- Jim Walls - K6CCC jim@k6ccc.org Ofc: 818-548-4804 http://members.dslextreme.com/users/k6ccc/ AMSAT Member 32537 - WSWSS Member 395
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As a matter of fact I tried a couple of weeks ago with my small setup. I did not hear the beacon carrier (last I heard it several years ago it was just a single tone which changed with the slow rotation of the bird) on 145.812. I remember only having limited success in making contacts when she was nearing perigee AND was sunlit. Maybe someone else has had better luck recently???
Larry N1MIW
On Sun, Mar 7, 2021, 12:10 AM Gary gary_mayfield@hotmail.com wrote:
Speaking of AO-10 - Has anybody given a listen for the old girl lately?
73, Gary "Joe", kk0sd
-----Original Message----- From: Jim Walls jim@k6ccc.org Sent: Saturday, March 6, 2021 9:54 PM To: amsat-bb@amsat.org Subject: [AMSAT-BB] Re: TV rotor interface to SatPC32
On 03/06/2021 19:39, Robert Bruninga wrote:
In my opinion, you dont need elevation for any existing AMSAT nor do you need an OSCAR array since we have no HEO birds and LEO's are so close, there is 6 to 10 dB right there. And with nmodest beams, the beamwidth is wider than the inaccuracy in the rotator. My design simply used the 1 RPM rotatino of the motor to keep track of position and after each pass, or on edmand, it woiuld drive CW (or CCW) into the stops, zero the counter and then consider that zero and count from there. Tilt the beams up modestly to 15 degrees and you have plenty of gain. When the LEO satellite is above that it is 6 to 10 dB closer and plenty strong enough. And when it is below 15 degrees it is far away on the horizon and still totally within the main beam of the modest beam.
Low tech, but I'm NOT taking down my AO-10 class antennas just so I can use a low tech rotor controller.. Very happy with my FoxDelta ST2. Now to get the radio working and actually get back on the birds...
-- 73
Jim Walls - K6CCC jim@k6ccc.org Ofc: 818-548-4804 http://members.dslextreme.com/users/k6ccc/ AMSAT Member 32537 - WSWSS Member 395
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!
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. Not an AMSAT-NA member? Join now to support the amateur satellite program!
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
- =I agree with Bob. You don't need elevation in order to operate through any AMSAT LEO satellite. In fact, I operate CW on the linear birds with nothing more than a dual-band (2m/70cm) whip on a metal mount, on my roof. On an FM satellite, though, the biggest problem is uplink QRM. This has led to a regrettable situation in which too many people run too much EIRP. If you operate during unpopular times or when the satellite is above an ocean or other unpopulated area, the QRM won't be so bad. 73 Ray W2RS
From: z man zm1267@gmail.comt To: Gary gary_mayfield@hotmail.com Cc: amsat-bb@amsat.org Sent: Sat, Mar 6, 2021 11:38 pm Subject: [AMSAT-BB] Re: AO-10
As a matter of fact I tried a couple of weeks ago with my small setup. I did not hear the beacon carrier (last I heard it several years ago it was just a single tone which changed with the slow rotation of the bird) on 145.812. I remember only having limited success in making contacts when she was nearing perigee AND was sunlit. Maybe someone else has had better luck recently??? LarryN1MIW On Sun, Mar 7, 2021, 12:10 AM Gary gary_mayfield@hotmail.com wrote:
Speaking of AO-10 - Has anybody given a listen for the old girl lately?
73, Gary "Joe", kk0sd
-----Original Message----- From: Jim Walls jim@k6ccc.org Sent: Saturday, March 6, 2021 9:54 PM To: amsat-bb@amsat.org Subject: [AMSAT-BB] Re: TV rotor interface to SatPC32
On 03/06/2021 19:39, Robert Bruninga wrote:
In my opinion, you dont need elevation for any existing AMSAT nor do you need an OSCAR array since we have no HEO birds and LEO's are so close, there is 6 to 10 dB right there. And with nmodest beams, the beamwidth is wider than the inaccuracy in the rotator. My design simply used the 1 RPM rotatino of the motor to keep track of position and after each pass, or on edmand, it woiuld drive CW (or CCW) into the stops, zero the counter and then consider that zero and count from there. Tilt the beams up modestly to 15 degrees and you have plenty of gain. When the LEO satellite is above that it is 6 to 10 dB closer and plenty strong enough. And when it is below 15 degrees it is far away on the horizon and still totally within the main beam of the modest beam.
Low tech, but I'm NOT taking down my AO-10 class antennas just so I can use a low tech rotor controller.. Very happy with my FoxDelta ST2. Now to get the radio working and actually get back on the birds...
-- 73 ------------------------------------- Jim Walls - K6CCC jim@k6ccc.org Ofc: 818-548-4804 http://members.dslextreme.com/users/k6ccc/ AMSAT Member 32537 - WSWSS Member 395
-----------------------------------------------------------
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!
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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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!
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. Not an AMSAT-NA member? Join now to support the amateur satellite program!
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
participants (3)
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Gary -
Ray Soifer -
z man