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Today's Topics:
1. Unable to even call cq on CAS-6 (Lapo Pieri)
2. Re: Unable to even call cq on CAS-6 (Scott)
3. Re: GeoSat OSCAR-2024 Positive comments, no, whining....(Was
need HEO..please..) (Jean Marc Momple)
4. Re: GeoSat OSCAR-2024 Positive comments, no, whining....(Was
need HEO..please..) (Matthias Bopp)
5. Re: Unable to even call cq on CAS-6 (Lapo Pieri)
6. Satellite Users on Macs (Bill Howell)
7. Re: Satellites with 2.4GHz (13cm) (Zach Metzinger)
8. Re: Satellites with 2.4GHz (13cm) (Pete vk2pet)
----------------------------------------------------------------------
Message: 1
Date: Sun, 21 Jun 2020 22:53:41 +0200
From: Lapo Pieri <ik5nax@???????????.??>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] Unable to even call cq on CAS-6
Message-ID: <20200621205341.GA7474@??????>
Content-Type: text/plain; charset=us-ascii
Hi,
during last pass over Europe of CAS-6 (2020-06-21 ~20:30Z) I've
experienced the problem already reported here few days ago: even
with 10-15W EIRP after a couple of seconds in TX trasponder cut off my
signal. I'm quite sure to be not over beacon level. The beacon appares
unmodulated.
Heard few station calling but get only part of callsign for the same
problem.
73, Lapo IK5NAX
------------------------------
Message: 2
Date: Sun, 21 Jun 2020 17:23:31 -0400
From: Scott <scott23192@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unable to even call cq on CAS-6
Message-ID:
<CAJCSnOZ44RsW=yR9UFK__CL-JOcUgoUpRhAC8bbv9NnfsYq+BA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Here is a screen shot of my RX waterfall showing the pattern of CAS-6's
downlink... it's a challenge to say the least, but at least if you know the
pattern it's possible to TX at just the right time.
https://twitter.com/scott23192/status/1274537862843826176
... I have to confess that if this pattern of extremely brief operational
windows continues, I'm going to be awfully tempted to see if anyone would
like to try some satellite MSK144. But I know it's early and hopefully the
situation will improve for voice comms.
-Scott, K4KDR
==================
On Sun, Jun 21, 2020 at 5:12 PM Lapo Pieri via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Hi,
> during last pass over Europe of CAS-6 (2020-06-21 ~20:30Z) I've
> experienced the problem already reported here few days ago: even
> with 10-15W EIRP after a couple of seconds in TX trasponder cut off my
> signal. I'm quite sure to be not over beacon level. The beacon appares
> unmodulated.
> Heard few station calling but get only part of callsign for the same
> problem.
>
> 73, Lapo IK5NAX
>
------------------------------
Message: 3
Date: Mon, 22 Jun 2020 20:43:12 +0400
From: Jean Marc Momple <jean.marc.momple@?????.???>
To: Matthias Bopp <matthias.bopp@?????.??>
Cc: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
whining....(Was need HEO..please..)
Message-ID: <C10F245F-0E4C-4699-B561-68BA3B548343@?????.???>
Content-Type: text/plain; charset=utf-8
Mathias,
Yes, the Minitiouner is really great for ATV, unfortunately mine is kaput
due to an accidental short circuit cause by my dog (hi!) and therefore less
active on ATV these days. I need to order another one but waiting for
commercial opening of the airways to Europe.
I prefer the Lime as the Pluto drift is annoying (but manageable), anyway my
Pluto also kaput due to same incident stated above so using the Lime.
All these relatively cheap hardware and a computer makes it so easy and open
such great experiments. As a matter of fact with a RTL SDR costing only
US$24 I uploaded more than a million of Telemetry frames to various
organisations such as Satnogs, Funcube, AMSAT (Foxtelem), Universities, even
to Harbin for the Lunar bird, etc.
Also to share, made many experiment with LNB?s for QO-100, modified quite a
few LNB?s, tested many from the most expensive such as the Bullseye,
Octagon, to the cheapest Chinese PLL (at US$ 3), all work fine on QO-100
with SDR Console (thanks to Simon Brown G4ELI) particularly with the GEO sync.
73
Jean Marc (3B8DU)
> On Jun 21, 2020, at 7:58 PM, Matthias Bopp <matthias.bopp@?????.??> wrote:
>
> Hi Jean-Marc,
>
> Very good point.
>
> Actually if you use a Pluto you can use it also with a software based free
solution to receive the WB Transponder without additional cost.
>
> To receive the WB Transponder I prefer the Minitiouner kits from REF or
BATC for about 100 Euros which is still a very cost effective solution.
>
> Kind regards
>
> Matthias
>
> www.dd1us.de
>
>
> Originalnachricht
> Von: Jean Marc Momple
> Gesendet: Sonntag, 21. Juni 2020 17:38
> An: Matthias Bopp
> Cc: amsat-bb@?????.???
> Betreff: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
whining....(Was need HEO..please..)
>
>
> Dear All,
>
> Forgot to say a major positive about QO-100 which is the cost of setting
up a Ground Station for narrow the band transponder, assuming that the PC is
already available and that one use a Tx/Rx such as the Pluto or Lime SDR,s a
few Chinese WiFi booster, a PLL LNB and a 80cm dish, the total cost is less
than US$ 400.
>
> This is really attractive to students and for all Ham?s with modest means
compared with buying any commercially available transceiver (or may be 2
actually) for satellite operations, thus cost of entry in QO-100 is really
affordable to newbies, more these guys may immediately jump in real Dx QSO?s
and learn the trade, this surely motivate them for further experimentation.
Particularly in remote Islands like us in that part of the globe.
>
> My 1 cent additional input to the subject.
>
> 73
>
>
> Jean Marc (3B8DU)
>
>> On Jun 20, 2020, at 6:50 PM, Jean Marc Momple
<jean.marc.momple@?????.???> wrote:
>>
>> Mattias,
>>
>> Thanks for having corrected the matter which may have created wrong
perceptions.
>>
>> Thanks to AMSAT DL, QARS and the sponsors who made such a great Radio
Amateur bird possible, again congratulations for that.
>>
>> That said I wish to confirm/comment your last paragraph, as follows:
>>
>> In the Indian Ocean FR (mainly Reunion Island and 3B* Mauritius) we are
only a few Hams. With HF not going through these days the hobby was somehow
left on the side by some and QO-100 has really revived the activities.
>>
>> To share my personal case I was able to experiment microwave (2.4/10GHz)
and modes such as ATV for the first time in my Ham life (licensed since
1977) as there was no-one around to be able to contact on these bands and
modes. Now building a 3m dish experiment different types of feeds etc..
(some other local guys also and even students).
>>
>> In a nutshell a new world (or at least a half one) made available to us,
many experimentations and learnings. I feel like again being 16 (age when I
got my licence) as building antennas again, feeds, assembly of various
components to build the QO-100 station.
>>
>> I just hope the ones not in coverage presently will get a in a Ham GEO
coverage soon and hopefully will fully understand what it means really.
>>
>> 73
>>
>>
>>
>> Jean Marc (3B8DU)
>>
>>
>>
>>> On Jun 20, 2020, at 12:29 PM, Matthias Bopp via AMSAT-BB
<amsat-bb@?????.???> wrote:
>>>
>>> Paul,
>>>
>>> With all due respect. I already tried to explain to you less than 48
hours ago: this is not just a simple retuned hardware on QO-100
>>>
>>> You stated "It?s important to note that QO-100 is not an amateur payload
at all."
>>> The payload was specified by AMSAT and during the design AMSAT did
participate in all critical design reviews. AMSAT indeed first intended to
build the transponders themselves.
>>> The owner of the satellite did trust the technical knowhow of AMSAT
but for safety and insurance reasons the hardware was built by a
professional company.
>>> Of course, QO-100 was coordinated via IARU and fully qualifies as an
amateur satellite (payload). Therefore, it got the number 100 (from AMSAT-NA).
>>>
>>> You stated "The two transponders in amateur use are on-orbit commercial
spares modified to tune to amateur frequencies."
>>> Let me explain it in simple words so you understand: you cannot
simply retune a WCDMA cellphone and use it as a 2m FM handheld transceiver
>>> The hardware in commercial satellite transponders is not meant to be
a linear transponder with an AGC etc.
>>> In addition, there are no 2.4GHz/10GHz transponders on commercial
satellites.
>>> Thus, the hardware had to be custom built for QO-100. The same is
true for the uplink and downlink antennas. The only parts which are reused
are the TWT PAs.
>>>
>>> So please, if you need help to understand the architecture or the
published block diagram of the amateur payload please contact the
responsible people of AMSAT-DL and they will be happy to help you.
>>> But please stop commenting about a satellite you have apparently no clue
about or you do not understand the underlying technology.
>>>
>>> In any case, meanwhile there more than 1000 happy users in more than 100
countries who are enjoying QO-100 using many different operating modes.
>>> QO-100 has stimulated a lot of technical activities in the microwave
bands and a lot of radio amateurs, who never used the microwave bands,
learned how to build and operate a station with 13cm uplink and 10 GHz
downlink.
>>>
>>> Kind regards
>>>
>>> Matthias
>>>
>>> www.dd1us.de
>>>
>>> -----Urspr?ngliche Nachricht-----
>>> Von: AMSAT-BB <amsat-bb-bounces@?????.???> Im Auftrag von Paul Stoetzer
via AMSAT-BB
>>> Gesendet: Samstag, 20. Juni 2020 06:21
>>> An: Joe Leikhim <rhyolite@???????.???>
>>> Cc: amsat-bb@?????.???
>>> Betreff: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
whining....(Was need HEO..please..)
>>>
>>> Joe,
>>>
>>> It?s important to note that QO-100 is not an amateur payload at all. The
two transponders in amateur use are on-orbit commercial spares modified to
tune to amateur frequencies. And, of course, there?s the risk that the
spares may be needed for commercial service some day.
>>>
>>> The issue is that to get an American company to do this, you need
millions of dollars up front and then probably millions of dollars a year to
support it. It?s been looked into multiple times over the years and no one
is willing to just give that away or even quote a price that?s remotely
reasonable.
>>>
>>> I do take issue with your choice of words in describing GOLF-TEE as
?baby steps.? GOLF is a project that AMSAT has committed a large amount of
money and man-hours to. It is a very significant project and will lead us
back to HEO. Our engineering team is doing tremendous work and deserves the
full support and encouragement of the amateur community. Sadly, I feel that
support is often lacking and, frankly, our volunteers deserve better than
that.
>>>
>>> If you want a HEO, support AMSAT and GOLF in any way that you can. AMSAT
is 100% committed and I am personally 100% committed to making this happen
for the community.
>>>
>>> 73,
>>>
>>> Paul Stoetzer, N8HM
>>> Executive Vice President
>>> AMSAT
>>>
>>> On Sat, Jun 20, 2020 at 00:01 Joe Leikhim via AMSAT-BB
<amsat-bb@?????.???>
>>> wrote:
>>>
>>>> Robert;
>>>>
>>>> AMSAT has been in HEO before and can get there again.
>>>>
>>>> The idea of my proposal is to piggy back on a willing commercial
>>>> satellite. The owner of that satellite would be handling the necessary
>>>> regulatory issues/problems. This idea has been proposed before but
>>>> convincing a commercial satellite owner to attach unproven payload has
>>>> always been an negative argument. No longer, because OSCAR-100 is
>>>> proven hardware and it should be considered.
>>>>
>>>> Meanwhile GOLF-TEE can continue to take baby steps.
>>>>
>>>> Looking for ideas to promote this idea. Be positive.
>>>>
>>>>
>>>> --
>>>> Joe Leikhim
>>>>
>>>>
>>>> Leikhim and Associates
>>>>
>>>> Communications Consultants
>>>>
>>>> Oviedo, Florida
>>>>
>>>> JLeikhim@???????.???
>>>>
>>>> 407-982-0446
>>>>
>>>> WWW.LEIKHIM.COM
>>>>
>>>> _______________________________________________
>>>> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
------------------------------
Message: 4
Date: Mon, 22 Jun 2020 17:15:31 +0000
From: Matthias Bopp <matthias.bopp@?????.??>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
whining....(Was need HEO..please..)
Message-ID:
<LEXPR01MB04935CFE70B944B6DBF08FEEDE970@?????????????.????????.????.???????.??
>
Content-Type: text/plain; charset="utf-8"
Hi Jean Marc,
It is a pity that your Minitiouner and Pluto are damaged. I hope you can
possibly repair one or the other ...
Actually, I prefer the Lime-USB for narrowband operations on QO-100.
I modified the Pluto for external reference and thus it is also stable. Yet
I use it mostly for DATV-TX.
I agree that SDR-Console is a great tool for operations via QO-100 and the
majority of the QO-100 operators are meanwhile using it.
Simon has spent a lot of work on getting the Lime-SDR and Pluto-SDR working
fine including locking the RX chain to the PSK beacon.
I remember in the "hot phase" of his development which lasted about 3 months
several Beta-Testers including myself spent many
hours in testing the various beta-versions from Simon.
I am looking forward to talk to you again on QO-100-
Kind regards
Matthias
www.dd1us.de
-----Urspr?ngliche Nachricht-----
Von: Jean Marc Momple <jean.marc.momple@?????.???>
Gesendet: Montag, 22. Juni 2020 18:43
An: Matthias Bopp <matthias.bopp@?????.??>
Cc: amsat-bb@?????.???
Betreff: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
whining....(Was need HEO..please..)
Mathias,
Yes, the Minitiouner is really great for ATV, unfortunately mine is kaput
due to an accidental short circuit cause by my dog (hi!) and therefore less
active on ATV these days. I need to order another one but waiting for
commercial opening of the airways to Europe.
I prefer the Lime as the Pluto drift is annoying (but manageable), anyway my
Pluto also kaput due to same incident stated above so using the Lime.
All these relatively cheap hardware and a computer makes it so easy and open
such great experiments. As a matter of fact with a RTL SDR costing only
US$24 I uploaded more than a million of Telemetry frames to various
organisations such as Satnogs, Funcube, AMSAT (Foxtelem), Universities, even
to Harbin for the Lunar bird, etc.
Also to share, made many experiment with LNB?s for QO-100, modified quite a
few LNB?s, tested many from the most expensive such as the Bullseye,
Octagon, to the cheapest Chinese PLL (at US$ 3), all work fine on QO-100
with SDR Console (thanks to Simon Brown G4ELI) particularly with the GEO sync.
73
Jean Marc (3B8DU)
> On Jun 21, 2020, at 7:58 PM, Matthias Bopp <matthias.bopp@?????.??> wrote:
>
> Hi Jean-Marc,
>
> Very good point.
>
> Actually if you use a Pluto you can use it also with a software based free
solution to receive the WB Transponder without additional cost.
>
> To receive the WB Transponder I prefer the Minitiouner kits from REF or
BATC for about 100 Euros which is still a very cost effective solution.
>
> Kind regards
>
> Matthias
>
> www.dd1us.de
>
>
> Originalnachricht
> Von: Jean Marc Momple
> Gesendet: Sonntag, 21. Juni 2020 17:38
> An: Matthias Bopp
> Cc: amsat-bb@?????.???
> Betreff: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
> whining....(Was need HEO..please..)
>
>
> Dear All,
>
> Forgot to say a major positive about QO-100 which is the cost of setting
up a Ground Station for narrow the band transponder, assuming that the PC is
already available and that one use a Tx/Rx such as the Pluto or Lime SDR,s a
few Chinese WiFi booster, a PLL LNB and a 80cm dish, the total cost is less
than US$ 400.
>
> This is really attractive to students and for all Ham?s with modest means
compared with buying any commercially available transceiver (or may be 2
actually) for satellite operations, thus cost of entry in QO-100 is really
affordable to newbies, more these guys may immediately jump in real Dx QSO?s
and learn the trade, this surely motivate them for further experimentation.
Particularly in remote Islands like us in that part of the globe.
>
> My 1 cent additional input to the subject.
>
> 73
>
>
> Jean Marc (3B8DU)
>
>> On Jun 20, 2020, at 6:50 PM, Jean Marc Momple
<jean.marc.momple@?????.???> wrote:
>>
>> Mattias,
>>
>> Thanks for having corrected the matter which may have created wrong
perceptions.
>>
>> Thanks to AMSAT DL, QARS and the sponsors who made such a great Radio
Amateur bird possible, again congratulations for that.
>>
>> That said I wish to confirm/comment your last paragraph, as follows:
>>
>> In the Indian Ocean FR (mainly Reunion Island and 3B* Mauritius) we are
only a few Hams. With HF not going through these days the hobby was somehow
left on the side by some and QO-100 has really revived the activities.
>>
>> To share my personal case I was able to experiment microwave (2.4/10GHz)
and modes such as ATV for the first time in my Ham life (licensed since
1977) as there was no-one around to be able to contact on these bands and
modes. Now building a 3m dish experiment different types of feeds etc..
(some other local guys also and even students).
>>
>> In a nutshell a new world (or at least a half one) made available to us,
many experimentations and learnings. I feel like again being 16 (age when I
got my licence) as building antennas again, feeds, assembly of various
components to build the QO-100 station.
>>
>> I just hope the ones not in coverage presently will get a in a Ham GEO
coverage soon and hopefully will fully understand what it means really.
>>
>> 73
>>
>>
>>
>> Jean Marc (3B8DU)
>>
>>
>>
>>> On Jun 20, 2020, at 12:29 PM, Matthias Bopp via AMSAT-BB
<amsat-bb@?????.???> wrote:
>>>
>>> Paul,
>>>
>>> With all due respect. I already tried to explain to you less than 48
>>> hours ago: this is not just a simple retuned hardware on QO-100
>>>
>>> You stated "It?s important to note that QO-100 is not an amateur payload
at all."
>>> The payload was specified by AMSAT and during the design AMSAT did
participate in all critical design reviews. AMSAT indeed first intended to
build the transponders themselves.
>>> The owner of the satellite did trust the technical knowhow of AMSAT
but for safety and insurance reasons the hardware was built by a
professional company.
>>> Of course, QO-100 was coordinated via IARU and fully qualifies as an
amateur satellite (payload). Therefore, it got the number 100 (from AMSAT-NA).
>>>
>>> You stated "The two transponders in amateur use are on-orbit commercial
spares modified to tune to amateur frequencies."
>>> Let me explain it in simple words so you understand: you cannot
simply retune a WCDMA cellphone and use it as a 2m FM handheld transceiver
>>> The hardware in commercial satellite transponders is not meant to be
a linear transponder with an AGC etc.
>>> In addition, there are no 2.4GHz/10GHz transponders on commercial
satellites.
>>> Thus, the hardware had to be custom built for QO-100. The same is
true for the uplink and downlink antennas. The only parts which are reused
are the TWT PAs.
>>>
>>> So please, if you need help to understand the architecture or the
published block diagram of the amateur payload please contact the
responsible people of AMSAT-DL and they will be happy to help you.
>>> But please stop commenting about a satellite you have apparently no clue
about or you do not understand the underlying technology.
>>>
>>> In any case, meanwhile there more than 1000 happy users in more than 100
countries who are enjoying QO-100 using many different operating modes.
>>> QO-100 has stimulated a lot of technical activities in the microwave
bands and a lot of radio amateurs, who never used the microwave bands,
learned how to build and operate a station with 13cm uplink and 10 GHz
downlink.
>>>
>>> Kind regards
>>>
>>> Matthias
>>>
>>> www.dd1us.de
>>>
>>> -----Urspr?ngliche Nachricht-----
>>> Von: AMSAT-BB <amsat-bb-bounces@?????.???> Im Auftrag von Paul
>>> Stoetzer via AMSAT-BB
>>> Gesendet: Samstag, 20. Juni 2020 06:21
>>> An: Joe Leikhim <rhyolite@???????.???>
>>> Cc: amsat-bb@?????.???
>>> Betreff: Re: [amsat-bb] GeoSat OSCAR-2024 Positive comments, no,
>>> whining....(Was need HEO..please..)
>>>
>>> Joe,
>>>
>>> It?s important to note that QO-100 is not an amateur payload at all. The
two transponders in amateur use are on-orbit commercial spares modified to
tune to amateur frequencies. And, of course, there?s the risk that the
spares may be needed for commercial service some day.
>>>
>>> The issue is that to get an American company to do this, you need
millions of dollars up front and then probably millions of dollars a year to
support it. It?s been looked into multiple times over the years and no one
is willing to just give that away or even quote a price that?s remotely
reasonable.
>>>
>>> I do take issue with your choice of words in describing GOLF-TEE as
?baby steps.? GOLF is a project that AMSAT has committed a large amount of
money and man-hours to. It is a very significant project and will lead us
back to HEO. Our engineering team is doing tremendous work and deserves the
full support and encouragement of the amateur community. Sadly, I feel that
support is often lacking and, frankly, our volunteers deserve better than
that.
>>>
>>> If you want a HEO, support AMSAT and GOLF in any way that you can. AMSAT
is 100% committed and I am personally 100% committed to making this happen
for the community.
>>>
>>> 73,
>>>
>>> Paul Stoetzer, N8HM
>>> Executive Vice President
>>> AMSAT
>>>
>>> On Sat, Jun 20, 2020 at 00:01 Joe Leikhim via AMSAT-BB
>>> <amsat-bb@?????.???>
>>> wrote:
>>>
>>>> Robert;
>>>>
>>>> AMSAT has been in HEO before and can get there again.
>>>>
>>>> The idea of my proposal is to piggy back on a willing commercial
>>>> satellite. The owner of that satellite would be handling the
>>>> necessary regulatory issues/problems. This idea has been proposed
>>>> before but convincing a commercial satellite owner to attach
>>>> unproven payload has always been an negative argument. No longer,
>>>> because OSCAR-100 is proven hardware and it should be considered.
>>>>
>>>> Meanwhile GOLF-TEE can continue to take baby steps.
>>>>
>>>> Looking for ideas to promote this idea. Be positive.
>>>>
>>>>
>>>> --
>>>> Joe Leikhim
>>>>
>>>>
>>>> Leikhim and Associates
>>>>
>>>> Communications Consultants
>>>>
>>>> Oviedo, Florida
>>>>
>>>> JLeikhim@???????.???
>>>>
>>>> 407-982-0446
>>>>
>>>> WWW.LEIKHIM.COM
>>>>
>>>> _______________________________________________
>>>> Sent via AMSAT-BB@?????.???. 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:
>>>> https://www.amsat.org/mailman/listinfo/amsat-bb
>>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. 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:
>>> https://www.amsat.org/mailman/listinfo/amsat-bb
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. 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:
>>> https://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
------------------------------
Message: 5
Date: Mon, 22 Jun 2020 22:49:06 +0200
From: Lapo Pieri <ik5nax@???????????.??>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Unable to even call cq on CAS-6
Message-ID: <20200622204906.GB1388@??????>
Content-Type: text/plain; charset=us-ascii
Hi,
17:23 Sun 21 Jun 20 , Scott via AMSAT-BB wrote:
> Here is a screen shot of my RX waterfall showing the pattern of CAS-6's
> downlink... it's a challenge to say the least, but at least if you know the
> pattern it's possible to TX at just the right time.
>
> https://twitter.com/scott23192/status/1274537862843826176
Hmmm... very difficult to use.
But is it due to excess of our tx power or is just a mulfunction?
> ... I have to confess that if this pattern of extremely brief operational
> windows continues, I'm going to be awfully tempted to see if anyone would
> like to try some satellite MSK144.
Really I don't figure out HOW dopller matter for MSK144
Lapo, IK5NAX
------------------------------
Message: 6
Date: Mon, 22 Jun 2020 18:35:25 -0500
From: Bill Howell <mrbillmac@???.???>
To: Amsat List <amsat-bb@?????.???>
Subject: [amsat-bb] Satellite Users on Macs
Message-ID: <15928B56-FB21-47E2-80C4-FE89B0816518@???.???>
Content-Type: text/plain; charset=utf-8
I?ve been using MacDoppler for quite a few years.
Right now, it?s running on a 9 year old iMac. I also have MacDoppler running
on an older (pre Intel)
Mac PowerBook G4.
I?m only using the program to control the 5400 rotor.
I?ve found the program easy to use...
update keps using the apps? pull-down menu, select a satellite, and operate.
Bill N5ALO
------------------------------
Message: 7
Date: Mon, 22 Jun 2020 22:35:29 -0500
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Satellites with 2.4GHz (13cm)
Message-ID: <ddc948e1-e633-9c2e-b84e-968b4715f8d5@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 05/21/20 19:45, Paul Stoetzer via AMSAT-BB wrote:
> DTUSAT-2 at 2401.850 MHz.
>
> Usually a CW beacon.
On Thu, May 21, 2020 at 20:43 Pete vk2pet via AMSAT-BB
<amsat-bb@?????.???> wrote:
> Does anyone know of known good satellites with either telemetry or
> beacon between 2.400GHZ & 2450GHZ?
(subject line slightly altered to include more search keywords)
Over the years of amsat-bb, the topic to 13cm operation has come up
several times.
Out of curiosity, what does the noise floor look like when pointed at
the sky? Is 2.4 GHz a good band for satellite downlinks, or is it
impossible to get away from the 802.11 wlan traffic in an urban setting?
--- Zach
N0ZGO
------------------------------
Message: 8
Date: Tue, 23 Jun 2020 15:33:12 +1000
From: Pete vk2pet <vk2pet@?????????.??.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Satellites with 2.4GHz (13cm)
Message-ID: <5764cb43-617a-9b86-215f-9fa272f5b4dc@?????????.??.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Zach,
Unfortunatly DTUSAT-2 didn't work for me.
The noise floor is quite high & you are correctin the 802.11 wlan
traffic, it smashes the 2.4ghz signal.
Lucky where I do the sat work as it's in the country areas of New South
Wales in Aust, even being isolated this still picks up the 802.11 wlan
traffic. You will need to turn off all computers/phones & anything with
WIFI in it if you are the receiver.
There are only a couple private satellites that have the ITU coordinated
filing for S band.
73
Pete
On 23/06/2020 1:35 pm, Zach Metzinger via AMSAT-BB wrote:
> On 05/21/20 19:45, Paul Stoetzer via AMSAT-BB wrote:
>> DTUSAT-2 at 2401.850 MHz.
>>
>> Usually a CW beacon.
>
> On Thu, May 21, 2020 at 20:43 Pete vk2pet via AMSAT-BB
> <amsat-bb@?????.???> wrote:
>> Does anyone know of known good satellites with either telemetry or
>> beacon between 2.400GHZ & 2450GHZ?
>
> (subject line slightly altered to include more search keywords)
>
> Over the years of amsat-bb, the topic to 13cm operation has come up
> several times.
>
> Out of curiosity, what does the noise floor look like when pointed at
> the sky? Is 2.4 GHz a good band for satellite downlinks, or is it
> impossible to get away from the 802.11 wlan traffic in an urban setting?
>
> --- Zach
> N0ZGO
>
> _______________________________________________
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> to all interested persons worldwide without requiring membership.
> Opinions expressed
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> of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
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 member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 211
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