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CX2SA > SATDIG 03.07.09 01:26l 872 Lines 26825 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: The Moon is our Future (David - KG4ZLB)
2. Re: The Moon is our Future (James French)
3. I: How you do DOPPLER correction in Linear Transponders?
(Francesco Grappi)
4. Re: The Moon is our Future (Joe)
5. Re: How you do DOPPLER correction in Linear Transponders?
(Andrew Glasbrenner)
6. Re: The Moon is our Future (Joe)
7. Re: The Moon is our Future (Nigel Gunn G8IFF/W8IFF)
8. Re: The Moon is our Future (Armando Mercado)
9. The Moon is our Future (MM)
10. Re: The Moon is our Future (Nigel Gunn G8IFF/W8IFF)
11. Re: How you do DOPPLER correction in Linear Transponders?
(n3tl@xxxxxxxxx.xxxx
12. AMSAT Journal (Ed Long)
13. Re: How you do DOPPLER correction in Linear Transponders?
(Alan P. Biddle)
14. Re: How you do DOPPLER correction in Linear Transponders?
(Gould Smith)
15. Richard Garriott qsl (Perry Yantis)
----------------------------------------------------------------------
Message: 1
Date: Thu, 02 Jul 2009 12:28:45 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: amsat-bb@xxxxx.xxx
Message-ID: <4A4CE03D.10905@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
OK, I just love conspiracy theories :-D
Are you really Michael Moore ?
:-D
kd8bxp@xxx.xxx wrote:
> I don't think man will ever walk on the moon. And I really didn't want to
start a whole thing on this -
> Someone said that a man would have to roll out an antenna for a amatuer
project - I just don't think that will ever happen
> A small robotic rover could do it but then you are talking expensive unless
nasa was willing to give "us" time on a rover that was going to do experiments
for nasa
>
> LeRoy, KD8BXP
> http://www.HamOhio.com
>
------------------------------
Message: 2
Date: Thu, 02 Jul 2009 12:30:59 -0400
From: James French <w8iss@xxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <1246552259.10728.64.camel@xxxxxxxxx>
Content-Type: text/plain
On Thu, 2009-07-02 at 10:52 -0500, tosca005@xxx.xxx wrote:
> As far as the dreaming goes, wouldn't an L/S transponder be better than a
> V/U or U/V transponder? Granted, the path loss is greater, but the antenna
> gain is easier to produce...
Miles,
Why not use a L/s, U/L. or a U/s transponder for this?
Why limit ourselves to V/u for everything?
Aren't we supposed to 'experiment' with the higher frequencies we have
allocated?
Its in the AMSAT by-laws to support the higher frequencies.
>From the AMSAT-NA by-laws Section three, subsection E:
Encouraging the more effective and expanded use of the higher frequency
amateur radio frequency bands.
This would mean smaller antennas with MUCH better gain and beamwidth.
I vote in favor of at least a L/s transponder for this.
James W8ISS
------------------------------
Message: 3
Date: Thu, 2 Jul 2009 18:32:30 +0200
From: "Francesco Grappi" <f.grappi@xxx.xx>
Subject: [amsat-bb] I: How you do DOPPLER correction in Linear
Transponders?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <6A1BF9996A0543A0A9CD3FC5CC801E3C@xxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Fabiano,
In my opinion for sure keep fixed downlink frequency
and adjust uplink frequency.
So on this way you don't "slip" on the transponder
downlink.....
73
Frank IW4DVZ
-----Messaggio originale-----
Da: amsat-bb-bounces@xxxxx.xxx
[mailto:amsat-bb-bounces@xxxxx.xxxx Per conto di
Fabiano Moser
Inviato: gioved? 2 luglio 2009 18.20
A: amsat-bb
Oggetto: [amsat-bb] How you do DOPPLER correction in
Linear Transponders?
Dear friends,
We know that some Satellite Operators use diferent
system to doppler control.
For Linear Transponder
1) Adjust uplink and downlink automatic by CAT? (Not
always woks, some times I?m up or down from the
computer adjust)
2) Adjust uplink and downlink manual
3) Keep Uplink fixed and adjust only the Downlink
frequency.
What is the more indicate method to use?
FT-847 have knob to adjust Uplink without change
downlink VFO, and I?m using it to keep my voice in
downlink at same downlink much I can.
But I know some operators use fixed uplink.
How you do?
--
73
Fabiano Moser CR7/PY5RX
ARISS-PORTUGAL (Amateur Radio on the International
Space Station) Representative at Teleconference and
Portugal Telebridge Coordinator. AMRAD/AMSAT-CT
http://www.amrad.pt/ariss.php
"There is no great talent without great will. (Honor?
de Balzac)"
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are
those of the author. Not an AMSAT-NA member? Join now
to support the amateur satellite program! Subscription
settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Thu, 02 Jul 2009 11:32:28 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: kg4zlb@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A4CE11C.1080004@xxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
he he he,
He just missed his ride with the comet Hale Bop, and the heavens gate folk
Joe WB9SBD
David - KG4ZLB wrote:
>OK, I just love conspiracy theories :-D
>
>Are you really Michael Moore ?
>
>:-D
>
>
>
>
>kd8bxp@xxx.xxx wrote:
>
>
>>I don't think man will ever walk on the moon. And I really didn't want to
start a whole thing on this -
>>Someone said that a man would have to roll out an antenna for a amatuer
project - I just don't think that will ever happen
>>A small robotic rover could do it but then you are talking expensive unless
nasa was willing to give "us" time on a rover that was going to do experiments
for nasa
>>
>>LeRoy, KD8BXP
>>http://www.HamOhio.com
>>
>>
>>
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>------------------------------------------------------------------------
>
>
>No virus found in this incoming message.
>Checked by AVG - www.avg.com
>Version: 8.5.375 / Virus Database: 270.13.2/2214 - Release Date: 07/02/09
05:54:00
>
>
>
------------------------------
Message: 5
Date: Thu, 2 Jul 2009 12:36:12 -0400
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: How you do DOPPLER correction in Linear
Transponders?
To: "Fabiano Moser" <fabianomoser@xxxxx.xxx>, "amsat-bb"
<AMSAT-BB@xxxxx.xxx>
Message-ID: <09D7C71D39F24BC28C5683061950C9FC@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
http://www.amsat.org/amsat/features/one_true_rule.html
If you can't do CAT, adjust the higher of the two frequencies used.
73, Drew KO4MA
----- Original Message -----
From: "Fabiano Moser" <fabianomoser@xxxxx.xxx>
To: "amsat-bb" <AMSAT-BB@xxxxx.xxx>
Sent: Thursday, July 02, 2009 12:19 PM
Subject: [amsat-bb] How you do DOPPLER correction in Linear Transponders?
Dear friends,
We know that some Satellite Operators use diferent system to doppler
control.
For Linear Transponder
1) Adjust uplink and downlink automatic by CAT? (Not always woks, some times
I?m up or down from the computer adjust)
2) Adjust uplink and downlink manual
3) Keep Uplink fixed and adjust only the Downlink frequency.
What is the more indicate method to use?
FT-847 have knob to adjust Uplink without change downlink VFO, and I?m using
it to keep my voice in downlink at same downlink much I can.
But I know some operators use fixed uplink.
How you do?
--
73
Fabiano Moser CR7/PY5RX
ARISS-PORTUGAL (Amateur Radio on the International Space Station)
Representative at Teleconference and Portugal Telebridge Coordinator.
AMRAD/AMSAT-CT
http://www.amrad.pt/ariss.php
"There is no great talent without great will. (Honor? de Balzac)"
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Thu, 02 Jul 2009 11:41:00 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: James French <w8iss@xxxxxxxxxxxx.xxx>
Cc: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <4A4CE31C.1090609@xxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
Maybe some converted Wild Blue dishes?
They have a 1 watt tranny that operates at 29.5 to 30 GHz, may be able
to drag down to 24 Ghz?
I wonder what the ERP of a 1 watt sig at 30 GHz is with say a old TVRO
dish? Not the tiny mini dishes but a used say 10 footer hmmmmm,,,
Joe WB9SBD
James French wrote:
>On Thu, 2009-07-02 at 10:52 -0500, tosca005@xxx.xxx wrote:
>
>
>>As far as the dreaming goes, wouldn't an L/S transponder be better than a
>>V/U or U/V transponder? Granted, the path loss is greater, but the antenna
>>gain is easier to produce...
>>
>>
>
>Miles,
>
>Why not use a L/s, U/L. or a U/s transponder for this?
>Why limit ourselves to V/u for everything?
>Aren't we supposed to 'experiment' with the higher frequencies we have
>allocated?
>
>Its in the AMSAT by-laws to support the higher frequencies.
>>From the AMSAT-NA by-laws Section three, subsection E:
>Encouraging the more effective and expanded use of the higher frequency
>amateur radio frequency bands.
>
>This would mean smaller antennas with MUCH better gain and beamwidth.
>
>I vote in favor of at least a L/s transponder for this.
>
>James W8ISS
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>------------------------------------------------------------------------
>
>
>No virus found in this incoming message.
>Checked by AVG - www.avg.com
>Version: 8.5.375 / Virus Database: 270.13.2/2214 - Release Date: 07/02/09
05:54:00
>
>
>
------------------------------
Message: 7
Date: Thu, 02 Jul 2009 16:57:13 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: James French <w8iss@xxxxxxxxxxxx.xxx>
Cc: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <4A4CE6E9.2070104@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Most of us only have V/U and HF.
I vote for mode A.
James French wrote:
>
> Why not use a L/s, U/L. or a U/s transponder for this?
> Why limit ourselves to V/u for everything?
------------------------------
Message: 8
Date: Thu, 2 Jul 2009 13:02:05 -0400
From: "Armando Mercado" <am25544@xxxxxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: <amsat-bb@xxxxx.xxx>
Message-ID: <6E960C697B3B4849BDAEB222D7E80EE5@xxxxx>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
reply-type=original
Greetings,
Not to be a wet blanket, but what is the
advantage of an amateur repeater on the moon?
>From a mid-latitude location, the moon is above
the horizon 8.5 to 16 hours per day depending on
the season. The repeater would be in darkness
and presumably un-powered for 2 weeks each
month. Even if it was located in a permently
illuminated point near the poles, librations would
take it out of view of earth at times.
Link margins would be large, but not insurmountable.
Designing a comm package to survive the temperature
extremes would be difficult but not impossible. The
US and USSR had unmanned landers that survived
many lunar day night cycles.
We do have experience flying amateur repeaters on manned
space missions. There's one on the ISS right now.
It is turned off on a regular basis because of crew time
availability and flight safety rules. One can only imagine
what constraints would be imposed with a comm package
on the moon.
There would be many technical, logistical and financial
challenges for a lunar amateur repeater to overcome...and
all from an international organization that has yet to
replace AO-40.
73, Armando, N8IGJ
>Date: Thu, 2 Jul 2009 04:31:45 -0700 (PDT)
>From: MM <ka1rrw@xxxxx.xxx>
>Subject: [amsat-bb] The Moon is our Future
>To: kg4zlb@xxxxx.xxxx amsat-bb@xxxxx.xxxx "Jack K."
><kd1pe.1@xxxxx.xxx>
>Message-ID: <878811.97851.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
>Content-Type: text/plain; charset=utf-8
>Theoretically we may have a free ride to the Moon for an Amateur radio
>repeater!
------------------------------
Message: 9
Date: Thu, 2 Jul 2009 10:17:04 -0700 (PDT)
From: MM <ka1rrw@xxxxx.xxx>
Subject: [amsat-bb] The Moon is our Future
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>, James French
<w8iss@xxxxxxxxxxxx.xxx>
Message-ID: <514427.48195.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi James:
I am in favor of any band that has the desired results. I just used the 2/440
bands as the opener. Remember the higher in frequency the less affordable the
system becomes and the fewer Amateur Radio operators and Short Wave listeners
will have access to those frequencies. We do not want to design a system that
only 2 people can afford.
Goals:
Uplink to the Moon with an antenna system that would cost less than $1000 USD.
Receive from the Moon with an Antenna system that would cost less than $1000
USD.
An Off the Shelf transceiver system that cost less than $2000 USD.
With a properly designed repeater and properly selected Amateur Radio bands,
it should be possible to meet these goals. I have seen some project proposals
for ISS for example, that when reviewed it was discovered that no one could
afford the project (2 megabit fast TV, the link budget, Antenna, Receiver
requirement and precision rotor made the project only affordable by a
government).
If we are going to seriously think about a Moon repeater, we need to make sure
the Earth stations are practical and affordable.
It would also be helpful if we had more Amateur Radio band with ITU approved
Satellite segments. Anyone interested in going to the next WARC meeting to
petition for downlink access to 1.2 Gig and wider band access on 70cm.
Thanks Miles WF1F MarexMG.org
--- On Thu, 7/2/09, James French <w8iss@xxxxxxxxxxxx.xxx> wrote:
> From: James French <w8iss@xxxxxxxxxxxx.xxx>
> Subject: [amsat-bb] Re: The Moon is our Future
> To: "AMSAT-BB" <AMSAT-BB@xxxxx.xxx>
> Date: Thursday, July 2, 2009, 12:30 PM
> On Thu, 2009-07-02 at 10:52 -0500, tosca005@xxx.xxx
> wrote:
> > As far as the dreaming goes, wouldn't an L/S
> transponder be better than a
> > V/U or U/V transponder? Granted, the path loss is
> greater, but the antenna
> > gain is easier to produce...
>
> Miles,
>
> Why not use a L/s, U/L. or a U/s transponder for this?
> Why limit ourselves to V/u for everything?
> Aren't we supposed to 'experiment' with the higher
> frequencies we have
> allocated?
>
> Its in the AMSAT by-laws to support the higher
> frequencies.
> >From the AMSAT-NA by-laws Section three, subsection E:
> Encouraging the more effective and expanded use of the
> higher frequency
> amateur radio frequency bands.
>
> This would mean smaller antennas with MUCH better gain and
> beamwidth.
>
> I vote in favor of at least a L/s transponder for this.
>
> James W8ISS
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx.
> Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur
> satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 10
Date: Thu, 02 Jul 2009 17:23:08 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: The Moon is our Future
To: Armando Mercado <am25544@xxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A4CECFC.6070504@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
It would be the only repeater anywhere that I've seen that would get
sufficient use to justify it's existance.
Armando Mercado wrote:
> Not to be a wet blanket, but what is the
> advantage of an amateur repeater on the moon?
------------------------------
Message: 11
Date: Thu, 02 Jul 2009 17:29:41 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: How you do DOPPLER correction in Linear
Transponders?
To: Fabiano Moser <fabianomoser@xxxxx.xxx>, amsat-bb
<AMSAT-BB@xxxxx.xxx>
Message-ID:
<070220091729.12654.4A4CEE85000139DC0000316E22230647029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain; charset="utf-8"
The latest edition of "The ARRL Satellite Handbook" contradicts earlier
versions, which suggested the same approach that Drew has here (i.e., always
Doppler-tune the higher frequency) in favor of "parking" the uplink frequency
and Doppler-tuning the downlink (see the section "Finding Yourself ... and
Others," which begins on page 5-13 of the handbook). It occurs to me that, in
general, that is the worst approach to take - although I admit to only knowing
enough about all of this to be more dangerous than not.
Before I added computer-aided Doppler tuning to my station, I took Francesco's
approach and always tried to stay at the same downlink frequency, Doppler-
tuning the uplink regardless of whether it was the higher frequency. In
reality, my approach is only inconsistent with Drew's ONLY on FO-29 because,
on AO-7 (when in Mode B) and VO-52 (always in Mode B), the uplink IS the
higher frequency.
The reason I believe the 2008 edition of "The ARRL Satellite Handbook" offers
the worst approach has two elements:
1 - the "slipping" on the downlink that Francesco alludes to in his post, and
2 - the use of VO-52 as the "example satellite" for the description of how to
find one's signal. The exercise directs readers to Doppler-tune the lower of
the two frequencies to find themselves on the satellite.
Later today, I will try the "always tune the higher frequency" rule on FO-29,
which I admittedly have not every tried. I'm looking forward to learning how
that works for me since the higher frequency on that satelite is the downlink.
73 to all,
Tim - N3TL
-------------- Original message from Fabiano Moser <fabianomoser@xxxxx.xxx>: -
-------------
> Dear friends,
>
> We know that some Satellite Operators use diferent system to doppler
> control.
>
> For Linear Transponder
> 1) Adjust uplink and downlink automatic by CAT? (Not always woks, some times
> I?m up or down from the computer adjust)
> 2) Adjust uplink and downlink manual
> 3) Keep Uplink fixed and adjust only the Downlink frequency.
>
> What is the more indicate method to use?
> FT-847 have knob to adjust Uplink without change downlink VFO, and I?m using
> it to keep my voice in downlink at same downlink much I can.
>
> But I know some operators use fixed uplink.
>
> How you do?
>
> --
> 73
> Fabiano Moser CR7/PY5RX
> ARISS-PORTUGAL (Amateur Radio on the International Space Station)
> Representative at Teleconference and Portugal Telebridge Coordinator.
> AMRAD/AMSAT-CT
> http://www.amrad.pt/ariss.php
>
> "There is no great talent without great will. (Honor? de Balzac)"
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Thu, 2 Jul 2009 14:29:57 -0400
From: Ed Long <wa4swj@xxxxxxx.xxx>
Subject: [amsat-bb] AMSAT Journal
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <BAY107-W367B185174E1261E42BF66832F0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Everyone,
The May/June issue of The AMSAT Journal was just uploaded to the printer. This
one was a bit late too due to some content delays, but it is finished and I
think it's a great issue. Hope you enjoy it. The Editorial team worked hard on
it.
73 and have a very happy and safe July 4th (for those of you in the US),
Ed
Long
WA4SWJ
Editor, The AMSAT Journal
----
------------------------------
Message: 13
Date: Thu, 2 Jul 2009 13:35:19 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: How you do DOPPLER correction in Linear
Transponders?
To: "'Fabiano Moser'" <fabianomoser@xxxxx.xxx>, "'amsat-bb'"
<AMSAT-BB@xxxxx.xxx>
Message-ID: <FC4731DCF9694F95BE4F20ED5E36C872@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Fabiano,
You should if at all possible follow the One True Rule of Doppler tuning and
tune both. If you tune both the uplink and the downlink, and the person
with whom you are talking does the same, it makes the conversation much like
a terrestrial HF communications. I often have a QSO from AOS to LOS on AO-7
and FO-29 without once tuning the radio manually. Most modern tracking
programs, those written in the past 10 years, support this, and support the
FT-847.
http://www.amsat.org/amsat/features/one_true_rule.html
Alan
WA4SCA
------------------------------
Message: 14
Date: Thu, 2 Jul 2009 14:38:11 -0400
From: "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: How you do DOPPLER correction in Linear
Transponders?
To: <n3tl@xxxxxxxxx.xxx>, "Fabiano Moser" <fabianomoser@xxxxx.xxx>,
"amsat-bb" <AMSAT-BB@xxxxx.xxx>
Message-ID: <3CF8EEE4CAC444298B86F8ED4AF2BB5C@xxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
Tim, Fabiano and the BB,
This topic has been discussed for many decades.
Many approaches have valid logic, but there needs to be some recognized
standard or multiple approaches will be used.
Even with a standard, there are always new (and old) users that don't know
about it, and thus don't follow it OR do know and choose not to follow it.
AMSAT adopted the 'One True Rule' decades ago and still stands by it.
There is a copy of 'One True Rule' and a description in the AMSAT "Getting
Started Guide", and has been for years.
'One True Rule' needs a more visible link on the AMSAT web site, but that is
another issue.
So, the official AMSAT line is to follow 'One True Rule' .
73,
Gould, WA4SXM
AMSAT VP Operations
----- Original Message -----
From: <n3tl@xxxxxxxxx.xxx>
To: "Fabiano Moser" <fabianomoser@xxxxx.xxx>; "amsat-bb"
<AMSAT-BB@xxxxx.xxx>
Sent: Thursday, July 02, 2009 1:29 PM
Subject: [amsat-bb] Re: How you do DOPPLER correction in Linear
Transponders?
> The latest edition of "The ARRL Satellite Handbook" contradicts earlier
> versions, which suggested the same approach that Drew has here (i.e.,
> always Doppler-tune the higher frequency) in favor of "parking" the uplink
> frequency and Doppler-tuning the downlink (see the section "Finding
> Yourself ... and Others," which begins on page 5-13 of the handbook). It
> occurs to me that, in general, that is the worst approach to take -
> although I admit to only knowing enough about all of this to be more
> dangerous than not.
>
> Before I added computer-aided Doppler tuning to my station, I took
> Francesco's approach and always tried to stay at the same downlink
> frequency, Doppler-tuning the uplink regardless of whether it was the
> higher frequency. In reality, my approach is only inconsistent with Drew's
> ONLY on FO-29 because, on AO-7 (when in Mode B) and VO-52 (always in Mode
> B), the uplink IS the higher frequency.
>
> The reason I believe the 2008 edition of "The ARRL Satellite Handbook"
> offers the worst approach has two elements:
>
> 1 - the "slipping" on the downlink that Francesco alludes to in his post,
> and
>
> 2 - the use of VO-52 as the "example satellite" for the description of how
> to find one's signal. The exercise directs readers to Doppler-tune the
> lower of the two frequencies to find themselves on the satellite.
>
> Later today, I will try the "always tune the higher frequency" rule on
> FO-29, which I admittedly have not every tried. I'm looking forward to
> learning how that works for me since the higher frequency on that satelite
> is the downlink.
>
> 73 to all,
>
> Tim - N3TL
>
>
>
> -------------- Original message from Fabiano Moser
> <fabianomoser@xxxxx.xxx>: --------------
>
>
>> Dear friends,
>>
>> We know that some Satellite Operators use diferent system to doppler
>> control.
>>
>> For Linear Transponder
>> 1) Adjust uplink and downlink automatic by CAT? (Not always woks, some
>> times
>> I?m up or down from the computer adjust)
>> 2) Adjust uplink and downlink manual
>> 3) Keep Uplink fixed and adjust only the Downlink frequency.
>>
>> What is the more indicate method to use?
>> FT-847 have knob to adjust Uplink without change downlink VFO, and I?m
>> using
>> it to keep my voice in downlink at same downlink much I can.
>>
>> But I know some operators use fixed uplink.
>>
>> How you do?
>>
>> --
>> 73
>> Fabiano Moser CR7/PY5RX
>> ARISS-PORTUGAL (Amateur Radio on the International Space Station)
>> Representative at Teleconference and Portugal Telebridge Coordinator.
>> AMRAD/AMSAT-CT
>> http://www.amrad.pt/ariss.php
>>
>> "There is no great talent without great will. (Honor? de Balzac)"
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>
------------------------------
Message: 15
Date: Thu, 2 Jul 2009 14:44:25 -0400
From: Perry Yantis <py41@xxx.xxx>
Subject: [amsat-bb] Richard Garriott qsl
To: amsat-bb@xxxxx.xxx
Message-ID: <DFA18ED7-E321-4ACD-BBAF-D16BB8F7A7BB@xxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed
I received my qsl today from Richard Garriott.
Perry WB8OTH
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 4, Issue 308
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