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CX2SA > SATDIG 09.09.10 18:45l 932 Lines 28873 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Another Budget Launch Vehicle (Trevor .)
2. Suggestions For Full-duplex Radio? (B J)
3. thanks to K8YSE for so many grids!
(Patrick STODDARD (WD9EWK/VA7EWK))
4. Re: thanks to K8YSE for so many grids! (Rick - WA4NVM)
5. Re: Help needed for my FT-736 (Greg D.)
6. Re: Another Budget Launch Vehicle (Alexandru Csete)
7. Interesting article from the BBC (David - KG4ZLB)
8. Re: thanks to K8YSE for so many grids! (Zachary Beougher)
9. AO51 weak sig (wa4hfn@xxxxxxx.xxxx
10. Re: AO51 weak sig (Roger Kolakowski)
11. revision 1 - AO-51 schedule for September through early
October 2010 (Mark L. Hammond)
12. Re: AO51 weak sig (k8kfj@xxx.xxxx
13. Re: AO51 weak sig (Mark L. Hammond)
14. AO-51 mode V/S (Matt Patterson)
15. Re: AO-51 mode V/S (John Geiger)
16. Re: AO-51 mode V/S (Bob- W7LRD)
----------------------------------------------------------------------
Message: 1
Date: Wed, 8 Sep 2010 21:54:24 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] Re: Another Budget Launch Vehicle
To: amsat-bb@xxxxx.xxx
Message-ID: <667631.93972.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
It looks like it's still awaiting launch. The launch window closes Sep 17.
It's only going to an altitude of 30km, but lets hope it works and they can
move on to bigger rockets.
The organisation apparently relies on voluntary donations:
http://www.southgatearc.org/news/september2010/danish_rocket_launch.htm
73 Trevor M5AKA
--- On Sat, 4/9/10, Jeff Davis <jeff@xxxx.xxx> wrote:
> From: Jeff Davis <jeff@xxxx.xxx>
> Subject: [amsat-bb] Another Budget Launch Vehicle
> To: amsat-bb@xxxxx.xxx
> Date: Saturday, 4 September, 2010, 1:56
> >From Deutsche Welle News...
>
> Two Danish entrepreneurs are planning to launch a
> nine-meter high space
> rocket from a platform in the Baltic Sea on Saturday. They
> hope it will
> eventually pave the way for manned space flight in
> micro-sized
> spacecraft.
>
> http://goo.gl/Mw6z
>
> 73,
> --
> Jeff, KE9V
> _______________________________________________
> 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: 2
Date: Wed, 8 Sep 2010 17:39:45 -0700 (PDT)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb] Suggestions For Full-duplex Radio?
To: amsat-bb@xxxxx.xxx
Message-ID: <474702.88718.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I'm considering getting a full-duplex radio for working the linear birds.
Since the IC-910H's been discontinued, and I'm not sure if the IC-9100 would
be what I'm looking for, it appears the only one currently on the market is
the Kenwood TS-2000. I'm using a Yaesu FT-817ND for FM but I've had limited
success with it for SSB, which is why I'm looking at another radio.
Does anyone have any suggestions or comments? Thanks.
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 3
Date: Wed, 8 Sep 2010 18:50:22 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] thanks to K8YSE for so many grids!
To: amsat-bb@xxxxx.xxx
Message-ID: <427801.22522.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Now that John K8YSE is back home after a month or so on the
road, it's time to say THANK YOU!!!! Thanks for all the grids,
so many that may not have been on the air in many years - if
ever.
In looking through my log, preparing to send my QSL request to
K8YSE, I logged QSOs with K8YSE and K8YSE/VE3 in a total of 22
different grids. All but 2 of those are new grids for my
satellite log. If all of this matches up with John's log, this
will probably be the motivation to finally write out a satellite
VUCC application.
Whenever you settle down at home, John, I'm sure there would be
interest in hearing about your many thousands of miles motoring
around Lake Superior and those very remote places in northwestern
Ontario. Thanks again for all your work on the road!
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 4
Date: Wed, 8 Sep 2010 21:25:02 -0500
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: thanks to K8YSE for so many grids!
To: <amsat-bb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <55FC3A3AE7774230A56E78E73305F259@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hey John,
I'll second that! Five weeks ago yesterday...... what a camping trip.
Ohio wanted you back for a few months..... Florida is calling soon.
Thanks for all the new girds. We can't wait to see some pictures.
73,
Rick WA4NVM
> Hi!
>
> Now that John K8YSE is back home after a month or so on the
> road, it's time to say THANK YOU!!!! Thanks for all the grids,
> so many that may not have been on the air in many years - if
> ever.
>
> In looking through my log, preparing to send my QSL request to
> K8YSE, I logged QSOs with K8YSE and K8YSE/VE3 in a total of 22
> different grids. All but 2 of those are new grids for my
> satellite log. If all of this matches up with John's log, this
> will probably be the motivation to finally write out a satellite
> VUCC application.
>
> Whenever you settle down at home, John, I'm sure there would be
> interest in hearing about your many thousands of miles motoring
> around Lake Superior and those very remote places in northwestern
> Ontario. Thanks again for all your work on the road!
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
>
>
>
> _______________________________________________
> 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: 5
Date: Wed, 8 Sep 2010 20:28:58 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Help needed for my FT-736
To: <ab4ab@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <BLU133-W21B6441E6BD7A77F27F327A9730@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-7"
Hi Ben,
I haven't looked at the schematic, but I'd be much more suspecting that the
cap has shorted out than the OpAmp. Replace it and the "fuse" and see if
that doesn't fix things. If so, you're lucky. Usually the $$$ parts go
first to save the $.000x ones.
Greg KO6TH
> To: amsat-bb@xxxxx.xxx
> Date: Tue, 31 Aug 2010 18:19:44 -0400
> From: ab4ab@xxx.xxx
> Subject: [amsat-bb] Help needed for my FT-736
>
> Hi,
> My FT-736 suddenly lost all audio (apart from the scanning beep). Looks
> like the Q06 opamp in the AF Unit failed and shorted out the 1?,1/4W
> resistor (fuse), 13.8V at the supply side, 2.4V at pin 5. Could also be
> that the 2200?F cap. is shot. I can hear low level noise and signals
> using an old AF amp. connected to the J02 AF in plug so the rest of the
> rig incl. the TX appears fine. Any hints how to cure this sick baby
> will be appreciated. Searched for a NEC ?PC2002H replacement but no
> joy. Found a possible solution at:
> http://diyaudioprojects.com/Chip/DIY-TDA2050-Hi-Fi-Chip-Amplifier
> where the data sheet includes a Single Supply Typical Application
> Circuit, Fig. 3 in the pdf file @x
>
http://diyaudioprojects.com/Chip/DIY-TDA2050-Hi-Fi-Chip-Amplifier/TDA2050-Data
sheet.pdf.
> Any feedback is welcome, guess Yaesu does not carry any spare boards or
> spare parts for this old rig.
> Thanks and 73 de AB4AB
> Ben
>
>
> _______________________________________________
> 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, 9 Sep 2010 01:31:40 +0200
From: Alexandru Csete <oz9aec@xxxxx.xxx>
Subject: [amsat-bb] Re: Another Budget Launch Vehicle
To: "Trevor ." <m5aka@xxxxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTi=QgrrpbZXMTNdp3JrRBoVYyiaEnPuEyQD7_Co5@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The launch was canceled already Sunday so no more launch attempts this
time. They plan to try again in June 2011.
Until then we can enjoy these nice photos from the campaign:
http://picasaweb.google.com/thomas.tp/HEAT1XPCampaign#
Copenhagen Suborbitals has a blog where they provide frequent
technical updates: http://ing.dk/artikel/111720-teknik-news
It is in Danish but Google translator can provide understandable translation.
73
Alex OZ9AEC
On Wed, Sep 8, 2010 at 11:54 PM, Trevor . <m5aka@xxxxx.xx.xx> wrote:
> It looks like it's still awaiting launch. The launch window closes Sep 17.
>
> It's only going to an altitude of 30km, but lets hope it works and they
can move on to bigger rockets.
>
> The organisation apparently relies on voluntary donations:
>
> http://www.southgatearc.org/news/september2010/danish_rocket_launch.htm
>
> 73 Trevor M5AKA
>
> --- On Sat, 4/9/10, Jeff Davis <jeff@xxxx.xxx> wrote:
>
>> From: Jeff Davis <jeff@xxxx.xxx>
>> Subject: [amsat-bb] ?Another Budget Launch Vehicle
>> To: amsat-bb@xxxxx.xxx
>> Date: Saturday, 4 September, 2010, 1:56
>> >From Deutsche Welle News...
>>
>> Two Danish entrepreneurs are planning to launch a
>> nine-meter high space
>> rocket from a platform in the Baltic Sea on Saturday. They
>> hope it will
>> eventually pave the way for manned space flight in
>> micro-sized
>> spacecraft.
>>
>> http://goo.gl/Mw6z
>>
>> 73,
>> --
>> Jeff, KE9V
>> _______________________________________________
>> 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
>>
>
>
>
>
> _______________________________________________
> 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: 7
Date: Wed, 08 Sep 2010 11:57:56 -0400
From: David - KG4ZLB <kg4zlb@xxxxx.xxx>
Subject: [amsat-bb] Interesting article from the BBC
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Message-ID: <4C87B284.8000107@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The ever growing flock of space 'birds'
The space above us is about to get a lot more crowded.
A fascinating report from Euroconsult [220KB PDF]
<http://www.euroconsult-ec.com/news_press_release/download?name=37-1-200-satel
lites-to-be-launched-over-the-next-10-years-press-release.pdf>,
a research and analyst firm specialising in the satellite sector, has
released a forecast for how many "birds" it expects to see fly between
now and the end of the decade - 1,220 satellites.
Satellites
That's a lot of spacecraft...and a lot of rockets that will be needed to
put all those satellites in orbit.
It works out at an average of 122 satellites per year, which is up
significantly on the average annual rate of 77 satellites seen in the
2000s.
It's one more indication I guess of just how important space has become.
In money terms, Euroconsult reckons the manufacturing and launch of
those 1,220 satellites will generate revenues of some $194bn worldwide.
Rachel Villain, director for space for Euroconsult, is the editor of the
report. She told me:
"About two-thirds of these 1,220 satellites are for governments, and
that of course means the commercial sector will represent the other
one-third. Most government satellites are launched to low-Earth
orbit [a few hundred km above the Earth], while commercial companies
launch mainly in geostationary orbit [about 36,000km above the
Earth]; and almost exclusively commercial operators will launch
communications satellites into geostationary orbit. Government LEO,
on the other hand, is quite diversified - for example, Earth
observation, telecommunications, science, and also satellites to
test the technology for future satellites and new applications or
services."
A couple of good examples of demonstrators would be the recent launch by
Norway <http://www.bbc.co.uk/news/10599774> of a small spacecraft that
can track ships in its territorial waters; several nations are thinking
of doing this. And in the next few weeks, you should also hear a formal
announcement of TechDemoSat
<http://www.sstl.co.uk/news-and-events?story=1549>, a small UK platform,
funded by the government, which will prove several new sensors to study
the Earth.
In China, the scale of space activity right now is most impressive. The
China Great Wall Industry Corporation <http://www.cgwic.com/> which has
the sole rights to provide satellites for the government says it has 100
contracts for the next five years, meaning it will be launching
something like 20 rockets a year.
Satellite chart
A couple of factors contributing to the upward trend are worth noting.
One is that some of the big commercial TV satellite operators happen to
be in that part of the cycle where they need to replace and upgrade
their fleets.
And there are also some big constellations of satellites being rolled
out mid-decade. Think about Galileo - Europe's new satellite-navigation
system <http://news.bbc.co.uk/2/hi/science/nature/8442090.stm> which
will put at least 18 satellites in a medium-Earth orbit (MEO - about
23,000km up).
Think also about the satellite phone, messaging and internet operators
who want to re-new, supplement or simply establish fleets of spacecraft.
Comsat concerns like Iridium <http://www.bbc.co.uk/news/10212836>,
Globalstar, Orbcomm, and O3B will between them loft 115 spacecraft.
The numbers inevitably highlight the subject of space debris and the
need to remove redundant satellites from orbit in a timely fashion to
reduce the risks of collision.
And it illustrates, too, the headache rocket companies will face this
decade as they try first to ramp up launch rates to accommodate the rush
to orbit, and then to rescale their efforts once the backlog has been
cleared.
For more (presumably including the illustrations that will not appear in
this posting, click this!
<http://www.bbc.co.uk/blogs/thereporters/jonathanamos/2010/09/the-ever-growing
-flock-of-spac.shtml>
------------------------------
Message: 8
Date: Thu, 9 Sep 2010 06:00:47 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: thanks to K8YSE for so many grids!
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS214390504DB2E7965B6451B3730@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I'll third it! Thanks so much John for 15-17 new grids (I am not for sure
on the # - my log is buried in my pack)! I hope your trip was a success,
and I can't wait to see details once I get back!
73!
Zack
KD8KSN
EN80sd
--------------------------------------------------
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Sent: Wednesday, September 08, 2010 10:25 PM
To: <amsat-bb@xxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: thanks to K8YSE for so many grids!
> Hey John,
>
> I'll second that! Five weeks ago yesterday...... what a camping trip.
>
> Ohio wanted you back for a few months..... Florida is calling soon.
>
> Thanks for all the new girds. We can't wait to see some pictures.
>
> 73,
>
> Rick WA4NVM
>
>
>
>> Hi!
>>
>> Now that John K8YSE is back home after a month or so on the
>> road, it's time to say THANK YOU!!!! Thanks for all the grids,
>> so many that may not have been on the air in many years - if
>> ever.
>>
>> In looking through my log, preparing to send my QSL request to
>> K8YSE, I logged QSOs with K8YSE and K8YSE/VE3 in a total of 22
>> different grids. All but 2 of those are new grids for my
>> satellite log. If all of this matches up with John's log, this
>> will probably be the motivation to finally write out a satellite
>> VUCC application.
>>
>> Whenever you settle down at home, John, I'm sure there would be
>> interest in hearing about your many thousands of miles motoring
>> around Lake Superior and those very remote places in northwestern
>> Ontario. Thanks again for all your work on the road!
>>
>> 73!
>>
>>
>>
>>
>>
>> Patrick WD9EWK/VA7EWK
>> http://www.wd9ewk.net/
>>
>>
>>
>> _______________________________________________
>> 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
>>
>
> _______________________________________________
> 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: 9
Date: Thu, 9 Sep 2010 14:01:05 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
Subject: [amsat-bb] AO51 weak sig
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID:
<1491773400.508664.1284040865587.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxx
xxxx.xxx>
Content-Type: text/plain; charset=utf-8
Whats up with AO51? I can just tell that it is there .Little to no signal ?
up the output some
WA4HFN Damon
------------------------------
Message: 10
Date: Thu, 09 Sep 2010 10:28:00 -0400
From: Roger Kolakowski <Rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: AO51 weak sig
Cc: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID: <4C88EEF0.2040308@xxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
WOW! Please?
Roger WA1KAT
On 9/9/2010 10:01 AM, wa4hfn@xxxxxxx.xxx wrote:
>
>
> Whats up with AO51 I can just tell that it is there .Little to no signal ?
>
> up the output some
>
> WA4HFN Damon
> _______________________________________________
> 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: 11
Date: Thu, 9 Sep 2010 10:40:32 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] revision 1 - AO-51 schedule for September through
early October 2010
To: Amsat - BBs <amsat-bb@xxxxx.xxx>, ao51-modes@xxxxx.xxx
Message-ID:
<AANLkTinoWTRevrqn=w85GGC78SLHKeJOSNihAVH9_NAz@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello All,
Shortly after posting this I realized I got something wrong--given the
times of passes, mode changes are going to occur late in a given day
(usually 2100-2330 UTC range), using UTC dates/times (not the very
early hours of the next UTC day). So I have revised the schedule
information below to reflect this. Schedule changes should happen
Sunday evenings, Eastern Time (that hasn't changed).
Another note--when the L-band uplink is active, most users report a
better experience using a frequency tuned a few kHz "higher" than the
published frequency of 1268.700 MHz. Try something in the 1268.703 to
1268.708 MHz range...and experiement for best uplink!
________________________________
Revision 1--9/9/2010
Here is the AO-51 schedule for Sept. and early October. Thank you for
your requests.
We'll continue the mode starting October 4 through the AMSAT Symposium
and beyond. We'll post more information after we see how the bird
performs during the coming weeks.
Notes:
1) As always, the schedule for the 435.150 transmitter is subject to
change so that command stations can download telemetry files for
analysis.
2) "late UTC" and the mode change dates below translate into schedule
changes occurring over the eastern coast of the US on Sunday evenings.
3) the schedule is subject to change based on the real power budget we
experience.
September 12 (late UTC)
FM Repeater, V/U
Uplink: 145.920 MHz FM (no PL tone)
Downlink: 435.300 MHz FM
9k6 Baud PBBS Operations, L/U
Uplink: 1268.700 MHz FM at 9600 baud (no PL tone)
Downlink: 435.150 MHz FM at 9600 baud
September 19 (late UTC)
FM Repeater, V/U
Uplink: 145.920 MHz FM (no PL tone)
Downlink: 435.300 MHz FM
FM Repeater, L/U
Uplink: 1268.700 MHz FM (no PL tone)
Downlink: 435.150 MHz FM
September 26 (late UTC)
FM Repeater, V/S
Uplink: 145.880 MHz FM (no PL tone)
Downlink: 2401.200 MHz FM
9k6 Baud Telemetry, U
Uplink: none
Downlink: 435.150 MHz FM at 9600 baud
October 3 (late UTC)
FM Repeater, V/U
Uplink: 145.920 MHz FM (no PL tone)
Downlink: 435.300 MHz FM
9k6 Baud PBBS Operations, L/U
Uplink: 1268.700 MHz FM at 9600 baud
Downlink: 435.150 MHz FM at 9600 baud
On behalf of the AO-51 Operations and Command Teams,
--
Mark L. Hammond [N8MH]
------------------------------
Message: 12
Date: Thu, 09 Sep 2010 10:55:25 -0400
From: k8kfj@xxx.xxx
Subject: [amsat-bb] Re: AO51 weak sig
To: amsat-bb@xxxxx.xxx
Message-ID: <8CD1E462B351773-1094-10D2@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I'm with you Roger. I think Damon could have made it sound
more like a request instead of a command. Just my 2 cents worth.
73, Gary -K8KFJ-
Sat VUCC #125
-----Original Message-----
From: Roger Kolakowski <Rogerkola@xxx.xxx>
Cc: AMSAT <amsat-bb@xxxxx.xxx>
Sent: Thu, Sep 9, 2010 10:28 am
Subject: [amsat-bb] Re: AO51 weak sig
WOW! Please?
Roger WA1KAT
On 9/9/2010 10:01 AM, wa4hfn@xxxxxxx.xxx wrote:
Whats up with AO51 I can just tell that it is there .Little to no signal ?
up the output some
WA4HFN Damon
_______________________________________________
------------------------------
Message: 13
Date: Thu, 9 Sep 2010 10:56:20 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: AO51 weak sig
To: Roger Kolakowski <Rogerkola@xxx.xxx>, wa4hfn@xxxxxxx.xxxxxxxxxx
<amsat-bb@xxxxx.xxx>
Message-ID:
<AANLkTinzf8UjLyHROnnD12DfPnoj3G_drOHw=xsjCfzk@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Folks,
Easy said, easy done--with undesirable results....increasing the power
much from where we are right now would likely cause the batteries to
drop low enough to shut the bird OFF in an orbit or two. Not quite
the outcome you had in mind, I suspect...
We are where we are. It's all about power budget and managing what
power we have, in the circumstances we have. That is, we are in full
sunlight. But that doesn't mean we can increase the power on 435.300.
In fact, we've had to reduce it. There are limitations due to
deteriorating batteries, RFI effects (receiver desense) when the TX
power is high, battery temperatures, sun angle, nutation, and the list
goes on and on. It's a balancing act, and right now the bird is
pretty well balanced. The trade off is that we're down a couple
hundred mW on the 435.300 transmitter. It's currently running about
450 mW. It might go up a little bit before the end of the current
full illumination period (which ends Jan 1st or so), but time will
tell. We'll continue to nudge it up as the illumination angles
improve. But it might get worse before the illumination period is
over...
I'm attending the AMSAT Symposium in October. I'll be happy to sit
around and try to explain in person and in greater detail all that
we're trying to accomplish and work around, but it's honestly more
than I have time to type out....so come to the symposium and hear it
first hand :)
It's always a good time to work on improving the receiver
sensitivities of our stations :)
In the words of a famous Scotsman--"We're givin' 'er all she's got, Captain!"
73,
Mark N8MH
On Thu, Sep 9, 2010 at 10:28 AM, Roger Kolakowski <Rogerkola@xxx.xxx> wrote:
> WOW! Please?
>
> Roger ?WA1KAT
>
> On 9/9/2010 10:01 AM, wa4hfn@xxxxxxx.xxx wrote:
>>
>>
>> Whats up with AO51 ?I can just tell that it is there .Little to no signal ?
>>
>> up the output some
>>
>> WA4HFN Damon
>> _______________________________________________
>> 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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> _______________________________________________
> 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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>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 14
Date: Thu, 09 Sep 2010 10:19:22 -0500
From: Matt Patterson <mattpatt@xxxxxxxx.xxx>
Subject: [amsat-bb] AO-51 mode V/S
To: amsat-bb@xxxxx.xxx
Message-ID: <4C88FAFA.1010001@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'm wanting to try this mode but haven't had much luck finding a
downconverter. What does everyone use? Any leads as to where a
downconverter can be purchased would be much appreciated.
73 Matt
W5LL
------------------------------
Message: 15
Date: Thu, 9 Sep 2010 08:57:56 -0700 (PDT)
From: John Geiger <aa5jg@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 mode V/S
To: amsat-bb@xxxxx.xxxx Matt Patterson <mattpatt@xxxxxxxx.xxx>
Message-ID: <644928.20129.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I would guess there are plenty of used downconverters out there left over
from the AO40 days.
I think Down East Microwave might make a downconverter.
73s John AA5JG
--- On Thu, 9/9/10, Matt Patterson <mattpatt@xxxxxxxx.xxx> wrote:
> From: Matt Patterson <mattpatt@xxxxxxxx.xxx>
> Subject: [amsat-bb] AO-51 mode V/S
> To: amsat-bb@xxxxx.xxx
> Date: Thursday, September 9, 2010, 10:19 AM
> I'm wanting to try this mode but
> haven't had much luck finding a
> downconverter.? What does everyone use?? Any
> leads as to where a
> downconverter can be purchased would be much appreciated.
>
> 73 Matt
> W5LL
>
> _______________________________________________
> 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: 16
Date: Thu, 9 Sep 2010 16:32:08 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 mode V/S
To: Matt Patterson <mattpatt@xxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<650995568.812622.1284049928437.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
Hello Matt
There were a lot of converted MMDS converted downconverters from the the
AO-40 (sobsob) days.? I have a couple I dearly cling to, with hopes of a
future HEO.? There are some commercial ones from Keps, SSB
http://www.ssbusa.com/modes.html .? and few others. These can be a bit
pricey.? Try to find a AIDC 3731 downconverter by Transystems.? These were
converted and sold by K5GNA again back in the AO-40 (sobsob) days.? They
were an excellent dc and reasonably priced.? Once a dc is procured a tv type
18 inch dish with a 5 turn helix feed in front of it makes a super antenna.?
A simple 8-16 turn helix is another option as well as yagi antennas used for
wifi are effective.? There a many ways to work this problem.? If we had a
HEO in the works this bb would be flooded with information, with lots of
deals.? Good luck with your efforts.? Mode S on AO-51 is fun to experiment
with.
73 Bob W7LRD
Seattle
----- Original Message -----
From: "Matt Patterson" <mattpatt@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Thursday, September 9, 2010 8:19:22 AM
Subject: [amsat-bb] ?AO-51 mode V/S
I'm wanting to try this mode but haven't had much luck finding a
downconverter. ?What does everyone use? ?Any leads as to where a
downconverter can be purchased would be much appreciated.
73 Matt
W5LL
_______________________________________________
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
------------------------------
_______________________________________________
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!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 5, Issue 373
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