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CX2SA > SATDIG 02.12.10 17:35l 929 Lines 31080 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Ragchewing on AO-51 (Patrick Farcon)
2. Re: Ragchewing on AO-51 (John Neeley)
3. Re: Ragchewing on AO-51 (Rick Tejera)
4. Re: HO-68 Beacon? (George Henry)
5. KiwiSAT aupplies help (Fred Kennedy)
6. Re: HO-68 Beacon? (P.H.)
7. Re: Ragchewing AO-51 (Bob- W7LRD)
8. EM04/DM94 (ted)
9. utility/educational electronic kits for sale cheap - source
located (Kensington, MD) (Samudra Haque)
10. WD9EWK @ Mesa AZ hamfest, Saturday (4 December)
(Patrick STODDARD (WD9EWK/VA7EWK))
11. Re: WD9EWK @ Mesa AZ hamfest, Saturday (4 December) (Rick Tejera)
12. Highest data rate achieved in the Amateur Satellite Service
(Jim List)
13. Re: Highest data rate achieved in the Amateur Satellite
Service (GW1FKY@xxx.xxxx
14. AO-51 pass 1230UTC 12/2 (n0jy@xxxxxxx.xxxx
15. Re: Highest data rate achieved in the Amateur Satellite
Service (Mark L. Hammond)
----------------------------------------------------------------------
Message: 1
Date: Wed, 1 Dec 2010 15:24:25 -0500
From: Patrick Farcon <pfarcon@xxxxx.xxx>
Subject: [amsat-bb] Re: Ragchewing on AO-51
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <93953FC4-FC6D-48EE-8F67-3EFFD75CA399@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I agree with you John. My schedule at work often only makes the dreadfully
early morning passes before 6am possible for me. I have often spoken with
Craig W1MED and Carm WO3T roundtable style in the early mornings. Now if I
could only figure how to stay warm at those hours since I am still using a
portable setup. Lol!
73,
Pat
N2VYT
Sent from my iPad
------------------------------
Message: 2
Date: Wed, 1 Dec 2010 12:35:40 -0800 (PST)
From: John Neeley <w6zkh@xxx.xxx>
Subject: [amsat-bb] Re: Ragchewing on AO-51
To: Patrick Farcon <pfarcon@xxxxx.xxx>, "amsat-bb@xxxxx.xxxx
<amsat-bb@xxxxx.xxx>
Message-ID: <96011.53306.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Sounds like Loren, K7CWQ standing out on his driveway in a snowstorm,
heh...course he did make WAS & VUCC using his HT and Arrow all on
FM.....hearty
youngster I must say...hi..
John W6ZKH
________________________________
From: Patrick Farcon <pfarcon@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Sent: Wed, December 1, 2010 12:24:25 PM
Subject: [amsat-bb] Re: Ragchewing on AO-51
I agree with you John. My schedule at work often only makes the dreadfully
early
morning passes before 6am possible for me. I have often spoken with Craig
W1MED
and Carm WO3T roundtable style in the early mornings. Now if I could only
figure
how to stay warm at those hours since I am still using a portable setup. Lol!
73,
Pat
N2VYT
Sent from my iPad
_______________________________________________
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: 3
Date: Wed, 1 Dec 2010 16:28:21 -0700
From: "Rick Tejera" <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Re: Ragchewing on AO-51
To: "'John Neeley'" <w6zkh@xxx.xxx>, "'Patrick Farcon'"
<pfarcon@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<20101201232908.IHMN22411.fed1rmmtao103.cox.net@xxxxxxxxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
The early passes on AO-51 for me occur just as I'm getting ready for work.
That being said, I do enjoy the LATE passes on SO-50 when they occur and the
late passes on SO-67 when it's available to NA. Form DM33 (Arizona) passes
after 2000 Local are generally open. A few nights a go I had a Nice QSO
with Kerry, WC7V on birds. It is refreshing to get more than the usual
exchange of calls & grids.
BTW, SO-67 is a nice bird to work with a hand held. With the continuous
carrier it's easy to stay on the bird.
Clear Skies
Rick Tejera
Editor SACnews,
Public Outreach Coordinator
Saguaro Astronomy Club
Phoenix, Arizona
www.saguaroastro.org
saguaroastro@xxx.xxx
K7TEJ, AMSAT 38452
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of John Neeley
Sent: Wednesday, December 01, 2010 13:36
To: Patrick Farcon; amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Ragchewing on AO-51
Sounds like Loren, K7CWQ standing out on his driveway in a snowstorm,
heh...course he did make WAS & VUCC using his HT and Arrow all on
FM.....hearty
youngster I must say...hi..
John W6ZKH
________________________________
From: Patrick Farcon <pfarcon@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Sent: Wed, December 1, 2010 12:24:25 PM
Subject: [amsat-bb] Re: Ragchewing on AO-51
I agree with you John. My schedule at work often only makes the dreadfully
early
morning passes before 6am possible for me. I have often spoken with Craig
W1MED
and Carm WO3T roundtable style in the early mornings. Now if I could only
figure
how to stay warm at those hours since I am still using a portable setup.
Lol!
73,
Pat
N2VYT
Sent from my iPad
_______________________________________________
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.
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Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Wed, 1 Dec 2010 17:41:17 -0600
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: HO-68 Beacon?
To: "amsat bb" <amsat-bb@xxxxx.xxx>
Message-ID: <A23B40EEAEF041F8952606898D1C5B2B@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Interestingly, the other day it was beaconing that it was in FM mode, but
was clearly on the linear transponder (as the schedule said it should be)...
George, KA3HSW
----- Original Message -----
From: "Peter Ng" <ve7ngp@xxxxx.xx>
To: <peter.moscatt@xxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Wednesday, December 01, 2010 11:39 AM
Subject: [amsat-bb] Re: HO-68 Beacon?
> Hi Peter,
> Yes, I've heard the beacon regardless of modes...
>
> 73's Peter VE7NGP
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf
> Of Peter Moscatt
> Sent: Wednesday, December 01, 2010 3:14 AM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] HO-68 Beacon?
>
> Hi All,
>
> As this satellite has been placed on an initial schedule with regards
> to the On Times for both the Transponder and Repeater, does the Beacon
> operate regardless of the status of the bird?
>
> Pete VK4CCV
> _______________________________________________
------------------------------
Message: 5
Date: Thu, 02 Dec 2010 12:55:13 +1300
From: "Fred Kennedy" <fredk@xxxxx.xxx.xx>
Subject: [amsat-bb] KiwiSAT aupplies help
To: amsat-bb@xxxxx.xxx
Message-ID: <4CF6E061.26484.10670D0@xxxxx.xxxxx.xxx.xx>
Content-Type: text/plain; charset=US-ASCII
Hi Guys,
Can anyone point me to a small quantity supply source of a space
quality thermally conductive
epoxy for KiwiSAT please?
We will need probably less than 10 gms total over the next - and last -
few months of her
construction but it has to be usable in 'small mixes' on an 'as required
basis'. ("Two tube" technology!)
Tra-Con 2151 is ideal ( and samples have been used ) but MOQ's of 100 x 3gm
"one mix" packets is
not an option. We look after every cent/penny of your very generous
donations and throwing out
90% of the mix every time we need a few mg. is not seen as financially
responsible!
(Unfortunately, absolutely no potential for aerospace "lunch box
Cadillacs" down here in NZ!)
Thanks,
Fred Kennedy (ZL1BYP)
KiwiSAT Project.
------------------------------
Message: 6
Date: Thu, 2 Dec 2010 00:33:54 +0000
From: "P.H." <bbjunkie@xxx.xxx>
Subject: [amsat-bb] Re: HO-68 Beacon?
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTimCUGyTWZwa61SCaV8Kt_DdRbVcjJni5FxsdqHP@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
That's odd!
Another oddity;
I noticed on Tuesday night (I think it was) that it didnt wake up for the
second European pass of the evening, 20:20 - 21:05 UTC
Just a FYI !
73
Pete
MI3EPN
On Wed, Dec 1, 2010 at 11:41 PM, George Henry <ka3hsw@xxx.xxx> wrote:
> Interestingly, the other day it was beaconing that it was in FM mode, but
> was clearly on the linear transponder (as the schedule said it should
> be)...
>
>
> George, KA3HSW
>
>
>
> ----- Original Message -----
> From: "Peter Ng" <ve7ngp@xxxxx.xx>
> To: <peter.moscatt@xxxxx.xxx>; <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, December 01, 2010 11:39 AM
> Subject: [amsat-bb] Re: HO-68 Beacon?
>
>
> > Hi Peter,
> > Yes, I've heard the beacon regardless of modes...
> >
> > 73's Peter VE7NGP
> >
> > -----Original Message-----
> > From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> > Behalf
> > Of Peter Moscatt
> > Sent: Wednesday, December 01, 2010 3:14 AM
> > To: amsat-bb@xxxxx.xxx
> > Subject: [amsat-bb] HO-68 Beacon?
> >
> > Hi All,
> >
> > As this satellite has been placed on an initial schedule with regards
> > to the On Times for both the Transponder and Repeater, does the Beacon
> > operate regardless of the status of the bird?
> >
> > Pete VK4CCV
> > _______________________________________________
>
> _______________________________________________
> 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: Thu, 2 Dec 2010 00:55:40 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Ragchewing AO-51
To: John Papay <john@xxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<754462135.46038.1291251340870.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
Modes L and or S on AO51 enable us to do the same thing.? Just a few of us
left over AO-40 (sobsob) ops.
73 Bob W7LRD
----- Original Message -----
From: "John Papay" <john@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Wednesday, December 1, 2010 10:20:02 AM
Subject: [amsat-bb] ?Ragchewing AO-51
The recent time change from daylight savings to
standard time, coupled with the shifting of AO-51
passes over North America to much earlier morning times,
makes it possible to actually have a QSO on AO-51
that lasts longer than a few seconds.
All three morning AO-51 passes had only a few stations
calling in today. ?It is possible to have a 10 minute
qso or roundtable that is normally only appropriate on
a linear bird. ?Most of the morning AO-51 passes for the
last few days have been just noise. ?I look at the recordings
and not seeing much voice audio, I don't put them on the
website. ?This morning's passes are on the website and you
can tell it's very early. ?Even KJ4CBC, who is a morning regular,
seemed a bit drousy.
????????http://www.papays.com/sat/general.html
Of course, morning is really the middle of the night for most
of us. ?The passes today were at 0950z, 1129z and 1311z. ?There
was an Atlantic pass at 0814z where there were no stations heard.
Daytime passes, of course, are a different story with 20 plus
stations trying to make contacts. ?But you can take advantage of
those early morning passes and have some good conversation on FM.
Activity could pick up to the point where longer qso's are not
appropriate, but considering these early pass times, that shouldn't
be a problem anytime soon. ?Set your alarm and the coffee pot timer.
Let's use AO-51 while we still have her.
73,
John K8YSE
_______________________________________________
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: 8
Date: Wed, 01 Dec 2010 20:32:58 -0600
From: ted <aa5ck@xxx.xxx>
Subject: [amsat-bb] EM04/DM94
To: amsat-bb@xxxxx.xxx
Message-ID: <4CF7055A.8090406@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks to everyone who added to the enjoyment of my short stay on the
100th Meridian today! Great to talk to everyone and icing on the cake to
provide new grids for several.
I'll try to get cards made up and sent out before too long. No SASEs or
return cards are necessary.
73....ted....aa5ck
------------------------------
Message: 9
Date: Wed, 1 Dec 2010 23:15:52 -0500
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] utility/educational electronic kits for sale cheap
- source located (Kensington, MD)
To: Tacos <Tacos@xxxxx.xxx>, Amsat-bb <amsat-bb@xxxxx.xxx>,
amsat-dc@xxxxx.xxx
Message-ID:
<AANLkTimTTNhu_8R8iwiqbFuwrOMapUSYJSSJLbJMi9uf@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Amrad, Amsat folks. Some of you may appreciate picking up a few of
these utility electronic kits, for yourself, or your younger
generation SWL/DX and ham radio friends: they are all useful for your
radio shack. I am planning to pick up a few myself if I have the time.
Perhaps we could pool together a purchase lot?
Please contact the original seller, Robert Lavoie for purchase:
sale-r3rbj-2087904408@xxxxxxxxxx.xxx
Huge assortment of Velleman/CanaKit audio kits, factory fresh in
sealed original boxes, unopened. original buyer, perfect for audio
hobbyists or electronics minded. There are literally over 80 kits in
this assortment, everything from power supply kits to audio
amplifiers, led displays, etc. Retail value of these items today
exceeds $2000.00. Liquidation. Could make excellent XMAS gift(s).
Individual kits are available. Also available are numerous Radio Shack
black ABS project boxes, Calrad VU meters, potentiometers, Plitron low
voltage toroidal transformers, many values, lots and lots of stuff.
All negotiable Might be good for a school or laboratory for
electronics. All prices negotiable .
Velleman K2637 Super Mini 2.5 watt audio amplifier (quantity 21)
current retail $12.50 Velleman MK 138 Thermostat (quantity 1)
Velleman K4001 7 watt audio amplifier (quantity 2) current retail 14.69
Velleman MK 105 signal generator (quantity 7) current retail $5.23
Velleman K2570 universal pwr supply 5-14 volts (quantity 6) current
retail $16.15
Velleman K2573 Stereo RIAA correction kit (quantity 3) current retail $14.73
Velleman KK4102 guitar preamplifier/headphone amp (quantity 7) current
retail $32.77
Velleman K2032 3 digit panle meter (quantity 3) current retail $55.90
Velleman K4900 telephone amplifier (quantity 4) current retail $14.15
Velleman K1823 1 amp pwr supply (quantity 1) current reail $12.31
Velleman K4003 2 by 30 watt stereo amplifier (quantity 2) current retail
$28.00
Velleman K2579 stop/start timer (quantity 1) current retail $ 13.38
Velleman K6001 temperature sensor kit (quantity 1) current retail $22.92
Velleman K7203 3-30 volt/ 3 ampere pwr supply (quantity 3) current retail
$43.54
Cana Kit UK 193 20 watt bridged audio amplifier ( quantity 2) current
retail $35.90
Cana Kit UK 205 mini sine wave generator (quantity 2) current retail $17.95
Cana Kit R 290 2 by 35 watt RMS audio amplifier (quantity 9) current
retail $70.00
Cana Kit CK 161 10 watt amplifer w.microphone preamplifer (quantity 1)
current retail $22.95
Cana Kit UK 3405 + -- 5 volts/300 and 100 ma pwr supply (qunatity 2)
current retail $10.00
Cana Kit CK008 dynamic microphone amplifier (quantity 2) current retail $13.95
Cana Kit R146 advanced stereo tone control (bass/treble.volume/pan)
(quantity 1) current retail $26.45
Cana Kit CK 104 SQ 5 led VU display (quantity 1) current retail $12.95
Cana Kit CK 151 2.5 watt microphone preamplifier (quantity 3) current
retail $17.95
73 de N3RDX
------------------------------
Message: 10
Date: Wed, 1 Dec 2010 20:41:03 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] WD9EWK @ Mesa AZ hamfest, Saturday (4 December)
To: amsat-bb@xxxxx.xxx
Message-ID: <202206.43695.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I will have an AMSAT table at the Superstition Amateur Radio
Club's hamfest in Mesa, Arizona, on Saturday, 4 December 2010.
The hamfest will be in the southwest parking lot of Mesa
Community College, along Dobson Road between Southern Avenue
and the t, WD9EWK will be on several satellites for
on-air demonstrations, FM and SSB. If you hear me on the air
Saturday morning, please feel free to give me a call. If you
work WD9EWK and would like a QSL card, please e-mail me with
the QSO details to check against my log. If you're in the log,
I'll send a card.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 11
Date: Wed, 1 Dec 2010 21:53:13 -0700
From: Rick Tejera <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Re: WD9EWK @ Mesa AZ hamfest, Saturday (4
December)
To: "amsat-bb@xxxxxx.xxxx <amsat-bb@xxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <5B598310-60AC-48EC-B6ED-290C64E3BC68@xxx.xxx>
Content-Type: text/plain; charset=us-ascii
Patrick,I'll see you there.
Sent from my iPod
Rick Tejera
Editor, SACnews
Saguaro Astronomy Club
www.saguaroastro.org
K7TEJ
On Dec 1, 2010, at 21:41, "Patrick STODDARD \(WD9EWK/VA7EWK\)"
<amsat-bb@xxxxxx.xxx> wrote:
> Hi!
>
> I will have an AMSAT table at the Superstition Amateur Radio
> Club's hamfest in Mesa, Arizona, on Saturday, 4 December 2010.
> The hamfest will be in the southwest parking lot of Mesa
> Community College, along Dobson Road between Southern Avenue
> and the US-60 freeway. This is a half-day hamfest, starting
> early in the morning and wrapping up by noon.
>
> During the hamfest, WD9EWK will be on several satellites for
> on-air demonstrations, FM and SSB. If you hear me on the air
> Saturday morning, please feel free to give me a call. If you
> work WD9EWK and would like a QSL card, please e-mail me with
> the QSO details to check against my log. If you're in the log,
> I'll send a card.
>
> 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: 12
Date: Thu, 2 Dec 2010 09:54:40 -0000
From: "Jim List" <jimlist@xxxxxx.xx.xxx>
Subject: [amsat-bb] Highest data rate achieved in the Amateur
Satellite Service
To: <amsat-bb@xxxxx.xxx>
Message-ID: <005701cb9206$f0536f50$d0fa4df0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi,
I would be interested to know what the highest data rate achieved from an
amateur satellite is/was. I seem to recall some sats using 38.4K but not
sure if this is true, or how successful they were.
I'm guessing that use of 'normal' amateur radio rigs, eg ICOM 910 isnt
really practical for these higher data rates (although I know of an add one
unit from Symek, which will provide higher bandwidth from the 910, and other
radios).
c 2010 06:23:00 EST
From: GW1FKY@xxx.xxx
Subject: [amsat-bb] Re: Highest data rate achieved in the Amateur
Satellite Service
To: jimlist@xxxxxx.xx.xxxx amsat-bb@xxxxx.xxx
Message-ID: <16f359.2833c6a9.3a28db94@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi Jim,
You are quite correct 48K data rates have been used on amateur satellites.
I trust that it is OK with Mark Hammond but here is a copy of a recent
posing on the BBS regarding experiments to be carried out on AO -51.
James Miller was I recall very involved in the use of higher data rate
exchange and you might find some information posted on this. Another good
source are the listings of the operational frequencies and modes
of operation that are posted on a number of well known web sites including
Japan.
The main problem and concern of course is the need to modify equipment to
be able cope with these higher
rates. As you state modems are available but the inclusion in the
equipment can be quite costly and i am not sure about the validity of
warranty if
you do make these additions.
Another concern is that with the LEO's tracking and the doppler shift are
a very significant factor , however
with such short pass times of course the higher rate of date exchange is a
very valuable asset especially
with pictures
Cheers
Ken de GW1FKY
Hello All,
Just a reminder that we'll be running a few days of 38k4 packet
beginning Su/2500 in FM mode with filters set to 50 kHz (NOT
Wide-FM) (I think that's the right filter width).
Please remember Douglas Quagliana's KA2UPW soundcard decoder (as
presented in the AMSAT Journal a few issues back) that can be
downloaded here: http://www.quagliana.com/ Look for Willow and
Sabins. I suggest you get the software and test it out at 9600
before you attempt 38,400, so to become familiar with how it works
with your receiver. It does work at 38k4--but remember you must have
an appropriate receiver!
It is possible to use some of the SDR stuff I'm sure, if you record
with your SDR software and play back through KA2UPW's Willow program.
I have a few options in my shack, as I've been running 38k4 since the
good old UoSat days:
Receivers capable of 38k4 (up to 76k, actually):
TS-2000x with Symek IF board
TS-790A with Symek IF board
Icom PCR-1500
For decoding:
Paccomm Spirit/Sprint-2 Satellite TNC models with 38k4 filters installed
Willow
My preferred combination is the TS-2000x with Symek IF board feeding a
Pacomm Sprint-2 satellite model. I seem to get the best performance
out of this combo.
Here's a reminder of the schedule:
November 14 (late UTC)
38k4 Baud PBBS Operations, L/U
Uplink: 1268.705 MHz FM at 9600 baud
Downlink: 435.150 MHz FM at 38,400 baud
November 18 (late UTC)
FM Repeater, L/SU
Uplink: 1268.705 MHz FM (no PL tone)
Downlinks: 2401.200 MHz FM *and* 435.300 MHz FM (at low power!)
73!
--
Mark L. Hammond [N8MH]
_______________________________________________
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: 14
Date: Thu, 2 Dec 2010 07:34:41 -0600 (CST)
From: n0jy@xxxxxxx.xxx
Subject: [amsat-bb] AO-51 pass 1230UTC 12/2
To: amsat-bb@xxxxx.xxx
Message-ID: <55657.170.49.217.216.1291296881.squirrel@xxxxxxx.xxx>
Content-Type: text/plain;charset=iso-8859-1
Hello all,
I was attempting to make some contacts on the 1230UTC pass of AO-51 this
morning, from the mobile on my way to work. We have a bit of a commuter
roundtable on 2m in the morning and I invited some of the others to tune
in to see what we could hear.
The downlink was weak enough that the pass was at best barely workable,
but right at the beginning I did have a good enough signal to copy that a
station came back to my call. I didn't copy the call though, so it was
not a contact but it appears that I was heard well enough on the uplink...
so I would appreciate it if the station(s) who heard me would let me know
what my uplink signal quality was, that I can determine whether it's worth
it to try to work the bird again during a "commute" pass.
If so maybow commuters on the bird!
Thanks and 73,
Jerry
N0JY
------------------------------
Message: 15
Date: Thu, 2 Dec 2010 11:26:08 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Highest data rate achieved in the Amateur
Satellite Service
To: GW1FKY@xxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTi=H=gDPFbwv=LKJqPe+wfO=uhrj=-eGF2dG=o33@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Jim and Ken,
As far as I can recall, the only high speed packet capable amateur
bird operational and in orbit is AO-51. We've run it at 38k4
recently. It works OK. Other birds have been in orbit and
operational years ago (you can google them--I'll leave somebody out or
get it wrong if I try to list them (KO-23? MO-36? UO-22?). I think
I've worked them all. Candidly, AO-51 doesn't run 38k4 as well as
the older birds used to--and there is no apparently reason or setting
to tweak to make it awesome.
AO-51 has the potential to run at 57k6 and even 76k8--but I honestly
don't know if it has ever been tested in-orbit since launch. Keep in
mind the birds normally receive at 9k6 only (although in theory they
can go higher), so most hams are 9k6 transmit capable, but not any
higher (and the TNC modems are usually configured this way, as
well--38k4 receive, 9k6 transmit).
Going from 9k6 to 38k4 requires more "oomph" from the satellite in
terms of output power in order to copy it (well, more signal into your
receiver is needed the higher you go due to the width of the signal,
etc. ).
Personally, I have two rigs with Symek boards (see below) that should
in theory be capable up to 76k8, but the fastest TNC modems I have in
the shack are set to 38k4. So, I can't even experiment at those
speeds without a substantial investment.
Yes, you can modify an IC-910 for high speed packet. The mod to the
TS-2000x was MUCH easier than the TS-790 (which didn't even do 9k6 out
of the box!).
My "dream" is for a Flex 5000 with the U/V modules in it, and THEN for
some clever software decoders to be written at 38k4 or higher so no
TNC is required--it's all done in software!!!. But then again, there
is only 1 bird that can run at that speed, and it's a rare
occurrence....so it's not worth spending money I don't have for
software decoders that don't exist for one aging satellite...
I'd like somebody to comment on P3E and what it is likely to do
packet-wise....I know the info is out there, but it's not in my brain
:)
73!
Mark N8MH
______________
Hi,
I would be interested to know what the highest data rate achieved from an
amateur satellite is/was. I seem to recall some sats using 38.4K but not
sure if this is true, or how successful they were.
I'm guessing that use of 'normal' amateur radio rigs, eg ICOM 910 isnt
really practical for these higher data rates (although I know of an add one
unit from Symek, which will provide higher bandwidth from the 910, and other
radios).
Is anyone planning to use a higher data rate?
I'd be interesting to read any comments folk might have.
73
Jim G3WGM
On Thu, Dec 2, 2010 at 6:23 AM, <GW1FKY@xxx.xxx> wrote:
> Hi Jim,
> You are quite correct ?48K data rates have been used on amateur ?satellites.
> I trust that it is OK with Mark Hammond but here is a copy of a recent
> posing on the BBS regarding experiments to be carried out on AO -51.
> James Miller was I recall very involved in the use of higher data rate
> exchange and you might find some information posted on this. ? ? Another
good
> source are the listings of the operational frequencies and ?modes
> of operation that are posted on a number of well known web sites including
> Japan.
> The main problem and concern of course is the need to modify equipment to
> be able cope with these higher
> rates. ?As you state modems are available but the inclusion in the
> equipment can be quite costly and i am not sure about the validity of
warranty ?if
> you do make these additions.
> Another concern is that with the LEO's tracking and the doppler ?shift are
> a very significant factor , however
> with such short pass times of course the higher rate of date exchange ?is a
> very valuable asset especially
> with pictures
>
> Cheers
> Ken de GW1FKY
>
>
> ?Hello All,
>
> Just a reminder that we'll be running a few days of ?38k4 packet
> beginning Sunday afternoon/evening until Thursday ?afternoon/evening,
> as per the schedule below. ?Note the voice repeater ?will be OFF.
>
> Please keep in mind that receiving packet at 38k4 requires ?more than
> your "stock" FM receiver and TNC. ?Generally speaking, folks ?are using
> a Symek board installed in their satellite radio to tap the IF ?which
> is then fed to a high speed TNC. ?Other options for a receiver ?include
> a PCR-1000/1500/2500 in FM mode with filters set to 50 kHz ?(NOT
> Wide-FM) ?(I think that's the right filter width).
>
> Please ?remember Douglas Quagliana's KA2UPW soundcard decoder (as
> presented in the ?AMSAT Journal a few issues back) that can be
> downloaded here: ? http://www.quagliana.com/ ? ? Look for Willow ?and
> Sabins. ? ?I suggest you get the software and test it out at ?9600
> before you attempt 38,400, so to become familiar with how it ?works
> with your receiver. ? It does work at 38k4--but remember you ?must have
> an appropriate receiver!
>
> It is possible to use some of the ?SDR stuff I'm sure, if you record
> with your SDR software and play back ?through KA2UPW's Willow program.
>
> I have a few options in my shack, as ?I've been running 38k4 since the
> good old UoSat days:
>
> Receivers ?capable of 38k4 (up to 76k, actually):
> TS-2000x with Symek IF ?board
> TS-790A with Symek IF board
> Icom PCR-1500
>
> For ?decoding:
> Paccomm Spirit/Sprint-2 Satellite TNC models with 38k4 filters ?installed
> Willow
>
> My preferred combination is the TS-2000x with Symek ?IF board feeding a
> Pacomm Sprint-2 satellite model. ?I seem to get the ?best performance
> out of this combo.
>
> Here's a reminder of the ?schedule:
>
> November 14 (late UTC)
> 38k4 Baud PBBS Operations, ?L/U
> Uplink: 1268.705 MHz FM at 9600 baud
> Downlink: 435.150 MHz FM at ?38,400 baud
>
> November 18 (late UTC)
> FM Repeater, L/SU
> Uplink: ?1268.705 MHz FM (no PL tone)
> Downlinks: 2401.200 MHz FM *and* 435.300 MHz FM ?(at low power!)
>
> 73!
> --
> Mark L. Hammond ?[N8MH]
> _______________________________________________
> 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
>
--
Mark L. Hammond [N8MH]
------------------------------
_______________________________________________
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 5, Issue 475
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