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CX2SA > SATDIG 06.05.08 11:20l 816 Lines 23706 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Cubesat Antenna Modeling and truth? (Anthony Monteiro)
2. AO-51 mode L/S QSB (Piero Baudino)
3. AMSAT/TAPR Banquet (Martha)
4. Trackbox (renauld halbardier)
5. TLE lottery (Jeroen Vreeken)
6. AO-51 L/S (n1jez(AT)burlingtontelecom.net)
7. Not heard DELFI over Japan (ji1izr/Masahiro SANADA)
8. Re: Trackbox (Alan)
9. Re: Trackbox (Alan)
10. Re: TLE lottery (Alan Cresswell)
11. Delfi-c3 shutting down and rebooting. (Charles Reiche)
12. Re: TLE lottery (Colin Hurst)
13. Re: Trackbox (Jack E. Davis)
14. Re: TrakBox (Jack E. Davis)
15. Re: TLE lottery (Mike Rupprecht)
16. Re: TrakBox (Jack E. Davis)
17. Re: AO-51 mode L/S QSB (Luc Leblanc)
18. Hamsat Greetings (Prathap Kumar)
----------------------------------------------------------------------
Message: 1
Date: Mon, 05 May 2008 15:34:08 -0400
From: Anthony Monteiro <aa2tx(AT)comcast.net>
Subject: [amsat-bb] Re: Cubesat Antenna Modeling and truth?
To: bruninga(AT)usna.edu, <amsat-bb(AT)amsat.org>
Message-ID: <20080505193627.855JaRd00WWhC(AT)mailbox6.ucsd.edu>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 12:12 PM 5/4/2008, Robert Bruninga wrote:
>A big problem on small satellites (cubesats) is how to match
>antennas...
>...
>Has anyone had other successes? Just thinking what we should be
>telling these students that are building cubesats. A 6" whip
>for 70cm is not too bad on a 4" cubesat, but 2m is compltely
>different...
Hi Bob,
This problem is not new. Walt Maxwell, W2DU had the same problem
when working on antenna for big satellites at RCA Astro-Electronics.
His solution was to use ferrites to decouple the feed cable from the
satellite body. Then you can just use a directional coupler outside
the satellite to measure the return loss.
I have used this and it works pretty well as long as you keep the feed
cables at 90 degrees from the antenna E field. You can use the EZNEC
model to determine the expected E-field.
You need to make sure the ferrites provide at least 10x the impedance
of the antenna at the satellite (i.e. if you expect 35 ohms for the antenna,
you need at least 350 ohms from the ferrites.) Also, you MAY need to
break up any resonances on the cable by putting ferrites every 1/8 wavelength
on the feed cable if you cannot get the cable at a true 90 degrees.
Note that 90 degrees will not likely be directly broadside from the satellite
especially for a 4" cube on 2 meters.
73,
Tony AA2TX
------------------------------
Message: 2
Date: Mon, 05 May 2008 22:03:58 +0200
From: Piero Baudino <pbaudino(AT)formatnet.it>
Subject: [amsat-bb] AO-51 mode L/S QSB
To: amsat-bb(AT)amsat.org
Message-ID: <481F682E.7010501(AT)formatnet.it>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Hi all,
just worked AO-51 in mode L/S over EU starting at about 19.45 UTC.
I can notice a very deep qsb from about S3 (converter noise) to S9+20.
I can't remember a so deep qsb in the past, 1-2 years ago the sat in
this mode was with very "stable" signals.
Is AO-51 not well stabilized ? Any info from command stations ?
My working setup is:
RTX: Icom IC-910
converter: DB6NT 2,4 Ghz to 144 Mhz, 0.43 dB NF
antenna: grid 70x70 cm. oriz. pol.
Best '73 de Piero IZ1ERR
------------------------------
Message: 3
Date: Mon, 5 May 2008 17:55:35 -0400
From: Martha <martha(AT)amsat.org>
Subject: [amsat-bb] AMSAT/TAPR Banquet
To: amsat-bb(AT)amsat.org, "Board of Directors" <bod(AT)amsat.org>,
officers(AT)amsat.org
Message-ID:
<956751cf0805051455x1d6667f3jbd0372d5b2bc3d76(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
The following people have paid for banquet tickets as of today:
Bob Stricklin
Bill Reed
Tony Hutchinson
Robin Haighton
Randy Kohlewey
Mark Hammond
Tim Pirkl
Mel Whitten - 2 tickets
Mel Preston
Alan Biddle
Larry Brown
Keith Schlottman
Howard Long
Steve Sanger
Bob Felt
Steve Gunsel
Stan Gunsel
Nigel Johnson - 2 Tickets
Wilse Morgan
Gould Smith
Nancy Makley
Tom Clark
Doug Quigliana
Barry Baines
August Frebig
Keith Pugh
Roger Ley
Dee Interdonato
Michelle Thompson
Paul Williamson
Roger Boncichi
Lou McFadin
Richard Hagen
Mark Hammond
Eric Ellison
Phil Harman
Leo Voelkle
Walt Wittenburg
Steve Belter
Joe Fisher - 4 tickets
Rick Hambly
Chuck Pinkham
Jim Randall
Ian MacFarquhar
Dave Toth
John Shew
Tony Kujims
Harry Lees
Steve Bible - 2 Tickets
Bruce Perens
Mike Swiader
John Germanos - 2 tickets
Frank Brickle
Larry Stoskopf
--
73- Martha
------------------------------
Message: 4
Date: Tue, 6 May 2008 00:04:47 +0200
From: "renauld halbardier" <renauld.halbardier(AT)skynet.be>
Subject: [amsat-bb] Trackbox
To: <amsat-bb(AT)amsat.org>
Message-ID: <007701c8aefc$082ede20$0406902c(AT)3ghz>
Content-Type: text/plain; charset="iso-8859-1"
hello all
my 'old' trackbox (dusty!) ,after 5 years of sleep, doesnt work in stand
alone mode anymore ; terminal mode works perfectly. Ram has been cleared ,
clock adjusted, new keplers loaded ; version is 3.50b.
Any ideas ?
73
renauld on4kvi
------------------------------
Message: 5
Date: Tue, 06 May 2008 01:02:29 +0200
From: Jeroen Vreeken <pe1rxq(AT)amsat.org>
Subject: [amsat-bb] TLE lottery
To: amsat-bb(AT)amsat.org
Message-ID: <481F9205.4060008(AT)amsat.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
For the last few days I used object H (#32790) for tracking Delfi-C3. It
is also the current object mentioned on the delfi-c3 website.
However the last few passes it seems that it is getting increasingly late.
Object J (#32791) seems to fit much better....
Is anybody else seeing the same?
73,
Jeroen PE1RXQ
------------------------------
Message: 6
Date: Mon, 5 May 2008 19:20:48 -0400
From: <n1jez(AT)burlingtontelecom.net>
Subject: [amsat-bb] AO-51 L/S
To: "AMSAT BB" <amsat-bb(AT)amsat.org>
Message-ID: <000501c8af06$a8326a40$6901a8c0(AT)Mike2>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Got on AO-51 L/S tonight at 2306 UTC for the first time in a _long_ time.
Had the pleasure of working Clare, VE3NPC. Other than that, very quiet.
Maybe more folks will be around for the next pass??
73,
Mike N1JEZ
AMSAT #29649
"A closed mouth gathers no feet"
------------------------------
Message: 7
Date: Tue, 6 May 2008 10:56:05 +0900
From: "ji1izr/Masahiro SANADA" <ji1izr(AT)jamsat.or.jp>
Subject: [amsat-bb] Not heard DELFI over Japan
To: "AMSAT" <amsat-bb(AT)AMSAT.Org>
Message-ID: <000501c8af1c$5dc4c1e0$abcfa8c0(AT)hamateurh6ixw2>
Content-Type: text/plain; charset="iso-2022-jp"
Hello, this is ji1izr/Masahiro.
I heard emergency sound of DELFI
at 23:50 through 00:00 UTC over Japan.
Nothing heard at 01:25 through 01:35.
***************************
Masahiro Sanada
de ji1izr
Hiratsuka-city
Kanagawa,Japan
ji1izr_1975(AT)nifty.com
ji1izr(AT)jarl.com
ji1izr(AT)jamsat.or.jp
web: http://ji1izr.atnifty.com/
blog: http://ji1izr.air-nifty.com/
***************************
------------------------------
Message: 8
Date: Mon, 5 May 2008 21:09:35 -0500
From: "Alan" <ve4yz(AT)mts.net>
Subject: [amsat-bb] Re: Trackbox
To: "'renauld halbardier'" <renauld.halbardier(AT)skynet.be>,
<amsat-bb(AT)amsat.org>
Message-ID: <6DB4A93603DE4CD3B0587E1F1692F052(AT)athlon>
Content-Type: text/plain; charset="us-ascii"
Hi Renauld... What specifically is the problem? When you press the binary
switch does it not go from satellite to satellite? Does it loose its
settings, time, keps, frequencies, or other settings?
There is a lithium battery that is switched on at JP13. Did you disconnect
it when you put it into storage 5 years ago? Check the voltages at the
battery. I have 2 of these and they are from the mid 1990's and fortunately
I haven't had to replace the batteries yet.
-----Original Message-----
From: amsat-bb-bounces(AT)AMSAT.Org [mailto:amsat-bb-bounces(AT)AMSAT.Org] On
Behalf Of renauld halbardier
Sent: May 5, 2008 5:05 PM
To: amsat-bb(AT)AMSAT.Org
Subject: [amsat-bb] Trackbox
hello all
my 'old' trackbox (dusty!) ,after 5 years of sleep, doesnt work in stand
alone mode anymore ; terminal mode works perfectly. Ram has been cleared ,
clock adjusted, new keplers loaded ; version is 3.50b.
Any ideas ?
73
renauld on4kvi
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: Mon, 5 May 2008 21:26:11 -0500
From: "Alan" <ve4yz(AT)mts.net>
Subject: [amsat-bb] Re: Trackbox
To: "'renauld halbardier'" <renauld.halbardier(AT)skynet.be>,
<amsat-bb(AT)amsat.org>
Message-ID: <0641E66D341A4E0682CDFF90E5569B97(AT)athlon>
Content-Type: text/plain; charset="us-ascii"
Me again, 3.50b is the most current eprom. You must connect it to an
external 12 VDC even when in standalone mode.
Finally, the binary switch ( one of my TrakBoxes has a rotary and the other
has 2 push buttons for moving up and down the 9 satellites plus "0" for
normal mode ) on mine does not automatically switch satellites when you
switch between "0" and any satellite. It also does not switch back to "0"
terminal mode from any satellite. The first change in switch position
requires a reset. So once I have gone to "1" from "0" and do a reset, I can
then go to any other satellite with just the switch.
If I then go back to "0" I need to again "reset". An ON/OFF is as good as a
"Reset". On the original kit the reset was a momentary ON switch at the
back.
I just checked the schematic and parts list from 1993 and the switch is
referred to as a 16 position BCD switch.
Hope this helps.
-----Original Message-----
From: amsat-bb-bounces(AT)AMSAT.Org [mailto:amsat-bb-bounces(AT)AMSAT.Org] On
Behalf Of renauld halbardier
Sent: May 5, 2008 5:05 PM
To: amsat-bb(AT)AMSAT.Org
Subject: [amsat-bb] Trackbox
hello all
my 'old' trackbox (dusty!) ,after 5 years of sleep, doesnt work in stand
alone mode anymore ; terminal mode works perfectly. Ram has been cleared ,
clock adjusted, new keplers loaded ; version is 3.50b.
Any ideas ?
73
renauld on4kvi
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: Tue, 6 May 2008 02:41:22 -0000
From: "Alan Cresswell" <alancresswell(AT)xtra.co.nz>
Subject: [amsat-bb] Re: TLE lottery
To: <amsat-bb(AT)amsat.org>
Message-ID: <000001c8af22$acffc010$0301010a(AT)Cresswell2>
Content-Type: text/plain; charset="us-ascii"
Hi Jeroen,
Yes, using object H resulted in Delfi being apparently 1 to 2 minutes late
here in ZL this morning. Using a later object would give a better track.
Alan
ZL2BX
-----Original Message-----
From: amsat-bb-bounces(AT)AMSAT.Org [mailto:amsat-bb-bounces(AT)AMSAT.Org] On
Behalf Of Jeroen Vreeken
Sent: Monday, 5 May 2008 23:02
To: amsat-bb(AT)AMSAT.Org
Subject: [amsat-bb] TLE lottery
Hi,
For the last few days I used object H (#32790) for tracking Delfi-C3. It
is also the current object mentioned on the delfi-c3 website.
However the last few passes it seems that it is getting increasingly late.
Object J (#32791) seems to fit much better....
Is anybody else seeing the same?
73,
Jeroen PE1RXQ
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: Tue, 06 May 2008 00:11:37 -0400
From: "Charles Reiche" <reichec(AT)verizon.net>
Subject: [amsat-bb] Delfi-c3 shutting down and rebooting.
To: "amsat" <amsat-bb(AT)amsat.org>, <missioncontrol(AT)delfic3.nl>
Message-ID: <001001c8af2f$47fe9710$0201a8c0(AT)desk>
Content-Type: text/plain; charset="iso-8859-1"
I captured audio of the Delfi-C3 pass this evening around 02:43 UTC on May 6
on 145.930.
I was hearing some odd formations of the data coming from delfi-c3, I was
synced and recieving packets at the time. Shortly after this the satellite
shut off and restarted a few seconds later, sending more data. Again after
about another minute I heard the strange noises, then the bird shut off.... a
few seconds later it came back only to an idle, and once again shut down,
this time for the rest of the pass.
Hope this description and the following links to the audio can help.
http://www.n3crt.net/amsat/delfic3/delfic3_050608_0240Z_reboot_and_idle.mp3
http://www.n3crt.net/amsat/delfic3/delfic3_050608_0240Z_reboot_and_idle.wav
http://www.n3crt.net/amsat/delfic3/delfic3_050608_0240Z.txt
Charles Reiche N3CRT
FN20XW
IC-910h ~80ft 9913 into M squared 2m7 yagi fixed on the horizon and
horizontally polarized.
------------------------------
Message: 12
Date: Tue, 6 May 2008 09:36:09 +0930
From: "Colin Hurst" <cjhurst(AT)bigpond.net.au>
Subject: [amsat-bb] Re: TLE lottery
To: "Jeroen Vreeken" <pe1rxq(AT)amsat.org>, <amsat-bb(AT)amsat.org>
Message-ID: <INEGKIBIIECPIBBDGHLEOEPHDJAA.cjhurst(AT)bigpond.net.au>
Content-Type: text/plain; charset="us-ascii"
Jeroen,
I do agree with your observations.
My observations have Compass appearing before Cute1.7+APDII.
I would suggest Compass is H and Delfi-C3 is J.
But time will tell.
Colin VK5HI.
> -----Original Message-----
> From: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org]On
> Behalf Of Jeroen Vreeken
> Sent: Tuesday, 6 May 2008 8:32 AM
> To: amsat-bb(AT)amsat.org
> Subject: [amsat-bb] TLE lottery
>
>
> Hi,
>
> For the last few days I used object H (#32790) for tracking Delfi-C3. It
> is also the current object mentioned on the delfi-c3 website.
> However the last few passes it seems that it is getting
> increasingly late.
> Object J (#32791) seems to fit much better....
> Is anybody else seeing the same?
>
> 73,
> Jeroen PE1RXQ
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: 13
Date: Tue, 06 May 2008 01:24:17 -0400
From: "Jack E. Davis" <jed000(AT)charter.net>
Subject: [amsat-bb] Re: Trackbox
To: amsat-bb(AT)amsat.org
Message-ID:
<20080506052419.WXHT4495.aarprv04.charter.net(AT)anonymous_ii.charter.ne
t>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 10:26 PM 5/5/2008, you wrote:
>Me again, 3.50b is the most current eprom.
The latest is 3.50d and available from TAPR. The rom image is readily
available
for those who can burn EPROMS.
I still have all the parts for TrakBox (T_B) for anyone needing them.
Jack Davis - WA4EJR ex TAPR TrakBox Manager
After all these years I often wonder how many are still in use.
I believe around 1000 were sold.
CU at the AMSAT booth in Dayton.
>You must connect it to an external 12 VDC even when in standalone mode.
>
>Finally, the binary switch ( one of my TrakBoxes has a rotary and the other
>has 2 push buttons for moving up and down the 9 satellites plus "0" for
>normal mode ) on mine does not automatically switch satellites when you
>switch between "0" and any satellite. It also does not switch back to "0"
>terminal mode from any satellite. The first change in switch position
>requires a reset. So once I have gone to "1" from "0" and do a reset, I can
>then go to any other satellite with just the switch.
>
>If I then go back to "0" I need to again "reset". An ON/OFF is as good as a
>"Reset". On the original kit the reset was a momentary ON switch at the
>back.
>
>I just checked the schematic and parts list from 1993 and the switch is
>referred to as a 16 position BCD switch.
>
>Hope this helps.
>
>
>-----Original Message-----
>From: amsat-bb-bounces(AT)AMSAT.Org [mailto:amsat-bb-bounces(AT)AMSAT.Org]
On
>Behalf Of renauld halbardier
>Sent: May 5, 2008 5:05 PM
>To: amsat-bb(AT)AMSAT.Org
>Subject: [amsat-bb] Trackbox
>
>hello all
>
>my 'old' trackbox (dusty!) ,after 5 years of sleep, doesnt work in stand
>alone mode anymore ; terminal mode works perfectly. Ram has been cleared ,
>clock adjusted, new keplers loaded ; version is 3.50b.
>
>Any ideas ?
>
>73
>
>renauld on4kvi
>_______________________________________________
>Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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: Tue, 06 May 2008 01:25:45 -0400
From: "Jack E. Davis" <jed000(AT)charter.net>
Subject: [amsat-bb] Re: TrakBox
To: amsat-bb(AT)amsat.org
Message-ID:
<20080506052546.WXZU4495.aarprv04.charter.net(AT)anonymous_ii.charter.ne
t>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 06:04 PM 5/5/2008, you wrote:
>hello all
>
>my 'old' trakbox (dusty!) ,after 5 years of sleep, doesnt work in
>stand alone mode anymore ; terminal mode works perfectly. Ram has been
>cleared , clock adjusted, new keplers loaded ; version is 3.50b.
>
>Any ideas ?
>
>73
>
>renauld on4kvi
The first thing I would suggest is to change to 3.50d. TAPR has ROMs and the
image is readily available if you can program EPROMs.
Also check the battery to see if is still alive. If you need parts let me
know as I still have most everything in the kits.
After making these changes let me know your results.
73, Jack - WA4EJR
------------------------------
Message: 15
Date: Tue, 6 May 2008 07:21:45 +0200 (MEST)
From: "Mike Rupprecht" <mail(AT)mike-rupprecht.de>
Subject: [amsat-bb] Re: TLE lottery
To: "Colin Hurst" <cjhurst(AT)bigpond.net.au>, "Jeroen Vreeken"
<pe1rxq(AT)amsat.org>, amsat-bb(AT)amsat.org
Message-ID: <200805060521.m465LjX4028161(AT)post.webmailer.de>
Content-Type: text/plain; charset="ISO-8859-1"
Hi,
I agree Colin, Compass appearing before Cute but we work with 32787 (E) and
32785 for Cute (C) with good results.
73, Mike
DK3WN
Betreff: [amsat-bb] Re: TLE lottery
Gesendet: Di, 06. Mai 2008
Von: Colin Hurst<cjhurst(AT)bigpond.net.au>
> Jeroen,
> I do agree with your observations.
> My observations have Compass appearing before Cute1.7+APDII.
> I would suggest Compass is H and Delfi-C3 is J.
> But time will tell.
> Colin VK5HI.
>
>
> > -----Original Message-----
> > From: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-
bounces(AT)amsat.org]On
> > Behalf Of Jeroen Vreeken
> > Sent: Tuesday, 6 May 2008 8:32 AM
> > To: amsat-bb(AT)amsat.org
> > Subject: [amsat-bb] TLE lottery
> >
> >
> > Hi,
> >
> > For the last few days I used object H (#32790) for tracking Delfi-C3. It
> > is also the current object mentioned on the delfi-c3 website.
> > However the last few passes it seems that it is getting
> > increasingly late.
> > Object J (#32791) seems to fit much better....
> > Is anybody else seeing the same?
> >
> > 73,
> > Jeroen PE1RXQ
> >
> > _______________________________________________
> > Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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
>
--- original Nachricht Ende ----
------------------------------
Message: 16
Date: Mon, 05 May 2008 21:28:36 -0400
From: "Jack E. Davis" <jed000(AT)charter.net>
Subject: [amsat-bb] Re: TrakBox
To: <(AT)charter.net>
Message-ID:
<20080506012839.NNXR4495.aarprv04.charter.net(AT)anonymous_ii.charter.ne
t>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 06:04 PM 5/5/2008, you wrote:
>hello all
>
>my 'old' trakbox (dusty!) ,after 5 years of sleep, doesnt work in
>stand alone mode anymore ; terminal mode works perfectly. Ram has been
>cleared , clock adjusted, new keplers loaded ; version is 3.50b.
>
>Any ideas ?
>
>73
>
>renauld on4kvi
The first thing I would suggest is to change to 3.50d. TAPR has ROMs and the
image is readily available if you can program EPROMs.
Also check the battery to see if is still alive. If you need parts let me
know as I still have most everything in the kits.
After making these changes let me know your results.
73, Jack - WA4EJR
------------------------------
Message: 17
Date: Mon, 05 May 2008 23:01:17 -0400
From: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Subject: [amsat-bb] Re: AO-51 mode L/S QSB
To: amsat-bb(AT)AMSAT.Org
Message-ID: <481F91BD.647.36BE05D(AT)lucleblanc6.videotron.ca>
Content-Type: text/plain; charset=US-ASCII
On 5 May 2008 at 22:03, Piero Baudino wrote:
> Hi all,
>
> just worked AO-51 in mode L/S over EU starting at about 19.45 UTC.
> I can notice a very deep qsb from about S3 (converter noise) to S9+20.
> I can't remember a so deep qsb in the past, 1-2 years ago the sat in
> this mode was with very "stable" signals.
> Is AO-51 not well stabilized ? Any info from command stations ?
>
> My working setup is:
> RTX: Icom IC-910
> converter: DB6NT 2,4 Ghz to 144 Mhz, 0.43 dB NF
> antenna: grid 70x70 cm. oriz. pol.
>
> Best '73 de Piero IZ1ERR
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the author.
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I got the same results here with a BBQ grid very huge fades i switch to a
simple patch element and the fades deepness has been reduced by
about 70% but overall signal has been reduced too.
Will try an helix and it will be interresting to know what kind of antenna the
2.4ghers are using
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 18
Date: Tue, 6 May 2008 13:22:20 +0530
From: "Prathap Kumar" <vu2pop(AT)gmail.com>
Subject: [amsat-bb] Hamsat Greetings
To: <amsat-bb(AT)amsat.org>
Message-ID: <015401c8af4e$1fd96570$1901a8c0(AT)p9c9fa16b80794>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hello All
Thank you all for the greetings and encouraging words about Hamsat VO-52.
I am glad to mention that we have our Hamsat 2 transponder built by one of
our student members and working out plans for the same.
Hopefull for a slightly higher orbit.
There will be a presentation & demo of the new transponder at the
forthcoming seminar & Sat workshop here.
Looking forward to all your support.
Best 73
Pop
VU2POP
Secy Amsat India
------------------------------
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End of AMSAT-BB Digest, Vol 3, Issue 226
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