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CX2SA > SATDIG 11.04.08 03:00l 582 Lines 17722 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V3 177
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Sent: 080410/2313Z @:CX2SA.LAV.URY.SA #:59304 [Minas] FBB7.00e $:59304-CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. AO-51 Mode L/U (James Denneny)
2. Re: EggBeater II antennas (Oscar Diez)
3. Re: AO-51 Mode L/U (Gould Smith)
4. Houston AMSAT Net podcast (Bruce)
5. Help required understanding IC910H manual (Graham Shirville)
6. Re: Help required understanding IC910H manual (9w2qc(AT)9w2qc.net)
7. Re: Help required understanding IC910H manual (Tim Tuck)
8. Re: Help required understanding IC910H manual (Charles Reiche)
9. Re: Help required understanding IC910H manual (Bruce)
10. Re: Help reuired understanding IC910H manual (Graham Shirville)
11. Florida AMSAT Net (David J)
12. Re: AO-51 Mode L/U (Dave Aitch)
13. RARSFest help at AMSAT table 4/12/08 (Mark L. Hammond)
----------------------------------------------------------------------
Message: 1
Date: Wed, 9 Apr 2008 12:16:38 -0700
From: "James Denneny" <57JNDenneny(AT)comcast.net>
Subject: [amsat-bb] AO-51 Mode L/U
To: <amsat-bb(AT)amsat.org>
Message-ID: <001801c89a76$3cd57660$b6806320$(AT)net>
Content-Type: text/plain; charset="us-ascii"
I have had no luck uplinking on Mode L. I even followed a suggestion to
increase TX delay to 999 ms and tail time to 100 ms to give the bird extra
time to grab me. However, 10w from my 910H on 23cm with a single twisted
helix 1.2G antenna does not cut the mustard. I also have had very limited
success on the 70cm downlink grabbing the DIR. All in all - a bust.
Jim
K7EG
------------------------------
Message: 2
Date: Wed, 9 Apr 2008 21:34:56 +0200
From: "Oscar Diez" <hbottiki(AT)gmx.de>
Subject: [amsat-bb] Re: EggBeater II antennas
To: <amsat-bb(AT)amsat.org>
Message-ID: <002a01c89a78$cb271bb0$0a01a8c0(AT)homepc>
Content-Type: text/plain; charset="us-ascii"
Hi Jeff,
I would not swap your 6 el. Yagi for any eggbeater (neither the original M2
one nor the homebrewed eggbeater II design).
I've build an Eggbeater II and it was very "nully" due to the many lobes of
the antenna. I had it mounted about 20ft over the ground on the roof top and
connected to a low noise GAsFET preamp. I removed it again after only one
week of operation and was quite disappointed and went back to my homebrew
ground plane.
Furthermore the antenna is only circular overhead and horizontally polarized
towards the horizon. Even the simple 1/4 wave groundplane + preamp gave me a
better reception of 70cm LEO birds at low elevation angles and much less
nulls.
Generally I found vertical polarisation to work better most of the times
with most kind of satellites (although by theory when receiving circular
signals this shouldn't be the case - but you can centrainly confirm that
with your yagi)
If you look for an omnidirectional antenna I would give the parasitic
lindenbald antenna a try as described by Tony AA2TX in the AMSAT proceedings
2006 and 2007. I haven't tried it yet, but I expect it to work even better
than any Eggbeater design (maybe someone ever compared such antenna types
and could report here?)
Best 73,
Oscar DJ0MY
------------------------------
Message: 3
Date: Wed, 9 Apr 2008 19:16:16 -0400
From: "Gould Smith" <gouldsmi(AT)bellsouth.net>
Subject: [amsat-bb] Re: AO-51 Mode L/U
To: "James Denneny" <57JNDenneny(AT)comcast.net>, <amsat-bb(AT)amsat.org>
Message-ID: <BCC1B21F8ADB4B4E83FB7BE9DC58A70F(AT)GouldMainPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hello Jim,
I routinely get the downlink quite well using an 8 element 70 cm yagi, with
a pre-amp at the antenna, fixed elevation, tracking in AZ . The digital
transmission is currently about 500 mW, but you need a good S/N ratio to
decode the data, even if your modem locks on to the clock.
The AMSAT Digital Guide has a very good description from actual experiments
by Mike, N1JEZ on what is need in a 1.2 GHz uplink signal for digital
operation on AO-51. GO-32 also has a 1.2 GHz uplink, but it has also needs
more signal than you are delivering.
The downlink reception is pretty easily and inexpensively corrected. I am
not sure how the increase in TX delay time to a second will help your uplink
as you didn't mention an amplifier needed to switch in.
A good deal of the enjoyment for many of us is the challenge of getting
operations on the satellites and the multiple modes they present. I am sure
the digital guide would be of assistance to you.
73,
Gould, WA4SXM
--- Original Message -----
From: "James Denneny" <57JNDenneny(AT)comcast.net>
To: <amsat-bb(AT)amsat.org>
Sent: Wednesday, April 09, 2008 3:16 PM
Subject: [amsat-bb] AO-51 Mode L/U
>I have had no luck uplinking on Mode L. I even followed a suggestion to
> increase TX delay to 999 ms and tail time to 100 ms to give the bird extra
> time to grab me. However, 10w from my 910H on 23cm with a single twisted
> helix 1.2G antenna does not cut the mustard. I also have had very limited
> success on the 70cm downlink grabbing the DIR. All in all - a bust.
>
>
>
> Jim
>
> K7EG
>
>
>
> _______________________________________________
> 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: 4
Date: Wed, 09 Apr 2008 22:25:35 -0500
From: Bruce <kk5do(AT)arrl.net>
Subject: [amsat-bb] Houston AMSAT Net podcast
To: amsat-bb(AT)amsat.org
Message-ID: <47FD88AF.3040204(AT)arrl.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I think we are ready. The Houston AMSAT Net is now available as a
Podcast. You can subscribe to
http://www.amsatnet.com/podcast.xml
Please let me know off the list if there are any problems. Net #734 and
#735 are available. They will remain online for 4 weeks then roll off.
You can always download and listen with an MP3 player at
http://www.amsatnet.com
or the direct link
http://www.amsatnet.com/audio.html
Thanks to Dale, WD0AKO, for doing the encoding and creating our album art.
I have submitted the link to iTunes but who knows if or when they will
pick it up. And...off our website, it is commercial free.
73...bruce
--
Bruce Paige, KK5DO
AMSAT Director Contests and Awards
ARRL Awards Manager (WAS, 5BWAS, VUCC), VE
Houston AMSAT Net - Wed 0100z on SkyScanner Satellite Radio Network on Galaxy-
25 (AT)97? West,
Transponder 23 (12115 Vert), Symbol Rate: 22425, APID: 1794 (DVB Free To Air)
Also streaming MP3 at http://www.amsatnet.com
Latest satellite news on the ARRL Audio News
http://www.arrl.org
------------------------------
Message: 5
Date: Thu, 10 Apr 2008 08:16:13 -0000
From: "Graham Shirville" <g.shirville(AT)btinternet.com>
Subject: [amsat-bb] Help required understanding IC910H manual
To: <amsat-bb(AT)AMSAT.Org>
Message-ID: <006701c89ae3$248b6cf0$0800a8c0(AT)allgood.local>
Content-Type: text/plain; charset="iso-8859-1"
Hi All,
Simple question about the manual...
On page 19 there is a statement:
"....transmission can only be transmitted on the MAIN band - not on the SUB
band. In the case of satellite operation, the SUB band is used for the
transmission band."
This seems to be contradictory - could anyone tell me what it actually means/
many thanks
Graham G3VZV
------------------------------
Message: 6
Date: Thu, 10 Apr 2008 05:23:58 -0400
From: "9w2qc(AT)9w2qc.net" <9w2qc(AT)9w2qc.net>
Subject: [amsat-bb] Re: Help required understanding IC910H manual
To: g.shirville(AT)btinternet.com
Cc: amsat-bb(AT)amsat.org
Message-ID: <380-22008441092358319(AT)M2W004.mail2web.com>
Content-Type: text/plain; charset=iso-8859-1
Hi Graham,
Nice to hear from you.
This is what I understand about the IC-910H. In non-satellite mode, the
MAIN band is on the top of the LCD and the SUB band is at the bottom. This
means that TX can only occur on the top (MAIN BAND) and RX is possible on
top (MAIN) and on the bottom (SUB).
However, if satellite mode is engaged, this is reverse. Meaning the MAIN
band (where you can TX) is now on the bottom of the LCD display. And the
SUB band (where you can only RX) is now on the top of the LCD display.
Nothing very much different, other than they are the opposite in satellite
and non-satellite mode. One thing that I have learn is that, when using
WISPDDE client + IC-910H, when not in satellite mode, the RX (downlink)
comes on top (as the main band) and the TX (uplink) comes on the bottom (as
sub band). Then when PTT is keyed, you transmit on the downlink instead of
the uplink. This forces me to use the satellite mode even for non-linear
transponder satellites such as AO-51 and GO-32.
Hope this helps. :)
73,
Sion Chow Q. C.,
9W2QC.
Original Message:
-----------------
From: Graham Shirville g.shirville(AT)btinternet.com
Date: Thu, 10 Apr 2008 08:16:13 -0000
To: amsat-bb(AT)amsat.org
Subject: [amsat-bb] Help required understanding IC910H manual
Hi All,
Simple question about the manual...
On page 19 there is a statement:
"....transmission can only be transmitted on the MAIN band - not on the SUB
band. In the case of satellite operation, the SUB band is used for the
transmission band."
This seems to be contradictory - could anyone tell me what it actually
means/
many thanks
Graham G3VZV
_______________________________________________
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
--------------------------------------------------------------------
mail2web.com ? What can On Demand Business Solutions do for you?
http://link.mail2web.com/Business/SharePoint
------------------------------
Message: 7
Date: Thu, 10 Apr 2008 19:30:09 +1000
From: "Tim Tuck" <tim.tuck(AT)penrith.net>
Subject: [amsat-bb] Re: Help required understanding IC910H manual
To: Graham Shirville <g.shirville(AT)btinternet.com>
Cc: amsat-bb(AT)amsat.org
Message-ID: <47FDDE21.1070009(AT)penrith.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Graham Shirville wrote:
> Hi All,
>
> Simple question about the manual...
>
> On page 19 there is a statement:
>
> "....transmission can only be transmitted on the MAIN band - not on the SUB
> band. In the case of satellite operation, the SUB band is used for the
> transmission band."
>
> This seems to be contradictory - could anyone tell me what it actually
means/
>
>
Hi Graham.
It is contradictory and its right!
With the 910 in "normal" mode you can only TX on the main band not the
sub band.
BUT..... when the radio is in "Satellite" mode it will TX using the SUB
band and the main band becomes your RX downlink.
hope that clears things up :)
cheers
Tim
--
VK2XTT :: QF56if :: BMARC :: WIA :: AMSAT
------------------------------
Message: 8
Date: Thu, 10 Apr 2008 06:12:53 -0400
From: "Charles Reiche" <reichec(AT)verizon.net>
Subject: [amsat-bb] Re: Help required understanding IC910H manual
To: <amsat-bb(AT)amsat.org>
Message-ID: <000c01c89af3$71ae2df0$0201a8c0(AT)desk>
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
In non satellite mode... the top freq is the one you are transmitting on.
In Satellite mode, you are transmitting on the bottom freq and recieving on
the top freq.
Yes slightly confusing.
Charles N3CRT
----- Original Message -----
From: "Graham Shirville" <g.shirville(AT)btinternet.com>
To: <amsat-bb(AT)amsat.org>
Sent: Thursday, April 10, 2008 4:16 AM
Subject: [amsat-bb] Help required understanding IC910H manual
> Hi All,
>
> Simple question about the manual...
>
> On page 19 there is a statement:
>
> "....transmission can only be transmitted on the MAIN band - not on the
> SUB
> band. In the case of satellite operation, the SUB band is used for the
> transmission band."
>
> This seems to be contradictory - could anyone tell me what it actually
> means/
>
> many thanks
>
> Graham G3VZV
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Thu, 10 Apr 2008 07:40:09 -0400
From: "Bruce" <snyderb(AT)cox.net>
Subject: [amsat-bb] Re: Help required understanding IC910H manual
To: "Graham Shirville" <g.shirville(AT)btinternet.com>
Cc: amsat-bb(AT)amsat.org
Message-ID: <001401c89aff$a1ac9800$6701a8c0(AT)garage>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Graham
Yes thats how it operates. In non sat mode it only TX's on the main
band. In sat mode it TX's on the sub band. Trick is to have the right data
cable to work in both modes for digital work.
73 Bruce KG4YEV
----- Original Message -----
From: "Graham Shirville" <g.shirville(AT)btinternet.com>
To: <amsat-bb(AT)amsat.org>
Sent: Thursday, April 10, 2008 4:16 AM
Subject: [amsat-bb] Help required understanding IC910H manual
> Hi All,
>
> Simple question about the manual...
>
> On page 19 there is a statement:
>
> "....transmission can only be transmitted on the MAIN band - not on the
> SUB
> band. In the case of satellite operation, the SUB band is used for the
> transmission band."
>
> This seems to be contradictory - could anyone tell me what it actually
> means/
>
> many thanks
>
> Graham G3VZV
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Thu, 10 Apr 2008 11:18:38 -0000
From: "Graham Shirville" <g.shirville(AT)btinternet.com>
Subject: [amsat-bb] Re: Help reuired understanding IC910H manual
To: <amsat-bb(AT)amsat.org>
Message-ID: <001a01c89afc$a06133a0$988252c1(AT)allgood.local>
Content-Type: text/plain; charset="iso-8859-1"
Many thanks to the many who have responded to my question.
I have been able to satisfy the enquirer who is planning the set-up of the
GENSO reference groundstation at ESA-ESTEC - so I am very grateful for your
help!
73
graham G3VZV
------------------------------
Message: 11
Date: Thu, 10 Apr 2008 09:27:03 -0400
From: "David J" <n4csitwo(AT)bellsouth.net>
Subject: [amsat-bb] Florida AMSAT Net
To: "AMSAT-FLORIDA" <AMSAT-FLORIDA(AT)amsat.org>, <amsat-bb(AT)amsat.org>
Message-ID: <000601c89b0e$90f54660$6101a8c0(AT)DHJ>
Content-Type: text/plain; charset="us-ascii"
HQ8R SWAN ISLAND DXPEDITON
SATELLITE COMMUNICATION
Florida AMSAT Net, on the 443.1 MHz N4HHA repeater, On the NI4CE system of
repeaters and over Echolink at KG4YZY-R, node# 4429, on Thursday April 10th
at 19:30 ET.
Following a Preamble and announcements, Bill Dzurilla, NZ5N,
http://www.qrz.com/nz5n will present his adventures to, during and from the
recent Swan Island Dxpedition which ended about March 27.
Web site: http://www.hondurasdx.com/
Please email questions you would like to ask Bill to: David Jordan, AA4KN,
at: aa4kn(AT)amsat.org Dave is only accepting questions sent PRIOR to net
time.
Additional questions will be allowed as time permits.
This will allow reduction of duplicate questions and also allow David to be
heard by everyone via the repeater. Please include your Name and Call Sign.
Credit of the Name and Call Sign will be given over the repeater for those
questions sent to David.
During prior events, many mobile units were unable to present a consistent
r.f. signal into the repeater. Also a more smoothly run net will occur by
reducing the number of "overs" etc.
AMSAT, The Radio Satellite Corporation, web site is:
http://www.amsat.org/amsat-new/index.php
Prepared by Carl Zelich, AA4MI, aa4mi(AT)arrl.net
SENT BY DAVID JORDAN, AA4KN
------------------------------
Message: 12
Date: Thu, 10 Apr 2008 09:02:16 +0100
From: "Dave Aitch" <dave(AT)e1577.b.akamaiedge.net>
Subject: [amsat-bb] Re: AO-51 Mode L/U
To: "James Denneny" <57JNDenneny(AT)comcast.net>
Cc: amsat-bb(AT)amsat.org
Message-ID: <005501c89ae1$31ea0ac0$cd00a8c0(AT)pc5>
Content-Type: text/plain; charset="UTF-8"
Hi Jim,
Have you checked this site ?
http://www.amsat.org/amsat-new/echo/ControlTeam.php
73, Dave.
------------------------------
Message: 13
Date: Thu, 10 Apr 2008 14:00:23 -0400 (EDT)
From: "Mark L. Hammond" <n8mh(AT)embarqmail.com>
Subject: [amsat-bb] RARSFest help at AMSAT table 4/12/08
To: amsat-bb <amsat-bb(AT)amsat.org>
Message-ID:
<250369908.143971207850423900.JavaMail.root(AT)pd02.embarq.synacor.com>
Content-Type: text/plain; charset=utf-8
Hello BBS Readers,
This Saturday, April 12,?is the Raleigh, NC hamfest--RARSFest.??? I have made
all of the arrangements for the space/table/AMSAT goodies, etc. and have a
committment from Barry Baines WD4ASW to assist.? Two others had hoped to help,
but have circumstances which prevent them from helping afterall.
I know that this is short notice, but sometimes that works out best for some
folks!? If you are willing and able to help with the table on Saturday, please
contact me directly off the list at??? n8mh(AT)amsat.org ?? No experience
necessary, on the job training is available at no charge :)?
73
--
Mark?L.?Hammond?[N8MH]
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. 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 3, Issue 177
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