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CX2SA > SATDIG 28.07.14 14:04l 430 Lines 14799 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V9 259
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Sent: 140728/1201Z @:CX2SA.SAL.URY.SA #:8655 [Salto] FBB7.00e $:AMSATBB9259
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Inclusion (satcoms?) (Diane Bruce)
2. Re: FM birds (Diane Bruce)
3. Re: FM birds (Jim Sanford)
4. Re: FM birds (Gus)
5. Re: I want this. I want that. Here comes another FM LEO sat.
(Floyd Rodgers)
6. Re: I want this. I want that. Here comes another FM LEO sat.
(i8cvs)
7. Re: I want this. I want that. Here comes another FM LEO sat.
(Andre)
8. LituanicaSAT-1 status update (Vytenis Buzas)
9. CN88 on CW today (wa7eth@xxxxxxxx.xxxx
10. Ham Radio Now Announces Kickstarter Campaign for 2014
ARRL/TAPR DCC (Digital Communications Conference) in Austin, TX
(Mark Thompson)
----------------------------------------------------------------------
Message: 1
Date: Sun, 27 Jul 2014 08:26:06 -0400
From: Diane Bruce <db@xx.xxx>
To: Phil Karn <karn@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Inclusion (satcoms?)
Message-ID: <20140727122606.GA63991@xxxxx.xx.xxx>
Content-Type: text/plain; charset=us-ascii
On Sat, Jul 26, 2014 at 11:31:51PM -0700, Phil Karn wrote:
> On 07/22/2014 11:05 AM, Robert Bruninga wrote:
>
> > The value of ham radio is providing communications where other systems
> > cannot. And of course, playing with toys just for fun.
>
> I'd flip that around. With the Internet, mobile phones and other
> ubiquitous communications, about the sole reason left for ham radio to
> exist is **education**. And playing with toys just for fun is often
> quite educational as well.
>
> Ham radio provides a hands-on opportunity to teach and learn radio (and
> electronics) technology, and you still can't find anything like it
> anywhere else.
Agreed and this is the primary focus I took when doing up our club
brochure. http://www.db.net/~db/oarc_db_brochure.pdf
Our future is with the young is education. The idea of sitting in
your livingroom talking to people all over the world is something
doable with modern technology (even IRC!) not hamradio. This is the
wrong approach.
>
> Emergency communications is still in there somewhere, but in all honesty
> I now see it as a distant second.
I agree.
>
> And if one is to teach oneself communications and electronics technology
> through ham radio, then ham radio really ought to use something like the
> communications and electronics technologies that the outside world is
> using today, not just those the world was using 40 years ago.
Yes. SSB is a technology the phone company first used and they have
moved on to digital.
>
> --Phil
> _______________________________________________
> 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
-- Diane
--
- db@xxxxxxx.xxx db@xx.xxx http://www.db.net/~db
------------------------------
Message: 2
Date: Sun, 27 Jul 2014 08:36:09 -0400
From: Diane Bruce <db@xx.xxx>
To: Phil Karn <karn@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM birds
Message-ID: <20140727123609.GA66060@xxxxx.xx.xxx>
Content-Type: text/plain; charset=us-ascii
On Sat, Jul 26, 2014 at 10:24:15PM -0700, Phil Karn wrote:
> On 07/22/2014 07:49 AM, wa4hfn@xxxxxxx.xxx wrote:
>
> > SSB/CW birds are the only way to go and if you build it they will
> > come .
>
> Think about what it would be like to tune for Doppler while working SSB
> through a LEO satellite on microwave.
>
> Before you say "computer control", work out the effect of even a tiny
> error in your clock or orbital elements on a high elevation pass and
> remember that SSB has no carrier or pilot tone for closed-loop frequency
> tracking.
>
> Sure, you could have a second receiver track the satellite's beacon. But
> if you're going to all that trouble, why not just have it track a
> single high speed data stream from the satellite, one that's much less
> affected by Doppler in the first place?
Exactly. It makes much more sense to go digital.
The crucial thing is *not* the complexity of the groundstation
it is the lifetime of the satellite.
- 73 Diane VA3DB
--
- db@xxxxxxx.xxx db@xx.xxx http://www.db.net/~db
------------------------------
Message: 3
Date: Sun, 27 Jul 2014 12:57:47 -0400
From: Jim Sanford <wb4gcs@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM birds
Message-ID: <53D52F8B.4060001@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Tracking doppler on 2m and 70cm was hard enough at field day. I like
2GHz and up, but do not want to even think about the doppler.
In the KITSAT days, I used an IC-751 as the receive IF. It has a true
FM detector, with discriminator centered at 0-volts. It steps in 1 or
10 Hz increments, even on FM. I wrote a simple radio-control program
which would take data from InstantTrack, calculate frequency from that,
and set the radio on the expected frequency at the beginning of the
pass. Didn't matter if there was a little error, once AOS happened, the
AFC put the receiver dead-on, and I got good data for the entire pass --
hands free. It was a joy to watch. And that was a simple digital mode.
The other thing that is exciting about going digital, is the idea of
CAT-5 (or fiber) to the box at the antenna, not coax.
Digital will enable so much . . . .
73,
Jim
wb4gcs@xxxxx.xxx
On 7/27/2014 1:24 AM, Phil Karn wrote:
> On 07/22/2014 07:49 AM, wa4hfn@xxxxxxx.xxx wrote:
>
>> SSB/CW birds are the only way to go and if you build it they will
>> come .
> Think about what it would be like to tune for Doppler while working SSB
> through a LEO satellite on microwave.
>
> Before you say "computer control", work out the effect of even a tiny
> error in your clock or orbital elements on a high elevation pass and
> remember that SSB has no carrier or pilot tone for closed-loop frequency
> tracking.
>
> Sure, you could have a second receiver track the satellite's beacon. But
> if you're going to all that trouble, why not just have it track a
> single high speed data stream from the satellite, one that's much less
> affected by Doppler in the first place?
> _______________________________________________
> 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
>
---
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protection is active.
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------------------------------
Message: 4
Date: Sun, 27 Jul 2014 14:12:11 -0400
From: Gus <gus@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM birds
Message-ID: <53D540FB.9040601@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 07/27/2014 12:57 PM, Jim Sanford wrote:
> The other thing that is exciting about going digital, is the idea of
> CAT-5 (or fiber) to the box at the antenna, not coax.
Yep. Rig at the mast-head, fiber (RF noise-immune) to the shack, and a
control head at the operators position. Or a software-only control
head, (but I like twiddling real knobbies and flipping real switches).
Crunch numbers up the pole, at the desk, or both.
Will I live long enough?
--
Gus 8P6SM
The Easternmost Isle
------------------------------
Message: 5
Date: Sun, 27 Jul 2014 13:17:42 -0500
From: Floyd Rodgers <kc5qbc@xxxxxx.xxx>
To: bstguitarist@xxxxx.xxxx Phil Karn <karn@xxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] I want this. I want that. Here comes another
FM LEO sat.
Message-ID: <53D54246.7080702@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I would also vote AO40 was not to complex, it was failed by an accident.
Not wishing to bring up bad memories, but two questions:
Did anything other than the plug incident happen? (In other words, did
any systems fail before the explosion?)
Was there a backup bird built of the same design that just might be
flyable if we could find a ride?
------------------------------
Message: 6
Date: Sun, 27 Jul 2014 20:43:06 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: <kc5qbc@xxxxxx.xxx>, <bstguitarist@xxxxx.xxx>, "Phil Karn"
<karn@xxxx.xxx>
Cc: AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] I want this. I want that. Here comes another
FM LEO sat.
Message-ID: <001701cfa9ca$9c0fc1c0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Floyd Rodgers" <kc5qbc@xxxxxx.xxx>
To: <bstguitarist@xxxxx.xxx>; "Phil Karn" <karn@xxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Sunday, July 27, 2014 8:17 PM
Subject: Re: [amsat-bb] I want this. I want that. Here comes another FM LEO
sat.
> I would also vote AO40 was not to complex,
I agree ! Not to complex to be operated.
> it was failed by an accident.
Someone forgot to remove a red cap from a valv fuel and helium system.
> Not wishing to bring up bad memories, but two questions:
> Did anything other than the plug incident happen? (In other words, did
> any systems fail before the explosion?)
NO !
> Was there a backup bird built of the same design that just might be
> flyable if we could find a ride?
We got for years OSCAR-10 and OSCAR-13 in the Molnyia orbit
very similar to that of AO40 but with lover apogee and different
orbit inclination,
73" de i8CVS Domenico
>
> _______________________________________________
> 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: Sun, 27 Jul 2014 22:14:20 +0200
From: Andre <sats@xxxxxx.xxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] I want this. I want that. Here comes another
FM LEO sat.
Message-ID: <53D55D9C.1070008@xxxxxx.xxxxx.xx>
Content-Type: text/plain; charset=windows-1252
Op 27-07-14 om 20:17 schreef Floyd Rodgers:
> Was there a backup bird built of the same design that just might be
> flyable if we could find a ride?
>
Not a backup for phase 3d but a satelite with simular spaceframe and
capabiletie to get in the same orbit, phase 3e is capable of being
flight test ready in a short time as it was intended to be launched
around 2007 if I'm not mistaken.
it has a simpler IF system but the signals should be just as strong as
ao-40 was.
73 de Andre PE1RDW
------------------------------
Message: 8
Date: Mon, 28 Jul 2014 00:12:10 +0300
From: Vytenis Buzas <vytenis.buzas@xxxxx.xxx>
To: Laurynas Ma?iulis <aviatorius@xxxxx.xxx>
Cc: Rainer Rothe <rotherainer@xxx.xx>, M5AKA@xxxxx.xxxxxxxxxxxxx Satou
<ja0caw@xxxx.xxx.xx.xx>, G3VZV@xxxxx.xxxxxxxxxx@xx.xxx
"amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, Nestor Punales
<kd2akp@xxxxx.xxx>, TLM LituanicaSAT-1 <ly5n@xxx.xx>, ??????? ??????
<r4uab.dmitry@xxxxx.xxx>, Mario Fazio <lu4eou@xxxxx.xxx>, Iji
Yoshitomo <ja6pl@xxx.xxxx.xx>, Roland Zurmely <py4zbz@xxxxx.xxx>,
Kasei Toshio <tkasei@xxxxx.xxx>
Subject: [amsat-bb] LituanicaSAT-1 status update
Message-ID:
<CAJUmU7pBxa8Sb2pPVmxSaRDJESbSL6wDhLksj8jNwe+LKkpM0g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Dear friends, FM transponder is OFF, it's mission is completed, thank you
for all the good responses. Based on this there will be more projects in
the future making benefit for HAM people of the World.
Currently only telemetry packets are to transmit data every 15 seconds.
On-board temperature is rising and the altitude is being lost quickly
therefore some peculiarities due to changing thermal environment can occur.
Would appreciate any of your reports tracking last orbits of LituanicaSAT-1.
Thank you for all of your support!
Vytenis B.
------------------------------
Message: 9
Date: Sun, 27 Jul 2014 16:25:31 -0700
From: "wa7eth@xxxxxxxx.xxxx <wa7eth@xxxxxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] CN88 on CW today
Message-ID:
<1406503531.69872.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I will be on FO-29, Mode CW on the 0048Z (July 28) and 0234Z passes, mode
CW. Looking for some cw contacts.
.
73'...Ed ?WA7ETH
------------------------------
Message: 10
Date: Mon, 28 Jul 2014 00:09:41 -0700
From: Mark Thompson <wb9qzb_groups@xxxxx.xxx>
To: "seatcp@xxxxxx.xxxx <seatcp@xxxxxx.xxx>,
"freetel-codec2@xxxxx.xxxxxxxxxxx.xxxx
<freetel-codec2@xxxxx.xxxxxxxxxxx.xxx>, "rtty@xxxxxxxxxx.xxxx
<rtty@xxxxxxxxxx.xxx>, "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>,
"tlan@xxxxxxxx.xxxx <tlan@xxxxxxxx.xxx>
Cc: Gary Pearce <kn4aqgary@xxxxx.xxx>
Subject: [amsat-bb] Ham Radio Now Announces Kickstarter Campaign for
2014 ARRL/TAPR DCC (Digital Communications Conference) in Austin, TX
Message-ID:
<1406531381.53932.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Ham Radio Now Announces Kickstarter Campaign to Attend & Record Videos?
of 2014 ARRL/TAPR DCC (Digital Communications Conference) in Austin, TX.?
Gary, KN4AQ of ARVN & Ham Radio Now produced high quality video of the
ARRL/TAPR DCCs (Digital Communications Conference)
in 2008 and 2009 (released on DVD), and 2011, 2012 and 2013 (released on
high-definition streaming video).?
The videos covered every talk, including the Saturday banquet "keynote" and?
the Sunday Seminar, usually a four-hour "deep dive" into a single subject.?
The videos have been an invaluable resource for hams who weren't able to
attend the sessions,?
and even for hams who were there in person and wanted a review.?
Gary, KN4AQ is based in North Carolina. Last year, he conducted a successful
Kickstarter campaign?
to raise funds to cover both his expenses to travel to the 2013 ARRL/TAPR
DCC (Digital Communications Conference) in Seattle and?
produce & make available on-line video of the entire DCC including all
sessions.
The year Gary is conducting another Kickstarter campaign this year to cover
his expenses to attend the 2014 DCC in Austin, TX and?record & produce the
entire DCC again.?
Please help TAPR & Ham Radio Now by contributing to Gary's Kickstarter
campaign at the link below:?
https://www.kickstarter.com/projects/860504337/hamradionow-video-of-the-2014-a
rrl-tapr-dcc/pledge/new
More information about the DCC is at: www.tapr.org/dcc
Thanks for contribution to the Ham Radio Now DCC Kickstarter campaign and
look forward to seeing many of you at the DCC.
------------------------------
_______________________________________________
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 9, Issue 259
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