| |
CX2SA > SATDIG 13.10.09 23:35l 984 Lines 33771 Bytes #999 (0) @ WW
BID : AMSATBB4533
Read: GUEST
Subj: AMSAT-BB-digest V4 533
Path: IZ3LSV<IK2XDE<PY1AYH<PY1AYH<CX2SA
Sent: 091013/2126Z @:CX2SA.LAV.URY.SA #:9399 [Minas] FBB7.00e $:AMSATBB4533
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. KLM 2M-14C...waterproof the polarity switch? (David Wing)
2. Re: KLM 2M-14C...waterproof the polarity switch? (Jim Jerzycke)
3. SUMBANDILASAT *update on amateur payload* (Chris Bloy)
4. Re: FM satellite operations again again over Europe
(Samudra Haque)
5. Re: FM satellite operations again again over Europe
(David - KG4ZLB)
6. Re: SUMBANDILASAT *update on amateur payload* (Graham Shirville)
7. Re: KLM 2M-14C...waterproof the polarity switch? (Alan VE4YZ)
8. Re: FM satellite operations again again over Europe
(Tony Langdon)
9. Re: SUMBANDILASAT *update on amateur payload* (Fabiano Moser)
10. Looking for K5GNA Downconverter (Charles Suprin)
11. Re: FM satellite operations again again over Europe
(Samudra Haque N3RDX)
12. Re: PIC rotator control (Andrew Rich)
13. Re: Looking for K5GNA Downconverter (Dave Webb KB1PVH)
----------------------------------------------------------------------
Message: 1
Date: Tue, 13 Oct 2009 12:37:45 -0700
From: "David Wing" <david@xxxxxx.xxx>
Subject: [amsat-bb] KLM 2M-14C...waterproof the polarity switch?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <22BF324E7FA441BF88B9C00ED87B2BA1@xxxxx>
Content-Type: text/plain; charset="us-ascii"
Anyone out there with KLM antennas with the polarity switch care to comment
on whether you have put a housing on the switch to protect it from the
elements? It looks like the relay has silicon around the base but it just
grates me the wrong way to have a circuit board with a power connection and
components exposed to the elements.
Maybe it has not been an issue but I'd care to hear of anyone experiences.
If anyone has built up a housing and have pictures or directions, please
pass them along
73,
David
K6CDW
------------------------------
Message: 2
Date: Tue, 13 Oct 2009 12:54:42 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: KLM 2M-14C...waterproof the polarity switch?
To: amsat-bb@xxxxx.xxxx David Wing <david@xxxxxx.xxx>
Message-ID: <148325.55765.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I'd put a little plastic or Tupperware box over it.
The 70cm version that I have has only been used for Field Day, so it's not
been outside much, but it definitely shows signs of having been damp.
73, Jim KQ6EA
--- On Tue, 10/13/09, David Wing <david@xxxxxx.xxx> wrote:
> From: David Wing <david@xxxxxx.xxx>
> Subject: [amsat-bb] KLM 2M-14C...waterproof the polarity switch?
> To: amsat-bb@xxxxx.xxx
> Date: Tuesday, October 13, 2009, 12:37 PM
> Anyone out there with KLM antennas
> with the polarity switch care to comment
> on whether you have put a housing on the switch to protect
> it from the
> elements?? It looks like the relay has silicon around
> the base but it just
> grates me the wrong way to have a circuit board with a
> power connection and
> components exposed to the elements.
>
>
>
> Maybe it has not been an issue but I'd care to hear of
> anyone experiences.
> If anyone has built up a housing and have pictures or
> directions, please
> pass them along
>
>
>
> 73,
>
> David
>
> K6CDW
>
>
>
>
>
> _______________________________________________
> 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: 3
Date: Tue, 13 Oct 2009 21:00:33 +0100
From: "Chris Bloy" <chris@xxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] SUMBANDILASAT *update on amateur payload*
To: <amsat-bb@xxxxx.xxx>
Message-ID: <004201ca4c3f$d398fd70$7acaf850$@xx.xx>
Content-Type: text/plain; charset="us-ascii"
>From the Amsat SA pages :-
STOP PRESS
The First test of the amateur payload will be carried out on 14 October
during the 21.12 CAT pass. Watch for updates here
Update from Ground Control
13 October 2009
Source : http://www.amsatsa.org.za/
Chris - M0DQO
------------------------------
Message: 4
Date: Tue, 13 Oct 2009 16:30:52 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] Re: FM satellite operations again again over
Europe
To: "Eric Knaps, ON4HF" <eric.knaps@xxxxxxx.xx>
Cc: Gary Lockhart <gary_lockhart33@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID:
<d8c724880910131330m6b366c86ue3d87e150737416f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
on a satellite QSO, is it traditional to say "A, B, C" instead of
"Alfa Bravo Charlie" for brevity when referring to call signs and grid
locators ?
On Tue, Oct 13, 2009 at 2:24 PM, Eric Knaps, ON4HF
<eric.knaps@xxxxxxx.xx> wrote:
> Hello all,
> I found these nice rules from VK3JED:
>
> ?1. First and foremost is to listen before and while (if possible)
> ? ? transmitting, to ensure your transmissions don't drown out a weaker
> ? ? station who may be on the edge of a pass or running QRP. Satellites
> ? ? should be an alligator free zone. It is strongly recommended that you
> ? ? set your station up so you can monitor the downlink while
> ? ? transmitting, so you can hear how well you are accessing the satellite
> ? ? and whether you accidentally clobbered someone else. Similarly, if you
> ? ? can't hear the transponder, don't transmit. Do something else more
> ? ? productive, such as realign your receiving antenna to improve
> ? ? reception.
> ?2. Be brief. Because the traffic levels can be quite high, contest style
> ? ? (callsign/signal report/next station) operation is the most
> ? ? appropriate for most situations. Many stations also exchange QTH and
> ? ? first names, which is OK if time permits. If transponder activity is
> ? ? low, you can have a brief chat, but the opportunities for this are
> ? ? becoming rare now.
> ?3. Take turns. If you've just worked a handful of stations, be polite and
> ? ? hand the transponder over to someone else so they can work a few.
> ? ? There may be an opportunity to call back in later during the pass and
> ? ? work some different stations as the satellite passes over different
> ? ? areas, and others will appreciate your courtesy.
> ?4. When calling, a simple announcement (e.g. "This is VK3JED listening
> ? ? SUNSAT" or even "VK3JED listening") will suffice, like it does on a
> ? ? terrestrial repeater. Anyone within transponder range will hear your
> ? ? call. A short CQ call ("CQ SUNSAT, this is VK3JED") is OK too. Long CQ
> ? ? calls waste transponder time and frustrate everyone listening. Save
> ? ? the long CQs for HF, where they're appropriate. Only call CQ when
> ? ? there's a distinct lack of activity, such as at the very start of a
> ? ? pass and sometimes late in the pass after everyone else has finished.
> ? ? A well placed CQ call late in a pass might alert someone ahead of the
> ? ? satellite that a pass has just commenced over their QTH.
> ?5. Wait your turn. If a QSO is in progress, wait until it finishes before
> ? ? putting in your call. Butting in too soon is rude and wastes precious
> ? ? transponder time as the stations involved in the QSO have to repeat
> ? ? themselves due to your QRM.
> ?6. Don't tune up! Believe it or not, there are stations who test their
> ? ? satellite access by dropping a carrier over the top of everyone and
> ? ? perhaps announcing "Hello hello". Simply putting out a call at the
> ? ? appropriate time will provide all the signal checks you need (and get
> ? ? you a worthwhile contact! :) ), without annoying everyone else on the
> ? ? transponder. If you're really that doubtful about your equipment,
> ? ? perhaps connect your dummy load, test in the shack and try again
> ? ? another day, rather than disrupting everyone else. If you just want to
> ? ? hear your voice, well a tape recorder or a pair of walkie talkies will
> ? ? do just as well...
> ?7. Reward good operation. If you're answering a call, why not reward the
> ? ? good operators and put the alligators last on your list of priorities.
> ? ? If all satellite users favour good operators, perhaps everyone will
> ? ? learn that good ops have the highest QSO rates and earn the most
> ? ? satellite awards. :-) Peer pressure is a powerful motivating force, as
> ? ? any teenager will know (but probably not admit to! :-) ).
> ?8. Use the minimum power necessary. While power levels are not critical
> ? ? on FM satellites (unlike linear transponders where an excessively
> ? ? strong signal can affect other QSOs on the transponder), using the
> ? ? minimum power necessary allows you to easier tell if you're 'doubling'
> ? ? with someone else. For the South African SUNSAT satellite, you
> ? ? shouldn't need more than 5 watts into a basic (1/2 wave handheld or
> ? ? turnstile) antenna, perhaps a bit more if the antenna is setup for
> ? ? terrestrial operation, to overcome radiation pattern limitations. As
> ? ? an example of good operation, recently one station who had multiple
> ? ? beams wound his power back to 20 mW. The signal into the bird was full
> ? ? quieting, but it was still possible to tell if someone else was
> ? ? underneath his signal. If he had run 100W, he couldn't have known if
> ? ? he'd stepped on anyone else, due to the capture effect of FM.
>
> If everyone follows these simple guidelines (which are basically common
> sense and courtesy), then FM satellite operation can be enjoyable for
> everyone, regardless of whether you run a sophisticated satellite station
> or a couple of handhelds from the back yard. FM satellite transponders are
> like FM repeaters, only more extreme. On the positive side, they can enable
> minimally equipped stations thousands of kilometres apart to communicate
> with ease. On the other hand, the worst aspects of repeaters can be
> experienced as well, such as congestion, doubling and even the odd idiot
> dropping carriers! (I don't know how the idiots manage to always have a
> very strong signal, even when the repeater is 800 km off the ground!). The
> operators themselves (that's YOU!) have the power to determine what sort of
> experience FM satellite operation will be in the future.
>
> 73,
> ON4HF.
>
> Eric Knaps
> Waterstraat 30
> B-3980 Tessenderlo
> Belgium
>
> Tel. +32472985876 (mobile)
>
> http://www.on4hf.be
>
>
>
> Gary Lockhart schreef:
>> Thank you sharing some good operating practices that would make satellite
ops in the US more enjoyable and equitable as well.
>> 73, Gary AB3ID
>>
>>
******************************************************************************
*******
>> Hi all in Europe,
>> It is obviously about time to repeate a few
>> good points about operating via the FM repeater
>> satellites.
>>
>> 1. Do not transmit if you can not hear it
>>
>> 2. When the satellite is busy - limit the number of QSO's to ONE
>>
>> 3. Do not call over an ongoing QSO
>>
>> 4. A valid QSO just needs the call and the report
>>
>> 5. Give way to weak stations like /p and /m
>>
>> 6. Allow DX-peditions to make as many QSO's as there are callers
>>
>> That was the short version :-)
>>
>> I have a long version in English, Italian, Russian, Spanish and French.
>> I can send it to you if you want it. Could use a few other languages
>> like Greek, Polish and others.
>> It would be nice if you can get it in your national journals.
>>
>> And please no flames !
>>
>> 73 OZ1MY
>> Ib
>>
******************************************************************************
********
>>
>>
>> ------------------------------
>>
>>
>> __________________________________________________
>> Do You Yahoo!?
>> Tired of spam? ?Yahoo! Mail has the best spam protection around
>> http://mail.yahoo.com
>> _______________________________________________
>> 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: 5
Date: Tue, 13 Oct 2009 16:53:16 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: FM satellite operations again again over
Europe
To: amsat-bb@xxxxx.xxx
Message-ID: <4AD4E8BC.9080909@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Perhaps these could be translated into Spanish!
David
KG4ZLB
Eric Knaps, ON4HF wrote:
> Hello all,
> I found these nice rules from VK3JED:
>
> 1. First and foremost is to listen before and while (if possible)
> transmitting, to ensure your transmissions don't drown out a weaker
> station who may be on the edge of a pass or running QRP. Satellites
> should be an alligator free zone. It is strongly recommended that you
> set your station up so you can monitor the downlink while
> transmitting, so you can hear how well you are accessing the satellite
> and whether you accidentally clobbered someone else. Similarly, if you
> can't hear the transponder, don't transmit. Do something else more
> productive, such as realign your receiving antenna to improve
> reception.
> 2. Be brief. Because the traffic levels can be quite high, contest style
> (callsign/signal report/next station) operation is the most
> appropriate for most situations. Many stations also exchange QTH and
> first names, which is OK if time permits. If transponder activity is
> low, you can have a brief chat, but the opportunities for this are
> becoming rare now.
> 3. Take turns. If you've just worked a handful of stations, be polite and
> hand the transponder over to someone else so they can work a few.
> There may be an opportunity to call back in later during the pass and
> work some different stations as the satellite passes over different
> areas, and others will appreciate your courtesy.
> 4. When calling, a simple announcement (e.g. "This is VK3JED listening
> SUNSAT" or even "VK3JED listening") will suffice, like it does on a
> terrestrial repeater. Anyone within transponder range will hear your
> call. A short CQ call ("CQ SUNSAT, this is VK3JED") is OK too. Long CQ
> calls waste transponder time and frustrate everyone listening. Save
> the long CQs for HF, where they're appropriate. Only call CQ when
> there's a distinct lack of activity, such as at the very start of a
> pass and sometimes late in the pass after everyone else has finished.
> A well placed CQ call late in a pass might alert someone ahead of the
> satellite that a pass has just commenced over their QTH.
> 5. Wait your turn. If a QSO is in progress, wait until it finishes before
> putting in your call. Butting in too soon is rude and wastes precious
> transponder time as the stations involved in the QSO have to repeat
> themselves due to your QRM.
> 6. Don't tune up! Believe it or not, there are stations who test their
> satellite access by dropping a carrier over the top of everyone and
> perhaps announcing "Hello hello". Simply putting out a call at the
> appropriate time will provide all the signal checks you need (and get
> you a worthwhile contact! :) ), without annoying everyone else on the
> transponder. If you're really that doubtful about your equipment,
> perhaps connect your dummy load, test in the shack and try again
> another day, rather than disrupting everyone else. If you just want to
> hear your voice, well a tape recorder or a pair of walkie talkies will
> do just as well...
> 7. Reward good operation. If you're answering a call, why not reward the
> good operators and put the alligators last on your list of priorities.
> If all satellite users favour good operators, perhaps everyone will
> learn that good ops have the highest QSO rates and earn the most
> satellite awards. :-) Peer pressure is a powerful motivating force, as
> any teenager will know (but probably not admit to! :-) ).
> 8. Use the minimum power necessary. While power levels are not critical
> on FM satellites (unlike linear transponders where an excessively
> strong signal can affect other QSOs on the transponder), using the
> minimum power necessary allows you to easier tell if you're 'doubling'
> with someone else. For the South African SUNSAT satellite, you
> shouldn't need more than 5 watts into a basic (1/2 wave handheld or
> turnstile) antenna, perhaps a bit more if the antenna is setup for
> terrestrial operation, to overcome radiation pattern limitations. As
> an example of good operation, recently one station who had multiple
> beams wound his power back to 20 mW. The signal into the bird was full
> quieting, but it was still possible to tell if someone else was
> underneath his signal. If he had run 100W, he couldn't have known if
> he'd stepped on anyone else, due to the capture effect of FM.
>
> If everyone follows these simple guidelines (which are basically common
> sense and courtesy), then FM satellite operation can be enjoyable for
> everyone, regardless of whether you run a sophisticated satellite station
> or a couple of handhelds from the back yard. FM satellite transponders are
> like FM repeaters, only more extreme. On the positive side, they can enable
> minimally equipped stations thousands of kilometres apart to communicate
> with ease. On the other hand, the worst aspects of repeaters can be
> experienced as well, such as congestion, doubling and even the odd idiot
> dropping carriers! (I don't know how the idiots manage to always have a
> very strong signal, even when the repeater is 800 km off the ground!). The
> operators themselves (that's YOU!) have the power to determine what sort of
> experience FM satellite operation will be in the future.
>
> 73,
> ON4HF.
>
> Eric Knaps
> Waterstraat 30
> B-3980 Tessenderlo
> Belgium
>
> Tel. +32472985876 (mobile)
>
> http://www.on4hf.be
>
>
>
> Gary Lockhart schreef:
>
> _______________________________________________
> 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: Wed, 14 Oct 2009 21:56:29 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: SUMBANDILASAT *update on amateur payload*
To: "Chris Bloy" <chris@xxxxxxxxxxx.xx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <C1EBB53E9F144A8CB5328149593C752A@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I understand that there is a possibility that the 145.880MHz TX will be kept
on for one complete orbit. If this is correct then we could hear the
satellite in Europe from approx 19:20 UTC depending on your exact location
73
Graham
G3VZV
----- Original Message -----
From: "Chris Bloy" <chris@xxxxxxxxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Tuesday, October 13, 2009 9:00 PM
Subject: [amsat-bb] SUMBANDILASAT *update on amateur payload*
> >From the Amsat SA pages :-
>
>
>
> STOP PRESS
>
> The First test of the amateur payload will be carried out on 14 October
> during the 21.12 CAT pass. Watch for updates here
>
>
>
> Update from Ground Control
>
> 13 October 2009
>
>
>
> Source : http://www.amsatsa.org.za/
>
>
>
> Chris - M0DQO
>
> _______________________________________________
> 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: Tue, 13 Oct 2009 15:57:50 -0500
From: "Alan VE4YZ" <ve4yz@xxx.xxx>
Subject: [amsat-bb] Re: KLM 2M-14C...waterproof the polarity switch?
To: "'David Wing'" <david@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <1C9FA4291AD349F4A051EB51DEE3EDF4@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Domenico I8CVS did it and I copied his method.
Pictures here mine:
http://picasaweb.google.com/ve4yz.alan/I8CVSWXProofKLM#
73, Alan VE4YZ
EN19kv
AMSAT LM 2352
http://www.wincube.ca
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx
> [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David Wing
> Sent: October 13, 2009 2:38 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] KLM 2M-14C...waterproof the polarity switch?
>
> Anyone out there with KLM antennas with the polarity switch
> care to comment on whether you have put a housing on the
> switch to protect it from the elements? It looks like the
> relay has silicon around the base but it just grates me the
> wrong way to have a circuit board with a power connection and
> components exposed to the elements.
>
>
>
> Maybe it has not been an issue but I'd care to hear of anyone
> experiences.
> If anyone has built up a housing and have pictures or
> directions, please pass them along
>
>
>
> 73,
>
> David
>
> K6CDW
>
>
>
>
>
> _______________________________________________
> 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, 14 Oct 2009 07:59:20 +1100
From: Tony Langdon <vk3jed@xxxxx.xxx>
Subject: [amsat-bb] Re: FM satellite operations again again over
Europe
To: Samudra Haque <samudra.haque@xxxxx.xxx>, "Eric Knaps, ON4HF"
<eric.knaps@xxxxxxx.xx>
Cc: Gary Lockhart <gary_lockhart33@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <4ad4ea34.0710660a.2d96.16bd@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 07:30 AM 10/14/2009, Samudra Haque wrote:
>on a satellite QSO, is it traditional to say "A, B, C" instead of
>"Alfa Bravo Charlie" for brevity when referring to call signs and grid
>locators ?
That can backfire and waste time, due to people not understanding the
letters. For example, my callsign under adverse conditions could be
mis heard as (heard most of the following on terrestrial repeaters or
IRLP/Echolink, let alone on the birds!):
VK3JEB
VK3JD
VK3JB
VK3JEV
VK3JV
And the list goes on.... ;) The overhead in asking for clarification
or getting a correction outweighs the overhead of using phonetics in
most cases. Once callsigns are confirmed, you can drop the phonetics
(though usually by then, the QSO is over, so someone else can have a
go ;) ). Phonetics are also more likely to survive brief bursts of
QRM or brief fades.
73 de VK3JED / VK3IRL
http://vkradio.com
------------------------------
Message: 9
Date: Tue, 13 Oct 2009 22:02:16 +0100
From: "Fabiano Moser" <fabianomoser@xxxxx.xxx>
Subject: [amsat-bb] Re: SUMBANDILASAT *update on amateur payload*
To: <amsat-bb@xxxxx.xxx>
Message-ID: <844DF118D44440FD85DCDA7C7F0F9738@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
How to ADD a new keplerian file using NOVA?
I copy the kepler data to a empty txt file, but got alert "does not appear
to be a valid Leplerian element file."
I have this:
SUMBA
1 35870U 09049F 09285.11645204 .00000399 00000-0 20021-4 0 713
2 35870 097.3690 334.7270 0010989 202.0614 210.2918 15.22806343 3715
What is the format accept for NOVA?
Thank you!
73
Fabiano Moser CR7/PY5RX
ARISS-PORTUGAL (Amateur Radio on the International Space Station)
Representative at Teleconference and Portugal Telebridge Coordinator.
AMRAD/AMSAT-CT
http://www.amrad.pt/ariss.php
"There is no great talent without great will. (Honor? de Balzac)"
----- Original Message -----
From: "Chris Bloy" <chris@xxxxxxxxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Tuesday, October 13, 2009 9:00 PM
Subject: [amsat-bb] SUMBANDILASAT *update on amateur payload*
> >From the Amsat SA pages :-
>
>
>
> STOP PRESS
>
> The First test of the amateur payload will be carried out on 14 October
> during the 21.12 CAT pass. Watch for updates here
>
>
>
> Update from Ground Control
>
> 13 October 2009
>
>
>
> Source : http://www.amsatsa.org.za/
>
>
>
> Chris - M0DQO
>
> _______________________________________________
> 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: 10
Date: Tue, 13 Oct 2009 17:02:38 -0400
From: Charles Suprin <hamaa1vs@xxxxx.xxx>
Subject: [amsat-bb] Looking for K5GNA Downconverter
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<e6d28deb0910131402s7a465e63g4bd41e1635afdcc2@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello,
Some offer to sell these here. I thought I would offer to buy one. I am
looking for the handheld version with the reflector if anyone has decided
they have had enough.
Charles
AA1VS
------------------------------
Message: 11
Date: Tue, 13 Oct 2009 17:10:43 -0400
From: Samudra Haque N3RDX <n3rdx@xxxxx.xxx>
Subject: [amsat-bb] Re: FM satellite operations again again over
Europe
To: Tony Langdon <vk3jed@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx Gary Lockhart <gary_lockhart33@xxxxx.xxx>,
"Eric Knaps, ON4HF" <eric.knaps@xxxxxxx.xx>
Message-ID:
<d8c724880910131410p3989c2d8v44141c37719e0182@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I asked as I am still puzzled why in the US on local FM nets hams just
use "n,3,r,d,x" instead of "november three romeo david x-ray".
On Tue, Oct 13, 2009 at 4:59 PM, Tony Langdon <vk3jed@xxxxx.xxx> wrote:
> At 07:30 AM 10/14/2009, Samudra Haque wrote:
>>
>> on a satellite QSO, is it traditional to say "A, B, C" instead of
>> "Alfa Bravo Charlie" for brevity when referring to call signs and grid
>> locators ?
>
> That can backfire and waste time, due to people not understanding the
> letters. ?For example, my callsign under adverse conditions could be mis
> heard as (heard most of the following on terrestrial repeaters or
> IRLP/Echolink, let alone on the birds!):
>
> VK3JEB
> VK3JD
> VK3JB
> VK3JEV
> VK3JV
>
> And the list goes on.... ;) ?The overhead in asking for clarification or
> getting a correction outweighs the overhead of using phonetics in most
> cases. ?Once callsigns are confirmed, you can drop the phonetics (though
> usually by then, the QSO is over, so someone else can have a go ;) ).
> ?Phonetics are also more likely to survive brief bursts of QRM or brief
> fades.
>
> 73 de VK3JED / VK3IRL
> http://vkradio.com
>
>
------------------------------
Message: 12
Date: Wed, 14 Oct 2009 07:20:56 +1000
From: "Andrew Rich" <vk4tec@xxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: PIC rotator control
To: "Alan VE4YZ" <ve4yz@xxx.xxx>, "'Marc Vermeersch'"
<amvm@xxxxxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <B53782D913874481979F39CB50F1A9D5@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thanks
Yes a small 10 inch laptop could do the work, predict would be used and
frequent kep updates
The laptop would also make decisions like
If two sats were up, what is the priority
It is a good project because it covers off
1. Mechanical
2. Programming PERL and ASM (PIC)
3. Installing and maintaining sofware essential to the function
----- Original Message -----
From: "Alan VE4YZ" <ve4yz@xxx.xxx>
To: "'Marc Vermeersch'" <amvm@xxxxxx.xx>; "'Andrew Rich'"
<vk4tec@xxxxxxxxxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Wednesday, October 14, 2009 1:35 AM
Subject: RE: [amsat-bb] Re: PIC rotator control
> Marc, Andrew and the group...
>
> It has always struck me as being odd that we use a PC to run a PC(PIC
> based
> tracker box), to run a rotator control box, to run a rotator. Sure it
> works
> but the absurdity of this really hits home when you disassemble your shack
> to take it all out for Field Day or an EmComm exercise. I don't! I leave
> the PC and LVBtracker at home and take my good old 1990's preprogrammed
> PIC
> based TrakBox that does the radio and rotators.
>
> http://www.tapr.org/kits_trakbox.html
>
> http://picasaweb.google.com/ve4yz.alan/TrakboxRebuild2004#
>
> As I read you comments you are both querying the rotator controller, not
> the
> rotators, to find out where the AL and EL are.
>
> With the power of today's inexpensive netbooks or the OLPC is there not a
> solution where the "embedded system is the netbook"? Then, all that would
> be required between the PC and the rotator is a black box with relays to
> power the rotators and a small A/D interface to take the data from the
> pots
> and pass it onto the PC? A black box easily assembled by most hams. If
> open source, then others can do whatever is necessary create mods for
> various rotator systems such as pulse counting for stepper motors instead
> of
> A/D etc
>
> My 2 cents.... Alan
>
>
>
>> -----Original Message-----
>> From: amsat-bb-bounces@xxxxx.xxx
>> [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Marc Vermeersch
>> Sent: October 13, 2009 6:45 AM
>> To: 'Andrew Rich'; amsat-bb@xxxxx.xxx
>> Subject: [amsat-bb] Re: PIC rotator control
>>
>> Hi Andrew,
>>
>> I have a PIC based solution currently in the prototype stage.
>> It uses a
>> PIC18F4455 and drives a Yeasu AZ/EL rotor without the Yeasy
>> control box.
>>
>> The PC sends information to the PIC (RequestedAZ,RequestedEL)
>> and the PIC sends back status information to the PC
>> (RequestedAZ,RequestedEL,CurrentAZ,CurrentEL,Status).
>>
>> Everything is done by the PIC:
>> - Control of the rotor motors based on either
>> move-every-n-seconds or move-when-error-angle-is-greater-than-n
>> - Measurement of the actual AZ/EL with 10-bit resolution
>> - Parking when no signal has been coming from the PC in x
>> seconds -or- an explicit park command is received
>> - Stall protection
>> - Some horizon protection: EL cannot go below x when AZ is y
>> to avoid pointing into my neighbors' bedroom.
>> - Over the top rotor control (under development)
>> - ...
>>
>> I'm using a PIC18F4455 and it is very well capable of doing
>> all that and more. I have chosen this path for several reasons:
>> - Eventually I want to run a tracking algorithm in the PIC too
>> - To make the control loop shorter
>> - To avoid dependence on the PC part specifically on safety
>> related aspects like stall control and horizon protection.
>> - To explore the capabilities of the PIC18
>> - (Because it's my job to do embedded HW/SW)
>>
>> BR,
>> --
>> /\/\arc
>>
>> > -----Original Message-----
>> > From: amsat-bb-bounces@xxxxx.xxx
>> [mailto:amsat-bb-bounces@xxxxx.xxxx
>> > On Behalf Of Andrew Rich
>> > Sent: dinsdag 13 oktober 2009 12:22
>> > To: amsat-bb@xxxxx.xxx
>> > Subject: [amsat-bb] PIC rotator control
>> >
>> > Hello
>> >
>> > I am re-visting a rotator controller.
>> >
>> > I am curious, should I push the processing of the "compare
>> and make a
>> > decision" onto the PIC, or pull that function back into the PC ?
>> >
>> > PC is LINUX
>> >
>> > I/O is serial
>> >
>> > PIC is 16F877
>> >
>> > Andrew VK4TEC
>> >
>> > _______________________________________________
>> > 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
>>
>
------------------------------------------------------------------------------
--
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.421 / Virus Database: 270.14.12/2431 - Release Date: 10/12/09
13:01:00
------------------------------
Message: 13
Date: Tue, 13 Oct 2009 21:22:26 +0000
From: "Dave Webb KB1PVH" <kb1pvh@xxxxx.xxx>
Subject: [amsat-bb] Re: Looking for K5GNA Downconverter
To: "Charles Suprin" <hamaa1vs@xxxxx.xxx>, amsat-bb-bounces@xxxxx.xxxx
"AMSAT BB" <amsat-bb@xxxxx.xxx>
Message-ID:
<1124996832-1255468939-cardhu_decombobulator_blackberry.rim.net-20547900-@xxxx
xx.xxxx.xxxx.xx.xxxxxxxxxx>
Content-Type: text/plain
I am looking also.
Dave KB1PVH
Sent from my Verizon Wireless BlackBerry
-----Original Message-----
From: Charles Suprin <hamaa1vs@xxxxx.xxx>
Date: Tue, 13 Oct 2009 17:02:38
To: AMSAT-BB<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Looking for K5GNA Downconverter
Hello,
Some offer to sell these here. I thought I would offer to buy one. I am
looking for the handheld version with the reflector if anyone has decided
they have had enough.
Charles
AA1VS
_______________________________________________
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 4, Issue 533
****************************************
Read previous mail | Read next mail
| |
