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CX2SA > SATDIG 10.06.10 19:47l 830 Lines 27555 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: TS2000 on dualband antenna (for sat work) (PA3GUO)
2. Re: TS2000 on dualband antenna (for sat work)
(Nigel Gunn G8IFF/W8IFF)
3. Re: TS2000 on dualband antenna (for sat work) (David Barber)
4. Technical question AO-51 (Robin Theunis)
5. Re: Technical question AO-51 (Andrew Glasbrenner)
6. Can someone help me set up my KW D-700 for ISSAPRS and packet
(pauleakin@xxxxxxx.xxxx
7. Re: Technical question AO-51 (OZ1MY)
8. Re: TS2000 on dualband antenna (for sat work) (PA3GUO)
9. WD9EWK on the satellites last weekend - report
(Patrick STODDARD (WD9EWK/VA7EWK))
10. WD9EWK @ DM34/DM35 boundary, Saturday (12 June)
afternoon/early evening (Patrick STODDARD (WD9EWK/VA7EWK))
11. AO-7 Mode Switch (John Papay)
12. Re: AO-7 Mode Switch (STeve Andre')
13. College night on the Sats? (Michael Wolthuis)
14. Re: College night on the Sats? (Bruce)
15. AO-7 question (Ron Overdrive)
16. Re: AO-7 Mode Switch (Bob- W7LRD)
17. Re: AO-7 question (Samudra Haque)
18. Re: AO-7 question (Samudra Haque)
----------------------------------------------------------------------
Message: 1
Date: Wed, 9 Jun 2010 21:36:23 +0200
From: PA3GUO <pa3guo@xxxxxxx.xx>
Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
To: amsat-bb@xxxxx.xxx
Message-ID: <28639390.1276112183710.JavaMail.root@xxxxxxxx>
Content-Type: text/plain; charset=utf-8
Hi John
Let me try tomorrow and report back, I have never tested this.
Henk, PA3GUO
Has anyone on the list tried using a Kenwood TS2000 on full duplex satellite
operatation using a dualband VHF/UHF antenna and a diplexer? Is it possible
or
is there too much desensitization thru the diplexer to make full duplex work?
73s John AA5JG
------------------------------
Message: 2
Date: Wed, 09 Jun 2010 19:50:47 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
To: amsat-bb@xxxxx.xxx
Message-ID: <4C0FF097.6040301@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
There's probably less desence than using two antennas without
diplexers/filters.
On 09-Jun-10 19:36, PA3GUO wrote:
> Hi John
> Let me try tomorrow and report back, I have never tested this.
> Henk, PA3GUO
>
>
> Has anyone on the list tried using a Kenwood TS2000 on full duplex satellite
> operatation using a dualband VHF/UHF antenna and a diplexer? Is it
possible or
> is there too much desensitization thru the diplexer to make full duplex
work?
>
> 73s John AA5JG
------------------------------
Message: 3
Date: Wed, 9 Jun 2010 21:03:52 +0100
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
To: <amsat-bb@xxxxx.xxx>, <pa3guo@xxxxx.xxx>
Message-ID: <ABF19B311A034DA2910BA2C402087253@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
It works fine.
Used a TS2000E via a MX2000 tri-plexer to a co-linear both u/v and v/u with
no problems. Worked the States and Canada this way via F0-29.
Also used a Create CLP5130 log periodic connected in the same way.
Just keep the TX power as low as is needed to hear your own signal and no
more.
David
G8OQW
********
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of PA3GUO
Sent: 09 June 2010 20:36
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
Hi John
Let me try tomorrow and report back, I have never tested this.
Henk, PA3GUO
Has anyone on the list tried using a Kenwood TS2000 on full duplex satellite
operatation using a dualband VHF/UHF antenna and a diplexer? Is it possible
or
is there too much desensitization thru the diplexer to make full duplex
work?
73s John AA5JG
_______________________________________________
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: 4
Date: Wed, 9 Jun 2010 22:43:12 +0200
From: Robin Theunis <robint91@xxxxx.xxx>
Subject: [amsat-bb] Technical question AO-51
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTin5RM4O1jmDpoKT0Ru5n42nBWqq50hb_MyV7Mxn@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hey fellow sat-hams,
I have a few technical question about AO-51.
1) In V/S mode What is the average output power?
2) What kind of antenna is used on 2.4GHz and 1.3Ghz?
3) What is the sensitivity of the 1.3Ghz receiver?
4) Some where I reeded that AO-51 has an HF receiver? If it true, for
what is the purpose?
This is just a couple of things, I'm thinking about .
I thank very much for any answer on the questions.
73
Robin Theunis
ON8RTH
------------------------------
Message: 5
Date: Wed, 09 Jun 2010 18:43:53 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Technical question AO-51
To: Robin Theunis <robint91@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4C101929.8000901@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Robin Theunis wrote:
> 1) In V/S mode What is the average output power?
>
About 1.5 watts.
> 2) What kind of antenna is used on 2.4GHz and 1.3Ghz?
>
A dual band antenna built by Stan Wood WA4NFY.
http://n4hy.smugmug.com/AMSAT/AO-51-ECHO/Antennas/
> 3) What is the sensitivity of the 1.3Ghz receiver?
>
I don't have these numbers at hand, but it's not super. The L receiver
is actually the same receiver as HF, i.e. an all band, all mode type
synthesized receiver.
> 4) Some where I reeded that AO-51 has an HF receiver? If it true, for
> what is the purpose?
>
We initially wanted to try 28MHz/435MHz PSK31, but with the short
antenna, and extra losses in a last minute hardware change, this mode
does not work very well.
73, Drew KO4MA
AMSAT-NA VP Operations
------------------------------
Message: 6
Date: Wed, 9 Jun 2010 20:32:31 -0800
From: <pauleakin@xxxxxxx.xxx>
Subject: [amsat-bb] Can someone help me set up my KW D-700 for ISSAPRS
and packet
To: <amsat-bb@xxxxx.xxx>
Message-ID: <74EA610D068842A79DD5348B8DFB4561@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Traveling north to upper BC and on into Alaska. Can anyone send me
information on how to use the ISS for APRS positioning and for packet
communications. Also any info on the other other Leo's that I can work with?
I think I need the path and callsigns for APRS and for straight packet work.
I have tracking software to plan on AOS & LOS. Thanks in advance, KJ4G
------------------------------
Message: 7
Date: Thu, 10 Jun 2010 06:25:11 +0200
From: "OZ1MY" <oz1my@xxxxxx.xx>
Subject: [amsat-bb] Re: Technical question AO-51
To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>, "Robin Theunis"
<robint91@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <000601cb0854$ea9b1c20$7b01a8c0@xxxxxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
The sensitivity is -117 dBm for 10 to 12 dB SINAD.
73 OZ1MY
Ib
----- Original Message -----
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
To: "Robin Theunis" <robint91@xxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Thursday, June 10, 2010 12:43 AM
Subject: [amsat-bb] Re: Technical question AO-51
> Robin Theunis wrote:
> > 1) In V/S mode What is the average output power?
> >
> About 1.5 watts.
> > 2) What kind of antenna is used on 2.4GHz and 1.3Ghz?
> >
> A dual band antenna built by Stan Wood WA4NFY.
> http://n4hy.smugmug.com/AMSAT/AO-51-ECHO/Antennas/
> > 3) What is the sensitivity of the 1.3Ghz receiver?
> >
> I don't have these numbers at hand, but it's not super. The L receiver
> is actually the same receiver as HF, i.e. an all band, all mode type
> synthesized receiver.
> > 4) Some where I reeded that AO-51 has an HF receiver? If it true, for
> > what is the purpose?
> >
> We initially wanted to try 28MHz/435MHz PSK31, but with the short
> antenna, and extra losses in a last minute hardware change, this mode
> does not work very well.
>
> 73, Drew KO4MA
> AMSAT-NA VP Operations
> _______________________________________________
> 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: Thu, 10 Jun 2010 7:44:51 +0200
From: PA3GUO <pa3guo@xxxxxxx.xx>
Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
To: amsat-bb@xxxxx.xxx
Message-ID: <11814828.1276148692078.JavaMail.root@xxxxxxxx>
Content-Type: text/plain; charset=utf-8
Thanks David !
My vertical did not pick up AO51 at all, so the experiment
could not be done here. Using my beams all was fine of course.
Funny, I knew this stacked vertical dual band only picks up
signals at low elevation (<10 degrees), at many cubesats (70cm)
and ISS (2 mtrs). But I never experienced only very noisy signals
like this morning from AO51. Nothing wrong with AO51, maybe
with my vertical.
Anyway - was a good trigger to be on AO51 again, made 1 QSO
and listened to many other European stations making contacts.
The antenna set-up: http://www.pa3guo.com/ant_jun_2008.jpg
73, Henk, PA3GUO
> It works fine.
>
> Used a TS2000E via a MX2000 tri-plexer to a co-linear both u/v and v/u with
> no problems. Worked the States and Canada this way via F0-29.
>
> Also used a Create CLP5130 log periodic connected in the same way.
>
> Just keep the TX power as low as is needed to hear your own signal and no
> more.
>
> David
> G8OQW
>
> ********
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of PA3GUO
> Sent: 09 June 2010 20:36
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: TS2000 on dualband antenna (for sat work)
>
> Hi John
> Let me try tomorrow and report back, I have never tested this.
> Henk, PA3GUO
>
>
> Has anyone on the list tried using a Kenwood TS2000 on full duplex satellite
>
> operatation using a dualband VHF/UHF antenna and a diplexer? Is it possible
> or
> is there too much desensitization thru the diplexer to make full duplex
> work?
>
> 73s John AA5JG
>
>
> _______________________________________________
> 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
>
--
Henk, PA3GUO
------------------------------
Message: 9
Date: Wed, 9 Jun 2010 23:19:31 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] WD9EWK on the satellites last weekend - report
To: amsat-bb@xxxxx.xxx
Message-ID: <575727.2402.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Last weekend was a busy weekend. Starting with a 3-hour drive
from Phoenix to Show Low in eastern Arizona on Friday (4 June)
evening, a hamfest in Show Low on Saturday (5 June) followed by
operating from a nearby grid boundary, to a longer drive north
with a 5-hour drive home on Sunday (6 June) - busy, but fun.
Over 858 miles/1381km driven in just over 2 days, operating from
3 locations in 3 different grids.
The first stop for the weekend was at the White Mountain Hamfest
in Show Low. This hamfest has been going on for the past few years,
and this was the first time I have been to it. As far as I could
determine, this was the first AMSAT presence at the hamfest. I
had an AMSAT table there, and worked several passes throughout the
half-day event (2 passes each on AO-7 and SO-50; one pass each
on VO-52, SO-50, and AO-27). Late in the morning, a local Boy
Scout troop visited, and one Scout took the microphone to talk
with a couple of stations on an SO-50 pass. A total of 41 QSOs
went in the log from the demonstrations, including 12 QSOs on an
AO-7 pass to start the morning at 1400 UTC. Lots of AMSAT
merchandise made it into the hands of hams in that area, and -
like with any hamfest - lots of questions about operating and
specifically how I was working the satellites with portable
gear.
After the hamfest and lunch, I found a spot on the DM44xj/DM54aj
grid boundary north of Show Low to operate from. I spent about 5
hours at this site, not far from a small lake but off the main
highways in the area. Lots of passes to work - 3 passes on AO-7,
2 passes on AO-51, and one pass on SO-50. I knew there were a
few who were hoping to hear DM54 on the air, and I was happy to
make the contacts with anyone stopping by to call me. The last
of the 3 AO-7 passes finished up around sunset, leaving enough
light to help me quickly break down my gear for the evening. I
logged 43 QSOs from this grid boundary, a good effort.
At sunrise Sunday (6 June) morning, I left Show Low and headed
toward the Navajo Nation reservation in northeastern Arizona.
I was looking for grid DM56, and possibly a spot on the DM55/DM56
grid boundary that I could park on, for several hours of operating
up there before returning home. I was already in the area for the
hamfest in Show Low, and a few operators asked if I would be able
to visit DM56 to work some passes. I drove north and worked my
way to US-191 north of the I-40 freeway, and unfortunately saw no
safe place to park at the DM55/DM56 grid boundary on that road or
alongside the road. I decided to go a few miles/km further north
to the Navajo town of Chinle, and find someplace to operate there.
Chinle is at the western entrance of the Canyon de Chelly National
Monument, which I visited during longer gaps between passes. I
ended up operating in town, not far from a convenience store and
several fast-food restaurants at a highway junction (grid DM56fd).
Since the afternoon temperatures reached 100F/38C up here, being
near places with air conditioning (besides my truck) were most
appreciated. :-)
At Chinle, I started working passes with the 1620 UTC SO-50 pass.
As that pass finished, VO-52 came up. Not too long after VO-52
went away, the first of two HO-68 passes went by to the east.
After these passes, there was more time between most of the passes,
which I used to get lunch and go into the Canyon de Chelly monument.
In the afternoon, I was able to work a couple of AO-27 passes and
an AO-51 pass before my self-imposed deadline of 2300 UTC (1700 local
time on the Navajo reservation) so I would not get home at or after
midnight. I logged a total of 73 QSOs on 8 passes from DM56 (2 passes
each on SO-50, HO-68, and AO-27; 1 pass each on VO-52 and AO-51),
working stations across the USA including Alaska and Hawaii plus
Canada, Mexico, and Puerto Rico.
After the AO-51 pass, the drive back to Phoenix took almost 5.5 hours.
This was the reason why I did not want to stay up there to work later
passes. I still had to be at my office Monday morning. The drive
home was uneventful, using cruise-control for much of the drive.
I appreciate all the stations that showed up on the Saturday morning
passes during my demonstrations. I had a decent crowd at the start
of the morning for that AO-7 pass, to hear all that activity. Of
course, being able to put QSOs into logs from the DM44/DM54 boundary
and from DM56 was also fun. I have already printed QSL cards for
the 3 locations I operated from over the weekend, wrote out cards
for those who requested cards and others, and some of those cards
will go to the post office tomorrow. If you would like confirmation
of a QSO with WD9EWK from the weekend, just e-mail me directly with
the QSO details. I'll be happy to send you a card.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 10
Date: Wed, 9 Jun 2010 23:33:43 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] WD9EWK @ DM34/DM35 boundary, Saturday (12 June)
afternoon/early evening
To: amsat-bb@xxxxx.xxx
Message-ID: <647040.5680.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I will be in north-central Arizona on Saturday, 12 June, and
should be able to park along the DM34/DM35 grid boundary for
passes in the late afternoon and early evening on 3 satellites:
AO-51, FO-29, SO-50. I should be at the grid boundary around
2300 UTC, in advance of an AO-51 pass at 2336-2350 UTC. I plan
to stay up there until sunset, around 0230 to 0300 UTC, to also
work passes on the other two satellites.
It has been a while since I have been on from DM35, although I
have worked from another part of DM34 (at the DM34xm/DM44am grid
boundary) a couple of times already in 2010. I'm aware that the
upcoming weekend is the ARRL VHF Contest weekend, and I may see
about doing some terrestrial VHF/UHF operating in between passes.
Anyone working WD9EWK on Saturday that wishes to receive a QSL
card only needs to e-mail me with the details of our QSOs. If
you are in the log, I'll send a card.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 11
Date: Thu, 10 Jun 2010 07:50:54 -0400
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] AO-7 Mode Switch
To: amsat-bb@xxxxx.xxx
Message-ID: <453105.39882.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
AO-7 has normally switched modes every other day
except during periods of eclipse when it stays in
Mode B. On June 8th, it was in Mode A as predicted,
however, when it was supposed to switch to Mode B
between 0200 and 0500 on June 9th, the AO-7 log reported
that it was heard in Mode B at 0407z by SP9TTX and then
was reported off on the next pass at 0600z. When it came
back on at 0800z, it was in Mode A rather than Mode B.
Then it switched back to Mode B on the 10th at the normal
time. In other words, it has skipped a day in the switching
schedule.
I didn't see any eclipse event and even if there was, the
satellite would normally come back in Mode B rather than Mode
A. Is there an explanation?
73,
John K8YSE
John Papay
john@xxxxxx.xxx
------------------------------
Message: 12
Date: Thu, 10 Jun 2010 09:18:43 -0400
From: "STeve Andre'" <andres@xxx.xxx>
Subject: [amsat-bb] Re: AO-7 Mode Switch
To: amsat-bb@xxxxx.xxx
Message-ID: <201006100918.43360.andres@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
On Thursday 10 June 2010 07:50:54 John Papay wrote:
> AO-7 has normally switched modes every other day
> except during periods of eclipse when it stays in
> Mode B. On June 8th, it was in Mode A as predicted,
> however, when it was supposed to switch to Mode B
> between 0200 and 0500 on June 9th, the AO-7 log reported
> that it was heard in Mode B at 0407z by SP9TTX and then
> was reported off on the next pass at 0600z. When it came
> back on at 0800z, it was in Mode A rather than Mode B.
> Then it switched back to Mode B on the 10th at the normal
> time. In other words, it has skipped a day in the switching
> schedule.
>
> I didn't see any eclipse event and even if there was, the
> satellite would normally come back in Mode B rather than Mode
> A. Is there an explanation?
>
> 73,
> John K8YSE
>
> John Papay
> john@xxxxxx.xxx
The hardware is not 100% stable. It's been up there a long time, and
while its operational status has been pretty well figured out, it isn't
something that is completely defined. Thats my guess.
I'm simply glad (and amazed) that it works at all.
--STeve Andre'
wb8wsf en82
------------------------------
Message: 13
Date: Thu, 10 Jun 2010 10:19:00 -0400
From: Michael Wolthuis <wolthui3@xxx.xxx>
Subject: [amsat-bb] College night on the Sats?
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <C8366C94.1A8E6%wolthui3@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Can anyone give me more details or where I can find info on College night on
the Sats for June? Did I already miss it or is it tonight? I want to
activate W8MSU (Michigan State University) for several sat passes.
Thanks,
Mike
kb8zgl
------------------------------
Message: 14
Date: Thu, 10 Jun 2010 09:48:33 -0500
From: Bruce <kk5do@xxxxx.xxx>
Subject: [amsat-bb] Re: College night on the Sats?
To: Michael Wolthuis <wolthui3@xxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <4C10FB41.50904@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
you can contact jay, aa4fl. he is the one that sets up college night.
jgarlitz at ufl.edu <http://amsat.org/mailman/listinfo/ans>
73...bruce
On 6/10/2010 9:19 AM, Michael Wolthuis wrote:
> Can anyone give me more details or where I can find info on College night on
> the Sats for June? Did I already miss it or is it tonight? I want to
> activate W8MSU (Michigan State University) for several sat passes.
>
> Thanks,
> Mike
> kb8zgl
>
> _______________________________________________
> 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
>
>
--
Bruce Paige, KK5DO
AMSAT Director Contests and Awards
ARRL Awards Manager (WAS, 5BWAS, VUCC), VE
Houston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT*
Also live streaming MP3 at http://www.amsatnet.com
Podcast at http://www.amsatnet.com/podcast.xml or iTunes
Latest satellite news on the ARRL Audio News
http://www.arrl.org
AMSAT on Twitter http://www.twitter.com/amsat
------------------------------
Message: 15
Date: Thu, 10 Jun 2010 12:46:13 -0400
From: Ron Overdrive <ronoverdrive@xxxxxxxx.xxx>
Subject: [amsat-bb] AO-7 question
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinWUcQ9SmvTAXhoC9RjPwQJeIvVPwfcJLi3eOZh@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
One thing I always noticed is that its recommended to not exceed 5 watts
when operating on AO-7, but I'm not seeing anything about maximum gain to
use. I have an Arrow II handheld yagi and on the 440 side supposedly it has
a 10dbd gain which would give me effectively 50 watts output assuming no
losses. So my question in a nutshell is, what is the maximum recommended
radiated power recommended with this bird?
~73, KC2WQW Ron
------------------------------
Message: 16
Date: Thu, 10 Jun 2010 18:21:09 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-7 Mode Switch
To: John Papay <john@xxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<548035099.2422961276194069732.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
It's a very?old "bucket of bolts", therefore reserves the right to be be a
bit tempermental, for whatever reason.
73 Bob W7LRD
----- Original Message -----
From: "John Papay" <john@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Thursday, June 10, 2010 4:50:54 AM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] ?AO-7 Mode Switch
AO-7 has normally switched modes every other day
except during periods of eclipse when it stays in
Mode B. ?On June 8th, it was in Mode A as predicted,
however, when it was supposed to switch to Mode B
between 0200 and 0500 on June 9th, the AO-7 log reported
that it was heard in Mode B at 0407z by SP9TTX and then
was reported off on the next pass at 0600z. ?When it came
back on at 0800z, it was in Mode A rather than Mode B.
Then it switched back to Mode B on the 10th at the normal
time. ?In other words, it has skipped a day in the switching
schedule.
I didn't see any eclipse event and even if there was, the
satellite would normally come back in Mode B rather than Mode
A. ?Is there an explanation?
73,
John K8YSE
John Papay
john@xxxxxx.xxx
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Message: 17
Date: Thu, 10 Jun 2010 14:31:17 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-7 question
To: Ron Overdrive <ronoverdrive@xxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <4783316114661866601@xxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi does the spec specify the output power as EIRP or not?
If EIRP the antenna gain needs to be part of the equation and
therefore you need to reduce your transmission power to avoid desense
at the receiver on orbit. If the spec does not specify then there
should be a receiver senstivity figure already published which would
be useful in a link budget equation.
Sent on the road... If urgent call (202) 812-3325
On Jun 10, 2010, at 12:46 PM, Ron Overdrive
<ronoverdrive@xxxxxxxx.xxx> wrote:
> One thing I always noticed is that its recommended to not exceed 5
> watts
> when operating on AO-7, but I'm not seeing anything about maximum
> gain to
> use. I have an Arrow II handheld yagi and on the 440 side supposedly
> it has
> a 10dbd gain which would give me effectively 50 watts output
> assuming no
> losses. So my question in a nutshell is, what is the maximum
> recommended
> radiated power recommended with this bird?
>
> ~73, KC2WQW Ron
> _______________________________________________
> 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: 18
Date: Thu, 10 Jun 2010 14:31:17 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-7 question
To: Ron Overdrive <ronoverdrive@xxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <4783316114661866601@xxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi does the spec specify the output power as EIRP or not?
If EIRP the antenna gain needs to be part of the equation and
therefore you need to reduce your transmission power to avoid desense
at the receiver on orbit. If the spec does not specify then there
should be a receiver senstivity figure already published which would
be useful in a link budget equation.
Sent on the road... If urgent call (202) 812-3325
On Jun 10, 2010, at 12:46 PM, Ron Overdrive
<ronoverdrive@xxxxxxxx.xxx> wrote:
> One thing I always noticed is that its recommended to not exceed 5
> watts
> when operating on AO-7, but I'm not seeing anything about maximum
> gain to
> use. I have an Arrow II handheld yagi and on the 440 side supposedly
> it has
> a 10dbd gain which would give me effectively 50 watts output
> assuming no
> losses. So my question in a nutshell is, what is the maximum
> recommended
> radiated power recommended with this bird?
>
> ~73, KC2WQW Ron
> _______________________________________________
> 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!
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End of AMSAT-BB Digest, Vol 5, Issue 261
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