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CX2SA > SATDIG 04.06.09 02:54l 592 Lines 19523 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V4 257
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Today's Topics:
1. need 3SK121Y or similar for icom AG-25 (Raul Romero)
2. Re: AMSAT-India VO-52 Award (Prathap Kumar)
3. Re: AMSAT-India VO-52 Award (Prathap Kumar)
4. Full Duplex vs Cross Band - definitions (jrivett@xxxxxxx.xxxx
5. 1200 mhz amp PTT (Jeff KB2M)
6. Re: 1200 mhz amp PTT (Andrew Glasbrenner)
7. AO-7 Milliwatt Report (n3tl@xxxxxxxxx.xxxx
8. LabJack problem (Steve kb9ups)
9. N3TL (Peter)
10. Re: AO-7 Milliwatt Report (Bruce Robertson)
11. Re: AO-7 Milliwatt Report (n3tl@xxxxxxxxx.xxxx
12. Re: N3TL (n3tl@xxxxxxxxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Wed, 3 Jun 2009 00:38:35 -0400
From: "Raul Romero" <ce3soc@xxxxx.xxx>
Subject: [amsat-bb] need 3SK121Y or similar for icom AG-25
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <AAE6C8A57A0840B599F7D26C51647109@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
need 3sk121y any have unit sold
need 2 unit in my country not have
tnx
Raul
CA3SOC
------------------------------
Message: 2
Date: Wed, 3 Jun 2009 13:45:49 +0530
From: "Prathap Kumar" <vu2pop@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-India VO-52 Award
To: <n3tl@xxxxxxxxx.xxx>, <AMSAT-BB@xxxxx.xxx>
Message-ID: <C20DE483A92F45B9B05F14A411A93E1A@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Tim
You are welcome.
Glad you liked the VO-52 Award
We too are happy.
Best 73
Pop
VU2POP
Amsat India
Dir Technical
----- Original Message -----
From: <n3tl@xxxxxxxxx.xxx>
To: <AMSAT-BB@xxxxx.xxx>
Sent: Monday, June 01, 2009 10:42 PM
Subject: [amsat-bb] AMSAT-India VO-52 Award
> Hey everyone,
>
> My VO-52 Award arrived in today's mail, and it's very, very nice. It's
> printed on a very heavy stock and is very attractive. I look forward to
> getting it in a frame and on display asap.
>
> My thanks to everyone at AMSAT-India for their efforts to make the award
> available, and for providing great operating via VO-52.
>
> 73 to all,
>
> Tim - N3TL
> _______________________________________________
> 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: Wed, 3 Jun 2009 13:48:10 +0530
From: "Prathap Kumar" <vu2pop@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-India VO-52 Award
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, <n3tl@xxxxxxxxx.xxx>,
<AMSAT-BB@xxxxx.xxx>
Message-ID: <48E6F40562EE4E61980D0D8A12C874F9@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
You are welcome.
Glad you liked the VO-52 Award
We too are happy.
Best 73
Pop
VU2POP
Amsat India
Dir Technical
----- Original Message -----
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
To: <n3tl@xxxxxxxxx.xxx>; <AMSAT-BB@xxxxx.xxx>
Sent: Tuesday, June 02, 2009 12:34 AM
Subject: [amsat-bb] Re: AMSAT-India VO-52 Award
> Hi All,
>
> I received mine also today. I would also like to second the "thanks" to
> AMSAT India
> for a job well done and V0-52's fourth birthday.
>
> 73 to all,
>
> Rick - WA4NVM
>
>
>
>> Hey everyone,
>>
>> My VO-52 Award arrived in today's mail, and it's very, very nice. It's
>> printed on a very heavy stock and is very attractive. I look forward to
>> getting it in a frame and on display asap.
>>
>> My thanks to everyone at AMSAT-India for their efforts to make the award
>> available, and for providing great operating via VO-52.
>>
>> 73 to all,
>>
>> Tim - N3TL
>> _______________________________________________
>> 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: 4
Date: Wed, 03 Jun 2009 10:21:24 +0100
From: "jrivett@xxxxxxx.xxxx <jrivett@xxxxxxx.xxx>
Subject: [amsat-bb] Full Duplex vs Cross Band - definitions
To: amsat-bb@xxxxx.xxx
Message-ID: <4A264094.2090700@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Sil,
In the world of data comms (not radio), the meanings of terms are generally
as follows :
Simplex = One direction only ( A to B only, never in the other direction )
eg a broadcast, NOAA WX stations, etc
HDX Half Duplex = Alternating on both directions, e.g A to B,
turnaround, B to A, turnaround, A to B, and so on .....
FDX Full Duplex = simultaneously in both directions at same time, A to B
AND B to A.
For Simplex and for HDX only 2 wires (baseband) or 2 FSK frequencies are
enough.
TX and RX dont clash, because they are used Alternately, like a single track
railway.
Turnaround Time was always an important factor, because it slowed down the
total amount of data transferred per hour, and required careful
synchronisation of modem turnarounds at both ends.
For Full Duplex FDX you need a 2 track railway, or 4 wires, or 4 FSK
frequencies, which can send and receive at the same time, for trains to go in
both directions, for cars to pass on an an ordinary road, for data to pass
(ignoring phase modulation and other techniques.)
Simplex, HDX and FDX have nothing to do with Cross-Band working.
Cross-Band is a completely separate and additional requirement.
FM Repeaters often are FDX with frequencies only 600 khz apart, which is
Same-Band FDX in the repeater-radio (and used in HDX mode by human users with
HDX radios).
Humans using Satellites at VHF and UHF for Simultaneous Up and Down links,
require radios with FDX and Cross-band functions.
To summarise, for sat operations, two different functions are required of a
radio,
FDX and Cross-Band working.
Combining these 2 separate function names into one name seems to confuse the
matter.
73
de M3RRX
------------------------------
Message: 5
Date: Wed, 3 Jun 2009 07:15:05 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] 1200 mhz amp PTT
To: <amsat-bb@xxxxx.xxx>, <ke5gdb@xxxxx.xxx>
Message-ID: <004401c9e43c$8c1c10b0$a4543210$@xxx>
Content-Type: text/plain; charset="us-ascii"
I purchased a kj6ko amp and I'm trying to key it with my 910. I can simply
run a ground from the PTT terminal when I want to tx. This isn't recommended
but does work. The 910 doesn't have a single purpose amp control connector.
Does anyone have an amp working with one of the existing ports on the 910. I
don't need T/R switching as I'm just using 1200 mhz for tx only. The TX PTT
control on the amp is rated around 7ma and 30v.
73 Jeff kb2m
------------------------------
Message: 6
Date: Wed, 3 Jun 2009 07:23:32 -0400
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: 1200 mhz amp PTT
To: "Jeff KB2M" <kb2m@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>,
<ke5gdb@xxxxx.xxx>
Message-ID: <E4FDA0F57E89408DA33C6149F8CC0391@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
My amp ptt is wired to pins 2 and 3 of the ACC socket. There are menu
settings to tell the radio what bands to close on transmit. It's not easy to
gather that this pin does the job from the manual.
73, Drew KO4MA
----- Original Message -----
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>; <ke5gdb@xxxxx.xxx>
Sent: Wednesday, June 03, 2009 7:15 AM
Subject: [amsat-bb] 1200 mhz amp PTT
>
> I purchased a kj6ko amp and I'm trying to key it with my 910. I can simply
> run a ground from the PTT terminal when I want to tx. This isn't
> recommended
> but does work. The 910 doesn't have a single purpose amp control
> connector.
> Does anyone have an amp working with one of the existing ports on the 910.
> I
> don't need T/R switching as I'm just using 1200 mhz for tx only. The TX
> PTT
> control on the amp is rated around 7ma and 30v.
>
> 73 Jeff kb2m
>
>
> _______________________________________________
> 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: Wed, 03 Jun 2009 13:57:34 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] AO-7 Milliwatt Report
To: AMSAT-BB@xxxxx.xxx
Message-ID:
<060320091357.25979.4A26814E00010A1B0000657B22230650029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey everyone,
My thanks to K8YSE, who heard my faint CQ on AO-7 at 13:16 UTC this morning
and called me. We had a contact that lasted about a minute with a few
exchanges, which is really a thrill here because I was transmitting a half-
watt out on a Yaesu FT-817ND.
As I suspected from the "test run" the other night, my setup here requires
that AO-7 reach roughly 50 degrees elevation before I can hear myself at all
on this lowest-of-all power settings for my SSB/CW satellite station. I also
suspect I can lower that elevation some by working CW instead of SSB, and I
intend to find out on the next really high pass over me.
Thanks, too, to Rick, WA4NVM, Pete, WB2OQQ, and others who were listening for
me on the pass. By and large, the AMSAT community comprises wonderful folks
who are always willing and enthusiastic to help out whenever I get a wild hair
to try something on the satellites. I appreciate all of you very much.
73 to all,
Tim - N3TL
------------------------------
Message: 8
Date: Wed, 03 Jun 2009 10:32:33 -0400
From: "Steve kb9ups" <kb9ups@xxxxxx.xxx>
Subject: [amsat-bb] LabJack problem
To: amsat-bb@xxxxx.xxx
Message-ID: <20090603103233.20788@xxxxxx.xxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello All,
When connecting the LabJack/piggy back unit to NOVA I get "Devise not
reconized" ? Using Windows XP. Can someone help?
Steve/kb9ups
ARISS Mentor
AMSAT area coordinator, Toledo, Oh.
AMSAT area coordinator, Streator, IL.
www.qsl.net/kb9ups
------------------------------------------------------------
Credit Report
Click to find information on your credit score and your credit report.
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njVqXWH3Hq/
------------------------------
Message: 9
Date: Wed, 03 Jun 2009 11:32:48 -0400
From: Peter <roi@xxxxxxxxx.xxx>
Subject: [amsat-bb] N3TL
To: AMSAT-BB@xxxxx.xxx
Message-ID: <001f01c9e460$cf4b9440$6901a8c0@xxxxx>
Content-Type: text/plain; charset=Windows-1252
Tim,
We enjoyed listening for your signal on AO-7 today, you embody the spirit of
adventure and experimentation that gave rise to AMSAT and the Satellite
program. Tim, it is a learning experience for all of us to be part of your
expanding the horizons of possibility, thank you and keep exploring and
asking, why not!
73,
Pete, WB2OQQ
------------------------------
Message: 10
Date: Wed, 3 Jun 2009 12:46:30 -0300
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-7 Milliwatt Report
To: n3tl@xxxxxxxxx.xxx
Cc: AMSAT-BB@xxxxx.xxx
Message-ID:
<49657a760906030846rb7b6772g178028df37dc6eee@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Wed, Jun 3, 2009 at 10:57 AM, <n3tl@xxxxxxxxx.xxx> wrote:
> Hey everyone,
>
> My thanks to K8YSE, who heard my faint CQ on AO-7 at 13:16 UTC this morning
and called me. We had a contact that lasted about a minute with a few
exchanges, which is really a thrill here because I was transmitting a half-
watt out on a Yaesu FT-817ND.
>
> As I suspected from the "test run" the other night, my setup here requires
that AO-7 reach roughly 50 degrees elevation before I can hear myself at all
on this lowest-of-all power settings for my SSB/CW satellite station. I also
suspect I can lower that elevation some by working CW instead of SSB, and I
intend to find out on the next really high pass over me.
This is an interesting experiment. It is worth pointing out to those
who might not be familiar with this bird that 50 degrees as a minimum
elevation on AO-7 is much more practical than for lower elevation
birds, such as AO-51. I suspect the time that AO-7 is above 50
degrees on some passes is about the same amount of time that VO-52 is
above the horizon! Moreover, because of the greater footprint, when
you transmit to AO-7 overhead, you might still reach a different
continent or other excitingly distant stations.
Another consideration regarding Tim's experimental approach is that it
is ideal for situations in which a low-gain antenna is being used for
reception. It is better for everyone if in these circumstances we do
not increase our transmission power until we can hear ourselves
(especially on AO-7, which FMs quite a bit). Keeping the xmit power
low and waiting until it can be heard is a good way to experiment
without causing problems.
73, Bruce
VE9QRP
------------------------------
Message: 11
Date: Wed, 03 Jun 2009 16:25:14 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AO-7 Milliwatt Report
To: Bruce Robertson <ve9qrp@xxxxx.xxx>
Cc: AMSAT-BB@xxxxx.xxx
Message-ID:
<060320091625.21632.4A26A3EA0001699B0000548022230650029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey everyone,
Please forgive the pun (that is a warning!) ... but to amplify Bruce's
thoughts....
Milliwatt contacts on VO-52 will be routine for anyone who chooses to take
this approach. It is a wonderful little satellite, with outstanding
performance.
As mentioned in my earlier post, I intend to see how my ability to hit AO-7 on
a half-watt changes when I use CW instead of SSB. There should be another pass
yet this week that will permit this, and I'm looking forward to it.
Bruce also is right about the coverage of AO-7. According to the map that
Orbitron displays when I'm in simulation mode, here is a general idea of the
satellite's footprint at 13:17 UTC, when K8YSE and I were finishing our
contact.
The southern edge of the footprint literally was on the equator, and the
northern edge appears to have been at roughly 70 degrees North. The eastern
edge was at roughly 40 degrees west, with the western edge at roughly 130
degrees West. As a result, all of the lower 48 states were in the footprint,
along with about the eastern 70 percent of Canada. All of Central America was
in the footprint, along with portions of Ecuador, Colombia, Venezuela and
Guyana. All of the islands representing various DXCC entities in the Caribbean
were in the footprint, as was Bermuda.
73 to all,
Tim
-------------- Original message from Bruce Robertson <ve9qrp@xxxxx.xxx>: -----
---------
> On Wed, Jun 3, 2009 at 10:57 AM, wrote:
> > Hey everyone,
> > > My thanks to K8YSE, who heard my faint CQ on AO-7 at 13:16 UTC this
morning and called me. We had a contact that lasted about a minute with a few
exchanges, which is really a thrill here because I was transmitting a half-
watt out on a
> Yaesu FT-817ND.
> > > As I suspected from the "test run" the other night, my setup here
requires that AO-7 reach roughly 50 degrees elevation before I can hear myself
at all on this lowest-of-all power settings for my SSB/CW satellite station. I
also suspect I can lower that elevation some by working CW instead of SSB, and
I
> intend to find out on the next really high pass over me.
>
> This is an interesting experiment. It is worth pointing out to those
> who might not be familiar with this bird that 50 degrees as a minimum
> elevation on AO-7 is much more practical than for lower elevation
> birds, such as AO-51. I suspect the time that AO-7 is above 50
> degrees on some passes is about the same amount of time that VO-52 is
> above the horizon! Moreover, because of the greater footprint, when
> you transmit to AO-7 overhead, you might still reach a different
> continent or other excitingly distant stations.
>
> Another consideration regarding Tim's experimental approach is that it
> is ideal for situations in which a low-gain antenna is being used for
> reception. It is better for everyone if in these circumstances we do
> not increase our transmission power until we can hear ourselves
> (especially on AO-7, which FMs quite a bit). Keeping the xmit power
> low and waiting until it can be heard is a good way to experiment
> without causing problems.
>
> 73, Bruce
> VE9QRP
------------------------------
Message: 12
Date: Wed, 03 Jun 2009 16:36:30 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: N3TL
To: Peter <roi@xxxxxxxxx.xxx>, AMSAT-BB@xxxxx.xxx
Message-ID:
<060320091636.17979.4A26A68E000AA3120000463B22230650029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey Pete,
Thanks for the very kind words. I don't have nearly the technical expertise as
many who read the BB and operate our satellites. Those are the folks who ask
"why not?" when it comes to designing and building satellites and the gear to
work them.
My approach has been to try for total versatility and total portability in a
station that doesn't cost an arm and a leg, but that will provide a vast
majority of the excitement and enjoyment achieved by those who have, indeed,
chosen to go "state of the art" with their stations.
There's more to come in that regard. It seems as though every time I answer a
"I wonder if it's possible to ..." question, I come up with one or two more as
a result ... hihi. Learning more about my AO-7 capability with a half-watt in
CW is the perfect example.
The most important element of all of this is my desire to NOT do anything
special or extraordinary. I'm not. Any licensed amateur with an interest in
satellite operation can do what I'm doing. I wish (and hope) more of them
would give it a try.
73 to all,
Tim
-------------- Original message from Peter <roi@xxxxxxxxx.xxx>: --------------
> Tim,
>
> We enjoyed listening for your signal on AO-7 today, you embody the spirit of
> adventure and experimentation that gave rise to AMSAT and the Satellite
> program. Tim, it is a learning experience for all of us to be part of your
> expanding the horizons of possibility, thank you and keep exploring and
> asking, why not!
>
> 73,
> Pete, WB2OQQ
>
>
> _______________________________________________
> 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 257
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