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CX2SA > SATDIG 20.10.08 02:17l 808 Lines 30713 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: beginner question re: uplink power (Roger Kolakowski)
2. Re: beginner question re: uplink power (Roger Kolakowski)
3. Re: xmit sstv to the ISS (Steve)
4. Re: beginner question re: uplink power (Edward Cole)
5. NA1SS Audio from 19Oct08 1320Z and 1809Z (John Papay)
6. Re: beginner question re: uplink power (corner5)
7. qsl sstv ISS (Mr Jeffrey L Ross)
8. Re: beginner question re: uplink power (Edward Cole)
9. ISS SSTV over PY Land (Fabio Teixeira Magalhaes)
10. ISS this afternoon (santanaamt@xxx.xxxx
11. Icom ic-820H Problems (Chad Wasinger)
12. Re: beginner question re: uplink power (Michael Tondee)
13. Re: WB9L cross-satellite again (Wayne Estes)
14. Re: WB9L cross-satellite again (n3tl@xxxxxxxxx.xxxx
15. Re: WB9L cross-satellite again (Nigel Gunn G8IFF/W8IFF)
----------------------------------------------------------------------
Message: 1
Date: Sun, 19 Oct 2008 15:30:36 -0400
From: "Roger Kolakowski" <rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: "corner5" <corner5@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <001401c93221$29859660$0200a8c0@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I think I would contact Ramsey and see what the resistor selection
limitations are, unless you have a schematic and can determine it from the
design.
Sure enough, if you set it for 10 watts you are going to, some day, put 50
or 100 watts through it in error and I'm assuming if you kill the remote
switching it defaults to receive and therefore doesn't switch the preamp out
resulting in a trip up the tower to fix 2 things.
If you set it for 100 watts, you will someday want to run less and again it
won't key. Same trip up the tower.
Hard wiring, as has been suggested, is your safest choice. As the switch has
the relay in it, maybe Ramsey can tell you where to tap in to directly
switch the sensor.
Nice choice of rig though ;-)
Roger
WA1KAT
----- Original Message -----
From: "corner5" <corner5@xxxxxxx.xxx>
To: "Roger Kolakowski" <rogerkola@xxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Sunday, October 19, 2008 1:42 PM
Subject: [amsat-bb] Re: beginner question re: uplink power
> Hi Roger,
>
> Thanks very much for the reply. I did forget to mention that I will be
> using my Kenwood TS2000 for this purpose. This allows me the full 0-100
> watts choice for 2m, and 0-50 watts choice for 70cm. The preamps are
> only for receive. The RF switches are between the rig and the preamps
> and will bypass the preamps upon transmit. I can start out my RF out
> anywhere within the above stated ranges.
>
> Any further thoughts?
>
> .paul
>
------------------------------
Message: 2
Date: Sun, 19 Oct 2008 15:30:36 -0400
From: "Roger Kolakowski" <rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: "corner5" <corner5@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <001501c93221$2a02b5a0$0200a8c0@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I think I would contact Ramsey and see what the resistor selection
limitations are, unless you have a schematic and can determine it from the
design.
Sure enough, if you set it for 10 watts you are going to, some day, put 50
or 100 watts through it in error and I'm assuming if you kill the remote
switching it defaults to receive and therefore doesn't switch the preamp out
resulting in a trip up the tower to fix 2 things.
If you set it for 100 watts, you will someday want to run less and again it
won't key. Same trip up the tower.
Hard wiring, as has been suggested, is your safest choice. As the switch has
the relay in it, maybe Ramsey can tell you where to tap in to directly
switch the sensor.
Nice choice of rig though ;-)
Roger
WA1KAT
----- Original Message -----
From: "corner5" <corner5@xxxxxxx.xxx>
To: "Roger Kolakowski" <rogerkola@xxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Sunday, October 19, 2008 1:42 PM
Subject: [amsat-bb] Re: beginner question re: uplink power
> Hi Roger,
>
> Thanks very much for the reply. I did forget to mention that I will be
> using my Kenwood TS2000 for this purpose. This allows me the full 0-100
> watts choice for 2m, and 0-50 watts choice for 70cm. The preamps are
> only for receive. The RF switches are between the rig and the preamps
> and will bypass the preamps upon transmit. I can start out my RF out
> anywhere within the above stated ranges.
>
> Any further thoughts?
>
> .paul
>
------------------------------
Message: 3
Date: Sun, 19 Oct 2008 20:02:21 -0000
From: "Steve" <ai7w@xxxx.xxx>
Subject: [amsat-bb] Re: xmit sstv to the ISS
To: "amsat" <amsat-bb@xxxxx.xxx>
Message-ID: <281A8AD6329E48A0A25D285F5ECBC45F@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I believe this would be impractical. There are a number of satellite
operators that don't read these messages. Of those that do, there are bound
to be some who don't wish to comply with the rules for one reason or
another. If only a hand-full don't cooperate the resulting pandemonium would
encourage those that do cooperate to abandon the program or give up.
If you've ever been in a DX pileup, you'll know what I'm talking about.
Steve .. AI7W
----- Original Message -----
From: "Mr Jeffrey L Ross"
Sent: Sunday, October 19, 2008 15:42 UTC
Subject: [amsat-bb] xmit sstv to the ISS
> Hi folks, one member just reminded me about what is the chance one station
> uplinking one picture uniterrupted?
> Maybe we could cordinate here and use are calls as a your turn my turn
> such
> as abzzz goes first as his starts with A, or use the last letter of the
> call
> such as kc8gkf and everyone with f in there call (last letter) thats there
> day to xmit up. something like that I think we could work out. That would
> cut down on the stations trying to xmit up. Or someone could pass out
> times
> to the users (get a list here) to xmit up. Anyother ideas?
>
> kc8gkf
------------------------------
Message: 4
Date: Sun, 19 Oct 2008 12:06:30 -0800
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: n3tl@xxxxxxxxx.xxxx amsat-bb@xxxxx.xxx
Message-ID: <200810192006.m9JK6WaE071124@xxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Very good points, Tim.
Comments on vertical antennas. First define vertical: 1) If you are
referring to a high-gain FM base station antenna, then I would NOT
recommend using one (because the gain compresses the signal pattern
down near the horizon - for better repeater operation at long
range). 2) If you mean a simple 1/4 wavelength ground-plane whip
(like a 19-inch mag-mount attached to a square of sheet steel for the
ground-plane), then (if used with a preamp) it will work quite well
at either 2m or 70cm on Leo's.
Of course you need to use a preamp for the freq. band you desire to
receive. I used a 19-inch mag-mt with P432VGA preamp to collect UHF
telemetry from AO-51 shortly after launch. Also obvious is the need
to provide bypass switching for preamp if you anticipate using the
antenna for transmitting.
The M2 eggbeaters are probably slightly better than (and a whole lot
more $$$) a 19-inch whip as are other more advanced omnis such as:
Lindenblad, and Quadrafillar Helix. But a simple little mag-mt 2m
whip works great (especially with a preamp). For a home-based Leo
station, I think they are fine. For portable (standing in the
parking lot) operation the handheld Arrow is hard to beat.
For hard-core operation using Oscar-0, may I suggest what I am
currently building (tongue-in-cheek):
http://www.kl7uw.com/eme1296.htm
73, Ed - KL7UW
At 10:05 AM 10/19/2008, n3tl@xxxxxxxxx.xxx wrote:
>Paul and all,
>
>I would be curious to hear from anyone currently using verticals
>with preamps as their primary receive antennas. I have hesitated to
>respond to your initial post, Paul, because (1) I am very new to the
>satellites; (2) as a result, my personal experience with antennas
>involves only the Arrow handheld antenna, the eFactor 0-gain omni
>antenna, the Elk dual-band log periodic an MFJ mag-mount dual-band
>vertical for my vehicle, and HT-specific antennas (Pryme AL800, MFJ
>1715 and 1717, etc.); and (3) my other knowledge regarding using
>omni antennas for satellite work is limited to what I have read here
>and elsewhere on the Internet.
>
>All of that being said, I believe I would opt for something other
>than a vertical - even with preamps - as my prime base-station
>antennas for the satellies. I haven't yet built one of the Ramsey
>preamps, but I intend to as the weather turns cool here in North
>Georgia and I spend more time inside. I am curious about its ability
>to improve reception for me with the sFactor, which is an
>outstanding transmit antenna for reaching the satellites - based on
>my experiences with it. I also logged more than a dozen contacts
>involving AO-27, AO-51 and SO-50 using the eFactor with an HT as a
>handheld antenna. My personal experience suggests that a preamp
>would help it on the UHF receive side a great deal, although it
>honestly exceeded my expectations - given the physical size of the
>UHF part of the antenna.
>
>The N3TL handheld station has worked 46 states, VE1-2-3-4-5-6-8-9,
>Mexico, Venezuela, Barbados and marimtime mobile stations all on 5
>watts' rf out or less. It also has worked 20 states, Ontario, Mexico
>and Venezuela on .05-watt (50 milliwatts) on the same set of 2 AA
>Duracell batteries. For the sake of perspective, I made my
>first-ever satellite contact on June 28th of this year - less than 4
>months ago.
>
> From here, output power isn't the issue. I believe your money and
> time will be best-invested in optimizing the receive side of your
> satellite station.
>
>Best of luck with it, and 73,
>
>Tim - N3TL
>AMSAT Member No. 36820
>Athens, Ga. - EM84ha
>-------------- Original message from Edward Cole
><kl7uw@xxxxxxxxx.xxx>: --------------
>
>
> > At 09:30 PM 10/18/2008, 12.01 wrote:
> > >hello,
> > >
> > >I have a beginner question. I am in the process of setting up my first
> > >satellite station. My initial investment is minimal and I have chosen
> > >to start out with a pair of 2m and 70cm omni antennas on the roof. To
> > >help out a bit I am also adding a mast mount preamp on each antenna. To
> > >protect the preamps they will be switched out of line by a RF sense
> > >switch (one for each amp). For reference the two preamps and the pair
> > >of RF switches are all made by Ramsey (I know there are better preamps,
> > >but not available in my current budget). I am keeping this initial
> > >adventure limited to the LEOs (and ISS, etc.).
> > >
> > >_The question: _ When I assemble the RF switches I must choose a RF
> > >range for the switch to work within. The range is determined by the
> > >choice of a specific resistor. The default three ranges suggested are
> > >0-10 watts, 10-30 watts, and 30-100 watts. I would be able to change
> > >the range later but it would require removing the unit from the mast.
> > >
> > >So... not having any experience (yet),_ what uplink power range is
> > >recommend for non-gain antennas?_ Is there one range that should cover
> > >the LEOs? If not, how much should I expect the required uplink power
> > >needs to vary across various satellites? Is it different for each band?
> > >I have read that it is always best to never be louder than the beacon
> > >and that's fine. I'm just needing to know where to start off my
> > >hardware choices.
> > >
> > >Thanks in advance for any help from you folks with the know-how. I look
> > >forward to a qso with you.
> > >
> > >.paul ac0z
> > >_______________________________________________
> > >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
> >
> > I'm surprised that you have had only one reply. I am not QRV on the
> > Leos so my advise is not as good as what you might get. My
> > "understanding" is that one can work most of the Leos with power
> > <10w. This is IF the stations on the bird also comply by not using
> > more power than is needed. If a "power war" ensues to try to capture
> > the satellite then running low power may be less effective to "break in".
> >
> > But seeing that so many folks run HT's that typically are 5w, I think
> > you might chose the lowest range as long as your equipment output
> > matches. You have to consider that you will have no antenna gain
> > using omni-directional antennas so uplink RF power needs are
> > affected, accordingly. NOW if some experienced sat op will add their
> > input on this subject you should have the info you need.
> >
> > I wonder if the Ramsey preamps allow for "hard" switching. That is
> > by separate control line that the radio PTT controls. Then You have
> > no issue with RF power and would run the units with the RF sense
> > disabled. I should state that "many" (dare I say most) experienced
> > VHFers that run high power (>100w) use hard-wired switching. I know
> > of NO eme stations that use RF sense control lines.
> >
> > PS: when my standard AO-10/13/40 ground station is re-installed I
> > will have available 5-60w with 16.5 dBc UHF uplink (all-mode).
> >
> >
> > ***********************************************************
> > 73, Ed - KL7UW BP40iq, 6m - 3cm
> > 144-EME: FT-847, mgf-1801, 4x-xp20, 185w
> > 1296-EME: DEMI-Xvtr, 0.30 dBNF, 4.9m dish, 60W
> > http://www.kl7uw.com AK VHF-Up Group
> > NA Rep. for DUBUS: dubususa@xxxxxxx.xxx
> > ***********************************************************
> >
> > _______________________________________________
> > 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: Sun, 19 Oct 2008 16:12:24 -0400
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] NA1SS Audio from 19Oct08 1320Z and 1809Z
To: amsat-bb@xxxxx.xxx
Message-ID: <200810192010.m9JKAovc023671@xxxx.xxxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
More stations are getting through on each pass.
A mp3 recording of NA1SS qso's with the dead
air mostly removed can be downloaded at:
http://www.papays.com/ISS_19Oct2008_132038z.mp3
http://www.papays.com/ISS_19Oct2008_180908z.mp3
Enjoy.
73,
John K8YSE
------------------------------
Message: 6
Date: Sun, 19 Oct 2008 13:22:07 -0700
From: corner5 <corner5@xxxxxxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: amsat-bb@xxxxx.xxxx corner5@xxxxxxx.xxx
Message-ID: <48FB96EF.1040000@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks for replys (Re: beginner question re: uplink power)
In response to two points contained in replys from helpful others...
> Ed - KL7UW: I wonder if the Ramsey preamps allow for "hard" switching.
That is
by separate control line that the radio PTT controls. Then You have
no issue with RF power and would run the units with the RF sense
disabled. I should state that "many" (dare I say most) experienced
VHFers that run high power (>100w) use hard-wired switching. I know
of NO eme stations that use RF sense control lines.
A: Ed, yes this is a good suggestion. In fact these preamps are very simple
units. No, they do not have any switching that would
allow for external PPT communication from the TS2000 (0-100w@xxx 0-50w@xxxxx.
That said, I certainly could add my own mast mount external relay
to do the switching. I also could simply install a DPDT or TPDT switch at the
shack end and manually do the switching. This last
approach could lead to smoking the preamp the one time I forget to toggle it
out of line. So, in the end I chose to
go with the RF sense remote switch. I hope the need to contain my uplink RF
withing a chosen range (0-10 or
10-30 or 30-100 watts) will not be too limiting.
> Tim - N3TL: I would be curious to hear from anyone currently using
verticals with preamps as their primary receive antennas.
A: Tim, I think technically you would not call my antennas vertical, but here
is what I will start using:
I have now completed the 2m / 70cm pair of double moxon (co-phased) fixed
omnis. Each antenna has two moxons that
are 90 deg to each other. I used the plans as published in
QST, August 2001, author = L.B. Cebik. I chose these antennas do to wishing
to avoid the expense and tracking logistics of
a beam (for my first setup). I suspect I will go to this upgrade later as I
learn more. Some prefer the more
conventional turn-style design, Lindenblad, Quadrafillar Helix but I thought I
would try this out and see.
> Roger,WA1KAT: I think I would contact Ramsey and see what the resistor
selection
limitations are, unless you have a schematic and can determine it from the
design.
A: In fact I already have both the schematic as well as the resistor values
that achieve the specific power windows.
I verified with Ramsey that if I wanted I could replace the resistor with a
pot for a full range. Unfortunately
this does not really address the fact that I will still be restricted to a
given range (although with the pot I
would have more flexibility as to choosing my range). Also a more wacky
thought I had was to have the resistors
(or pots) located in the shack and toggle them as needed.
> Roger,WA1KAT: Hard wiring, as has been suggested, is your safest choice. As
the switch has
the relay in it, maybe Ramsey can tell you where to tap in to directly
switch the sensor.
A: This is a very interesting approach. If I understand your idea here, you
suggest to use the relay that is
on the RF switch board and toggle this relay with a PPT signal from the TS2000
(and not make use of the RF sense at all. Yes?
I do not know about the details of using the PPT signal in this way. I guess I
need to hope that the PPT signal
is compatible with the relay (voltage). And then if I need to abandon the RF
switch all together, are there suggestions
as to what is a good (not too expensive) remote relay design?
thanks all!
.paul AC0z
------------------------------
Message: 7
Date: Sun, 19 Oct 2008 16:17:35 -0400
From: "Mr Jeffrey L Ross" <radiooperator@xxxxxxx.xxx>
Subject: [amsat-bb] qsl sstv ISS
To: "amsat" <amsat-bb@xxxxx.xxx>
Message-ID: <600AB6656BDF4B2082CA101116D23898@xxxxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Folks, got a good sstv pic from inside the space station last pass,
making it worth the wait till the fm chatting is over.
Pic came in great also.
kc8gkf
using mmsstv mixw wont run sstv today for some reason.
------------------------------
Message: 8
Date: Sun, 19 Oct 2008 12:30:34 -0800
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: corner5 <corner5@xxxxxxx.xxx>, amsat-bb@xxxxx.xxxx
corner5@xxxxxxx.xxx
Message-ID: <200810192031.m9JKVG9d035140@xxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 12:22 PM 10/19/2008, corner5 wrote:
>Thanks for replys (Re: beginner question re: uplink power)
>===snip===
>A: This is a very interesting approach. If I understand your idea
>here, you suggest to use the relay that is
>on the RF switch board and toggle this relay with a PPT signal from
>the TS2000 (and not make use of the RF sense at all. Yes?
>I do not know about the details of using the PPT signal in this way.
>I guess I need to hope that the PPT signal
>is compatible with the relay (voltage). And then if I need to
>abandon the RF switch all together, are there suggestions
>as to what is a good (not too expensive) remote relay design?
>
Most radios have an aux. TX key line. This will either key the line
to ground (like PTT does), or will provide (usually +12) voltage in
transmit to drive a relay.
Most likely the relays in the Ramsey unit are 12volt relays.
In case #1, you lift the ground lead of the relay and attach that to
your control line from the radio.
In case #2, you lift the +12v lead to the relay (from the RF sense
ckt) and attach that to your control line.
You probably only need one wire as the preamp dc power wiring will
provide the other wire which ever case# applies. If the preamp is
powered over the RF coax line, the radio may not supply sufficient
current to drive the unit (check this out in the radio manual and
Ramsey specs).
I would also disconnect the relay from the RF sense ckt in any case
so that it does not cause any false keying issues.
Simple! Enjoy!
73 - Ed
------------------------------
Message: 9
Date: Sun, 19 Oct 2008 17:49:41 -0300
From: Fabio Teixeira Magalhaes <ftmagalhaes@xxxxx.xxx.xx>
Subject: [amsat-bb] ISS SSTV over PY Land
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <48FB9D65.2030906@xxxxx.xxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Got a good sstv pics from inside the space station over Brazil, SA.......
Orbt nr 56814 AOS: 22:02 LOS: 22:12 Max Elev.: 28?
73 es DX
Fabio - PY4AJ
AMSAT 19748
------------------------------
Message: 10
Date: Sun, 19 Oct 2008 17:55:06 -0400
From: santanaamt@xxx.xxx
Subject: [amsat-bb] ISS this afternoon
To: amsat-bb@xxxxx.xxxx sarex@xxxxx.xxx
Message-ID: <8CB004C7BB2BEE4-C98-75D@xxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi again:
Between 1955 and 1959 UTC got 2 images of good quality; then at 2130 heard
maybe Richard in QSO with a YV station? . . . the pass was 3 degrees maximum
so let's see tomorrow.
Angel - WP3GW
------------------------------
Message: 11
Date: Sun, 19 Oct 2008 17:17:44 -0500
From: "Chad Wasinger" <n0yk@xxxxxx.xxx>
Subject: [amsat-bb] Icom ic-820H Problems
To: <amsat-bb@xxxxx.xxx>
Message-ID: <433CB15CDDDE4B8384498C357163A37A@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
I have an Icom 820H that is having some issues with transmit/receive. The
radio just acts funny, receive audio level very low, but at the same time the
key tones are normal audio level. The display won't keep a freq on it, when
powered on the frequency appears, then disappears after a few seconds. The
radio won't transmit and when I tune to a local 2 meter beacon, nothing is
heard.
I've double checked power supply voltage, checked that all ribbon cables are
properly seated, and done a factory reset without any luck.
If anyone has any troubleshooting tips for me, please send me an email. Radio
was stored for a while and just turned on for use.
Thanks in Advance,
Chad
N0YK
------------------------------
Message: 12
Date: Sun, 19 Oct 2008 18:18:01 -0400
From: "Michael Tondee" <mat_62@xxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: beginner question re: uplink power
To: "corner5" <corner5@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <81693F4CE2C44D4797039C8965AFCE3B@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Paul,
If i remember correctly there was gent on this board awhile back that
reported some issues with the RF switching of Ramsey preamps. I believe the
problem had something to do with the switching cutting in and out while
using SSB. I can't remember the exact issue. though. Still you may want to
take this into consideration when making the decision whether to go with
hard switching or not.
73,
Michael,W4HIJ
----- Original Message -----
From: "corner5" <corner5@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>; <corner5@xxxxxxx.xxx>
Sent: Sunday, October 19, 2008 4:22 PM
Subject: [amsat-bb] Re: beginner question re: uplink power
> Thanks for replys (Re: beginner question re: uplink power)
>
> In response to two points contained in replys from helpful others...
>
>> Ed - KL7UW: I wonder if the Ramsey preamps allow for "hard" switching.
>> That is
> by separate control line that the radio PTT controls. Then You have
> no issue with RF power and would run the units with the RF sense
> disabled. I should state that "many" (dare I say most) experienced
> VHFers that run high power (>100w) use hard-wired switching. I know
> of NO eme stations that use RF sense control lines.
>
> A: Ed, yes this is a good suggestion. In fact these preamps are very
> simple units. No, they do not have any switching that would
> allow for external PPT communication from the TS2000 (0-100w@xxx
> 0-50w@xxxxx. That said, I certainly could add my own mast mount external
> relay
> to do the switching. I also could simply install a DPDT or TPDT switch at
> the shack end and manually do the switching. This last
> approach could lead to smoking the preamp the one time I forget to toggle
> it out of line. So, in the end I chose to
> go with the RF sense remote switch. I hope the need to contain my uplink
> RF withing a chosen range (0-10 or
> 10-30 or 30-100 watts) will not be too limiting.
>
>> Roger,WA1KAT: Hard wiring, as has been suggested, is your safest choice.
>> As the switch has
> the relay in it, maybe Ramsey can tell you where to tap in to directly
> switch the sensor.
>
> A: This is a very interesting approach. If I understand your idea here,
> you suggest to use the relay that is
> on the RF switch board and toggle this relay with a PPT signal from the
> TS2000 (and not make use of the RF sense at all. Yes?
> I do not know about the details of using the PPT signal in this way. I
> guess I need to hope that the PPT signal
> is compatible with the relay (voltage). And then if I need to abandon the
> RF switch all together, are there suggestions
> as to what is a good (not too expensive) remote relay design?
>
> thanks all!
> .paul AC0z
------------------------------
Message: 13
Date: Sun, 19 Oct 2008 17:25:54 -0500
From: Wayne Estes <w9ae@xxxxxxx.xxx>
Subject: [amsat-bb] Re: WB9L cross-satellite again
To: amsat-bb@xxxxx.xxx
Message-ID: <48FBB3F2.4030004@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Jeff WB2SYK wrote:
How about "an inadvertent QSO'??
Wayne W9AE replies:
Kind of like when RS-12 was in Mode K (15m up, 10m down). It was common
to hear a CQ where it was obvious that the station calling CQ didn't
know his 15m transmit signal was being repeated by RS-12. I would
answer the CQ and inform the other guy that I'm hearing him on the 10m
downlink of a satellite. The other station, of course, was listening to
my 15m signal, not the satellite's 10m downlink.
I don't know what you would call this, but it's not a valid 2-way
satellite contact or a valid 2-way HF contact.
Wayne Estes W9AE
Oakland, Oregon, USA, CN83ik
------------------------------
Message: 14
Date: Sun, 19 Oct 2008 22:49:27 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: WB9L cross-satellite again
To: Wayne Estes <w9ae@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID:
<101920082249.25379.48FBB976000B45EA0000632322193100029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey Folks,
With no intent to be disrespectful, I have to disagree with Mr. Estes'
statement that what I have done a total of three times with two different
stations should not be considered valid satellite contacts.
I looked up the word valid, and list here the first two definitions of that
word because they are the most germaine to this discussion:
1.sound; just; well-founded: a valid reason.
2.producing the desired result; effective: a valid antidote for gloom.
I'm confident that there are many divergent perspectives on whether these
contacts, which involved both AO-51 and AO-16, were sound, just and/or well-
founded. However, I have a recording - mentioned in an earlier post today -
that proves unequivocably that what happened produced the desired result (the
stations involved were on the satellites with the intent of contacting other
stations, which they did) and was effective (each station acknowledged the
other and exchanged information - no different than had only one satellite
been involved).
I suppose that the most accurate term to use is that they were dual-band (2
meters and 70cm), dual-mode (FM and SSB), dual-satellite contacts because both
satellites had to come into play for the contacts to be completed.
73 to all,
Tim - N3TL
AMSAT Member No. 36820
Athens, Ga. - EM84ha
-------------- Original message from Wayne Estes <w9ae@xxxxxxx.xxx>: ---------
-----
> Jeff WB2SYK wrote:
>
> How about "an inadvertent QSO'??
>
> Wayne W9AE replies:
>
> Kind of like when RS-12 was in Mode K (15m up, 10m down). It was common
> to hear a CQ where it was obvious that the station calling CQ didn't
> know his 15m transmit signal was being repeated by RS-12. I would
> answer the CQ and inform the other guy that I'm hearing him on the 10m
> downlink of a satellite. The other station, of course, was listening to
> my 15m signal, not the satellite's 10m downlink.
>
> I don't know what you would call this, but it's not a valid 2-way
> satellite contact or a valid 2-way HF contact.
>
> Wayne Estes W9AE
> Oakland, Oregon, USA, CN83ik
>
> _______________________________________________
> 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: 15
Date: Sun, 19 Oct 2008 23:14:10 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: WB9L cross-satellite again
To: n3tl@xxxxxxxxx.xxx
Cc: sparkycivic@xxxx.xxx AMSAT-BB@xxxxx.xxx
Message-ID: <48FBBF42.80509@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
The problem is that the satellites were in parallel.
They have to be series connected to count as a cross-satellite contact.
n3tl@xxxxxxxxx.xxx wrote:
> WB9L is intentionally working AO-51, which is thousands of km away from
> and pretty much opposite AO-16, which N3TL is intentionally working.
> Indeed, both satellites have the same FM/VHF uplink. WB9L copies N3TL on
> AO-51 at 435.300 +/-, in FM. N3TL copies WB9L on AO-16 at 437.026 +/-,
> in SSB. It seemed clear to me that a complete contact between these two
> stations occurred across both satellites.
------------------------------
_______________________________________________
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 3, Issue 540
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