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CX2SA > SATDIG 22.12.10 14:24l 832 Lines 28198 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: AO-51 S-Band antenna polarization
(Patrick STODDARD (WD9EWK/VA7EWK))
2. Re: AO-51 S-Band antenna polarization (Andrew Glasbrenner)
3. Re: AO-51 S-Band antenna polarization (Alan P. Biddle)
4. Re: AO-51 S-Band antenna polarization (Mark L. Hammond)
5. Re: AO-51 S-Band antenna polarization (Miguel A. Vallejo)
6. Re: AO-51 S-Band antenna polarization (jmfranke)
7. Re: Elk dualband antenna experiences (Ted)
8. Re: AO-51 S-Band antenna polarization (i8cvs)
9. Re: AO-51 S-Band antenna polarization (Edward R. Cole)
10. Re: Elk dualband antenna experiences (David Palmer)
11. The Winner (Martha)
12. Re: Elk dualband antenna experiences (Andrew Glasbrenner)
13. Re: Elk dualband antenna experiences (John Neeley)
14. AO7 modeA??? (Edward R. Cole)
15. FAST 1/2 (Jack Barbera)
16. Re: FAST 1/2 (Andrew Glasbrenner)
----------------------------------------------------------------------
Message: 1
Date: Tue, 21 Dec 2010 13:02:18 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTi=e_bbAV_UJVhGsNQsn71KTpbNnufLt2bUMQArP@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi John!
> Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
> Are they circular? ?If so which polarity, RHCP or LHCP? ?Are they linear?
> If so is there a preferred receiving polarization? ?I have examined the
> AMSAT web site and many references on the Internet, but cannot seem to find
> the answer.
It's linear. Page 7 in the PDF at:
http://www.amsat.org/amsat-new/echo/OSCAR-E_Status_Report_5.pdf
has a brief description and a picture of the L/S antenna on AO-51.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 2
Date: Tue, 21 Dec 2010 15:09:31 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: jmfranke <jmfranke@xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4D11097B.9050003@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 12/21/2010 2:56 PM, jmfranke wrote:
> Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
> Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
> If so is there a preferred receiving polarization? I have examined the
> AMSAT web site and many references on the Internet, but cannot seem to find
> the answer.
>
> Thanks,
>
> John WA4WDL AMSAT member 10211
>
435.300 is RHCP
435.150 is LHCP
VHF, L, and S are linear
73, Drew KO4MA
------------------------------
Message: 3
Date: Tue, 21 Dec 2010 14:10:46 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: "'jmfranke'" <jmfranke@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <42CAED531BBC48A9BF208AAB86D0B766@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
John,
It is linear. You are right that the information exists, but is sometimes
not readily available. A good place to look is the Weekly Satellite Report
which AMSAT distributes. For many, but not all satellites, that information
is just below the frequency information. For AO-51 we find:
Mode and Antenna Polarization:
V: Linear
U: TX A (usually digital)LHCP
TX B (usually analog) RHCP
L: Linear
S: Linear
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of jmfranke
Sent: Tuesday, December 21, 2010 1:57 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
If so is there a preferred receiving polarization? I have examined the
AMSAT web site and many references on the Internet, but cannot seem to find
the answer.
Thanks,
John WA4WDL AMSAT member 10211
_______________________________________________
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: Tue, 21 Dec 2010 15:14:13 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: "jmfranke" <jmfranke@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <lwEX1f00D56cfur05wEaZ4@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi John,
Both the S-band and L-band antennas are linear.
http://bach.as.arizona.edu/gallery/main.php?g2_itemId=8340&g2_page=3
and
http://bach.as.arizona.edu/gallery/main.php?g2_itemId=8550
73!
Mark N8MH
At 02:56 PM 12/21/2010 -0500, jmfranke wrote:
>Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
>Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
>If so is there a preferred receiving polarization? I have examined the
>AMSAT web site and many references on the Internet, but cannot seem to find
>the answer.
>
>Thanks,
>
>John WA4WDL AMSAT member 10211
>
>
>_______________________________________________
>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
Mark L. Hammond [N8MH]
------------------------------
Message: 5
Date: Tue, 21 Dec 2010 21:16:10 +0100
From: "Miguel A. Vallejo" <ea4eoz@xxxxx.xx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: amsat-bb@xxxxx.xxx
Message-ID: <4D110B0A.6040807@xxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
jmfranke wrote:
> Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
> Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
Last Sunday I tried to receive the 2.4GHz downlink with a linear
polarized wifi patch and signals seem to be linear polarized. I was all
the pass rotating the antenna to get the better signal. Most of time
signal was almost horizontally polarized.
73 de EA4EOZ
------------------------------
Message: 6
Date: Tue, 21 Dec 2010 15:17:22 -0500
From: "jmfranke" <jmfranke@xxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: <APBIDDLE@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <CFD73A0DC22447CCB086D296E33BF78F@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Many thanks to all who responded. The additional references were great!
Thanks to all,
John WA4WDL
--------------------------------------------------
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Sent: Tuesday, December 21, 2010 3:10 PM
To: "'jmfranke'" <jmfranke@xxx.xxx>; <amsat-bb@xxxxx.xxx>
Subject: RE: [amsat-bb] AO-51 S-Band antenna polarization
> John,
>
> It is linear. You are right that the information exists, but is sometimes
> not readily available. A good place to look is the Weekly Satellite
> Report
> which AMSAT distributes. For many, but not all satellites, that
> information
> is just below the frequency information. For AO-51 we find:
>
> Mode and Antenna Polarization:
>
> V: Linear
> U: TX A (usually digital)LHCP
> TX B (usually analog) RHCP
> L: Linear
> S: Linear
>
> Alan
> WA4SCA
>
>
>
>
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of jmfranke
> Sent: Tuesday, December 21, 2010 1:57 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] AO-51 S-Band antenna polarization
>
> Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
> Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
> If so is there a preferred receiving polarization? I have examined the
> AMSAT web site and many references on the Internet, but cannot seem to
> find
> the answer.
>
> Thanks,
>
> John WA4WDL AMSAT member 10211
>
>
> _______________________________________________
> 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, 21 Dec 2010 12:28:37 -0800
From: "Ted" <k7trkradio@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Elk dualband antenna experiences
To: "'John Geiger'" <aa5jg@xxxxxxx.xxx>, "'Amsat-Bb@xxxxx. Org'"
<amsat-bb@xxxxx.xxx>
Message-ID: <0374E6AA302C458A87ED9475DC7EFD22@xxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
John, here is an alternative often overlooked. Works pretty good for me on a
mast.
http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.htm
l
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of John Geiger
Sent: Monday, December 20, 2010 7:43 PM
To: Amsat-Bb@xxxxx. Org
Subject: [amsat-bb] Elk dualband antenna experiences
How does the Elk Dualband yagi work as a satellite antenna in a base setup
when you are not elevating it? Is it better to mount it for vertical or
horizontal polarization to get maximum coverage of satellite passes? Still
trying to figure out the best FM sat setup here after some station redesign.
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: 8
Date: Tue, 21 Dec 2010 21:40:59 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: "jmfranke" <jmfranke@xxx.xxx>, "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Message-ID: <000d01cba14f$601d1c80$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi John, WA4WDL
On the 2.4 GHz from AO-51 the transmitting polarization is
Linear so that in theory for receiving 2.4 GHz RHCP or LHCP
on the ground station don't make difference.
AO-51 Mode and Antenna Polarization:
T: Linear
V: Linear
U: TX A (usually digital)LHCP
TX B (usually analog) RHCP
L: Linear
S: Linear
73" de
i8CVS Domenico
----- Original Message -----
From: "jmfranke" <jmfranke@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Tuesday, December 21, 2010 8:56 PM
Subject: [amsat-bb] AO-51 S-Band antenna polarization
> Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
> Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
> If so is there a preferred receiving polarization? I have examined the
> AMSAT web site and many references on the Internet, but cannot seem to
find
> the answer.
>
> Thanks,
>
> John WA4WDL AMSAT member 10211
>
>
> _______________________________________________
> 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: 9
Date: Tue, 21 Dec 2010 12:35:51 -0900
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-51 S-Band antenna polarization
To: APBIDDLE@xxxxxxx.xxxx "'jmfranke'" <jmfranke@xxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID: <201012212135.oBLLZqLh048866@xxxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Timely info, as I am going to rebuild my directional satellite array
this week using:
144: M2 2M7 12.4-dBi (vert-pol)
432: M2 436CP24 14-dBic (est.) RHCP (rear half of 436CP42)
2401: L-com Patch 8-dBic RHCP
No L-band
http://www.kl7uw.com/MODSATTWR.jpg
I may add pol switch to the 432 x-yagi later on.
This is my minimized array to lower wind resistance and get a
tracking array back up in mid-winter. I can consider restoring the
fully antenna array next summer when able to lower the tower on
hinge-over base using my pickup truck.
At 11:10 AM 12/21/2010, Alan P. Biddle wrote:
>John,
>
>It is linear. You are right that the information exists, but is sometimes
>not readily available. A good place to look is the Weekly Satellite Report
>which AMSAT distributes. For many, but not all satellites, that information
>is just below the frequency information. For AO-51 we find:
>
>Mode and Antenna Polarization:
>
>V: Linear
>U: TX A (usually digital)LHCP
> TX B (usually analog) RHCP
>L: Linear
>S: Linear
>
>Alan
>WA4SCA
>
>
>
>
>
>
>-----Original Message-----
>From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
>Behalf Of jmfranke
>Sent: Tuesday, December 21, 2010 1:57 PM
>To: amsat-bb@xxxxx.xxx
>Subject: [amsat-bb] AO-51 S-Band antenna polarization
>
>Does anyone know the polarization of the 2.4 GHz transmissions from AO-51.
>Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
>If so is there a preferred receiving polarization? I have examined the
>AMSAT web site and many references on the Internet, but cannot seem to find
>the answer.
>
>Thanks,
>
>John WA4WDL AMSAT member 10211
>
>
>_______________________________________________
>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
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
*temp not in service
------------------------------
Message: 10
Date: Tue, 21 Dec 2010 13:40:27 -0800
From: David Palmer <dave@xxxx.xxx>
Subject: [amsat-bb] Re: Elk dualband antenna experiences
To: Ted <k7trkradio@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<AANLkTinstu1KxMBUumq94szcpaG_ANWd3GU09nrmj9MR@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'll add my two cents.
I've used the Elk exclusively for the last few months operating
"portable" in my backyard (and while camping, etc). The Elk sits on a
photoraphic tripod, and I use a little netbook computer to display the
satellite plot and aim the Elk accordingly. I absolutely love the
antenna, it assembles/disassembles quick, doesn't take up much space,
and has more than enough gain to work all the FM and SSB sats in this
configuration.
What I *have* noticed is that I do have to aim the Elk where the sat
is. If I lower the antenna to horizontal, I notice a significant
fading. That much is to be expected, so if you are in a situation
where you can't elevate the antenna, just aim it up a certain number
of degrees (maybe 15-30 depending on your horizon) so that it's close
enough for low passes, and the high passes (where sat is much closer)
should also work.
As for polarization, I've noticed that I get much better performance
out of the Elk by rotating the antenna to match the polarization of
the satellite at any given instant. I have the PVC mount swivels
fairly loose, so it doesn't take much to flip the antenna back and
forth a little to find the best match. When polarization is matching,
I can have better than S8 sigs, and rotating the polarization 90
degrees will often decrease my sigs to S2 or below. So ... for a
fixed installation, with fixed polarization, you'll likely encounter
some deep fades in the passes, no matter which you choose. So far
I've found that I typically use "almost vertical" polarization
compared to less frequently using "horizontal" polarization, so if I
had to choose between the two, I'd go vertical ... but it may not make
much difference!
One thing I've seen on the lists has been the recommendation to add a
pre-amp to the antenna. Typically people will do this with an Arrow,
since it has separate VHF / UHF outputs so it's easier to config for
preamp. Those that use this method report great results, since the
preamp overcomes much of the signal loss on the UHF downlink. Since
the Elk has a single dual-band output, you may have to look into
duplexers to split out the UHF signal for the preamp.
Hope that helps! That all being said, I've been putting together an
outdoor antenna system over the last few weeks (it's hard to sit in
the rain with the Elk and the twin FT-817's!) ... new system is a 4-el
VHF yagi and 15-el UHF yagi with preamps, on an az-el rotator.
Initial testing seems to indicate that it works pretty well -- so I'm
looking forward to staying dry during satellite contacts for a while!
73 de Dave KB5WIA / CM88
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of John Geiger
> Sent: Monday, December 20, 2010 7:43 PM
> To: Amsat-Bb@xxxxx. Org
> Subject: [amsat-bb] Elk dualband antenna experiences
>
> How does the Elk Dualband yagi work as a satellite antenna in a base setup
> when you are not elevating it? Is it better to mount it for vertical or
> horizontal polarization to get maximum coverage of satellite passes? ?Still
> trying to figure out the best FM sat setup here after some station redesign.
>
> 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
>
>
> _______________________________________________
> 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: 11
Date: Tue, 21 Dec 2010 16:41:12 -0500
From: Martha <martha@xxxxx.xxx>
Subject: [amsat-bb] The Winner
To: AMSAT BB <amsat-bb@xxxxx.xxx>, eschecter@xxxxx.xxx
Message-ID:
<AANLkTinE9NC1c5iQZK9iaUg_sbtRgC9edTo5J-RJbLeh@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Beginning with the $1250 mark, I have picked a donor from the first $250
increment. Eric Schecter is our very first winner. He will have the choice
of an AMSAT clock, hat or golf shirt. Hopefully, there will be more winners
in the near future.
--
73- Martha
------------------------------
Message: 12
Date: Tue, 21 Dec 2010 17:01:37 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Elk dualband antenna experiences
To: David Palmer <dave@xxxx.xxx>
Cc: "Amsat-Bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <4D1123C1.4040500@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 12/21/2010 4:40 PM, David Palmer wrote:
> As for polarization, I've noticed that I get much better performance
> out of the Elk by rotating the antenna to match the polarization of
> the satellite at any given instant.
Absolutely! Even circular downlinks are more elliptical, and have a
preferred polarity. The same principles apply on the uplink too!
See http://www.youtube.com/watch?v=XTqjQ9xIQQE for a 29 second
demonstration of this effect.
73, Drew KO4MA
------------------------------
Message: 13
Date: Tue, 21 Dec 2010 14:42:36 -0800 (PST)
From: John Neeley <w6zkh@xxx.xxx>
Subject: [amsat-bb] Re: Elk dualband antenna experiences
To: David Palmer <dave@xxxx.xxx>, Ted <k7trkradio@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <262336.43538.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I like my Elk yagi also, as like mentioned, breaks down for transportation
quite
nicely. Attached photos are of my Elk yagi carry enclosure. Made from ABS
plumbing materials. I store it in my truck toolbox, along with my HF coils in
another ABS tube so they wont be damaged.
http://i863.photobucket.com/albums/ab199/W6ZKHJOHN/Vacation2009033.jpg
http://i863.photobucket.com/albums/ab199/W6ZKHJOHN/Vacation2009034.jpg
John W6ZKH
DM06
________________________________
From: David Palmer <dave@xxxx.xxx>
To: Ted <k7trkradio@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Sent: Tue, December 21, 2010 1:40:27 PM
Subject: [amsat-bb] Re: Elk dualband antenna experiences
I'll add my two cents.
I've used the Elk exclusively for the last few months operating
"portable" in my backyard (and while camping, etc). The Elk sits on a
photoraphic tripod, and I use a little netbook computer to display the
satellite plot and aim the Elk accordingly. I absolutely love the
antenna, it assembles/disassembles quick, doesn't take up much space,
and has more than enough gain to work all the FM and SSB sats in this
configuration.
What I *have* noticed is that I do have to aim the Elk where the sat
is. If I lower the antenna to horizontal, I notice a significant
fading. That much is to be expected, so if you are in a situation
where you can't elevate the antenna, just aim it up a certain number
of degrees (maybe 15-30 depending on your horizon) so that it's close
enough for low passes, and the high passes (where sat is much closer)
should also work.
As for polarization, I've noticed that I get much better performance
out of the Elk by rotating the antenna to match the polarization of
the satellite at any given instant. I have the PVC mount swivels
fairly loose, so it doesn't take much to flip the antenna back and
forth a little to find the best match. When polarization is matching,
I can have better than S8 sigs, and rotating the polarization 90
degrees will often decrease my sigs to S2 or below. So ... for a
fixed installation, with fixed polarization, you'll likely encounter
some deep fades in the passes, no matter which you choose. So far
I've found that I typically use "almost vertical" polarization
compared to less frequently using "horizontal" polarization, so if I
had to choose between the two, I'd go vertical ... but it may not make
much difference!
One thing I've seen on the lists has been the recommendation to add a
pre-amp to the antenna. Typically people will do this with an Arrow,
since it has separate VHF / UHF outputs so it's easier to config for
preamp. Those that use this method report great results, since the
preamp overcomes much of the signal loss on the UHF downlink. Since
the Elk has a single dual-band output, you may have to look into
duplexers to split out the UHF signal for the preamp.
Hope that helps! That all being said, I've been putting together an
outdoor antenna system over the last few weeks (it's hard to sit in
the rain with the Elk and the twin FT-817's!) ... new system is a 4-el
VHF yagi and 15-el UHF yagi with preamps, on an az-el rotator.
Initial testing seems to indicate that it works pretty well -- so I'm
looking forward to staying dry during satellite contacts for a while!
73 de Dave KB5WIA / CM88
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of John Geiger
> Sent: Monday, December 20, 2010 7:43 PM
> To: Amsat-Bb@xxxxx. Org
> Subject: [amsat-bb] Elk dualband antenna experiences
>
> How does the Elk Dualband yagi work as a satellite antenna in a base setup
> when you are not elevating it? Is it better to mount it for vertical or
> horizontal polarization to get maximum coverage of satellite passes? Still
> trying to figure out the best FM sat setup here after some station redesign.
>
> 73s John AA5JG
> _______________________________________________
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>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 14
Date: Tue, 21 Dec 2010 17:01:43 -0900
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] AO7 modeA???
To: amsat-bb@xxxxx.xxx
Message-ID: <201012220201.oBM21hxj072227@xxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Nothing heard during the 0145z pass (#65.199). Did it not switch?
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
*temp not in service
------------------------------
Message: 15
Date: Wed, 22 Dec 2010 04:51:58 -0800 (PST)
From: Jack Barbera <barberaalderwood@xxxxx.xxx>
Subject: [amsat-bb] FAST 1/2
To: Amsat Reflector <amsat-bb@xxxxx.xxx>
Message-ID: <959866.99024.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Need a little help with FAST 1?& 2.? I have entered all?the informatiion for
the
doppler. SQF file & tried to get on the satellites this morning.? I?was not
able
to get the RF section of the SAT PC 32 program working.? The satellites show
up?on the count down & the Win AOS?windows of the program.? The rotor tracking
part of the program works fine, but the RF section & CAT parts do not list the
down link & up link frequencies.? Can anyone provide a little help as to
what I
may have done wrong or didn't do.
Thanks for any help you may? provide.
?Jack WA1ZDV
------------------------------
Message: 16
Date: Wed, 22 Dec 2010 08:18:28 -0500 (GMT-05:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: FAST 1/2
To: Jack Barbera <barberaalderwood@xxxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<3524474.1293023908959.JavaMail.root@xxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Did you create new lines in the doppler.sqf file with the frequency
information?
73, Drew KO4MA
-----Original Message-----
>From: Jack Barbera <barberaalderwood@xxxxx.xxx>
>Sent: Dec 22, 2010 7:51 AM
>To: Amsat Reflector <amsat-bb@xxxxx.xxx>
>Subject: [amsat-bb] FAST 1/2
>
>Need a little help with FAST 1?& 2.? I have entered all?the informatiion
for the
>doppler. SQF file & tried to get on the satellites this morning.? I?was not
able
>to get the RF section of the SAT PC 32 program working.? The satellites show
>up?on the count down & the Win AOS?windows of the program.? The rotor
tracking
>part of the program works fine, but the RF section & CAT parts do not list
the
>down link & up link frequencies.? Can anyone provide a little help as to
what I
>may have done wrong or didn't do.
>
>Thanks for any help you may? provide.
>?Jack WA1ZDV
>_______________________________________________
>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 5, Issue 507
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