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CX2SA > SATDIG 21.10.10 21:14l 401 Lines 12526 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Polarization Issues (Clint Bradford)
2. vacation/grid trip (wa4hfn@xxxxxxx.xxxx
3. SVHFS 2011 Conference Call For Papers (Robin Midgett)
4. AO-51 pass 10/20/2010 1640z-1649z (Jay Kendall)
5. AO-51 pass 10/20/2010 1640z-1649z should be 2040-2049z
(Jay Kendall)
6. HO-68 pass recording needed. (Tom Schuessler)
7. Re: HO-68 pass recording needed. (Rick - WA4NVM)
8. Re: AMSAT Table/Demo @ Great Lakeshore Super Swap - Oct 16th
(N. Mahdinejad)
----------------------------------------------------------------------
Message: 1
Date: Wed, 20 Oct 2010 17:06:37 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Polarization Issues
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <93F843CA-7B4D-4D7B-B4BE-5AAED470ED65@xxx.xxx>
Content-Type: text/plain; charset=us-ascii
>From my in box ... I will forward all replies to him! Thank you. -Clint
A note on my activity and my station.
I started working SAT the same way I did CW: 3QSOs, 2SATs in a month, a
couple of months in a year... Then the wind suggested to me to reduce
(2x2x11VHF, 4x2x20UHF) the antenna system and I am actually putting up:
- VHF, 2x11 at 45/135deg, lambda spaced, hybrid ring power divider,
0.25lambda delay section (for CP) added on one of the two identical length
cables;
- UHF (will be mounted "next week"), 2x20 at 45/135deg, 2xlambda spaced,
2x0.25lambda air dielectric (vf=1) power divider, delay section (for CP) not
yet determined;
- SHF, 20" dish, offset, 4 turns helical feeder, rirectly connected to low
noise (German) converter; only rx and I am looking to sell it;
The tower atop the roof is 3m high, 1' triangular, with rotor mast offsetted
aside for easy mounting: that is the reason my spacing on 435MHz is so wide,
I need the antennas to be far from the tower as the tower is wide. Single
h/mast on el rotor to support 1xV 1xU each side, dish at center.
Power is 10W (Microwave modules xverter).
My sat are SSB ones, maybe FM too.
Here comes the question.
Circular polarization is hard to achieve; you have to put a delay line
exactly (exactly???) 0.25*Vf, that is 13" on 2M and 4.5" on 435Mhz, in-line
with one coax line of one of the antennas (after the splitter); if you use a
couple of coax connectors 1" error seems easy to achieve. Circular
polarization switching is worst, as 1. if you have an asymmetrical - as
depicted above - inline delay line (on one side only), how long is to be
computed the switching system? and 2. if you choose a symmetrical - either
included in the divider or inline on both antenna cables - solution, how can
you compute correctly the lenghts / difference of lenghts of the needed
(coax, connector, T, relay) items?
So the question is: how have you done your polarization switch (I have seen
SM and PA hams solutions, but no one consider the problem I oulined here)?
And the second part of the question is: do we really need a switching or do
we have a recognized standard - LHCP I think - for our sats?
Thank you for suggestions, If not clear enough I'll clarify on demand, 73s
from
Marco, I4MFA - W4MFA
------------------------------
Message: 2
Date: Thu, 21 Oct 2010 01:33:59 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
Subject: [amsat-bb] vacation/grid trip
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID:
<465990392.116430.1287624839758.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Again thanks to all who made contact with me, I am home and if you need a
card for any of the grids, please email your contact info to?
wa4hfn@xxxxxxx.xxx
WA4HFN Damon
------------------------------
Message: 3
Date: Wed, 20 Oct 2010 13:29:02 -0500
From: Robin Midgett <K4IDC@xxxxxxx.xxx>
Subject: [amsat-bb] SVHFS 2011 Conference Call For Papers
To: amsat-bb@xxxxx.xxx
Message-ID: <201010201829.o9KITBHR029394@xxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"; format=flowed
Call for Papers: 15th Annual Southeastern VHF
Society Conference, Huntsville, Alabama
The Southeastern VHF Society is calling for the
submission of papers and presentations for the
upcoming 15th annual Southeastern VHF Society
Conference to be held in Huntsville, Alabama on
April 29th and 30th, 2011. Papers and
presentations are solicited on both the technical
and operational aspects of VHF, UHF and Microwave
weak signal amateur radio. Some suggested areas of interest are:
Transmitters
Receivers
Transverters
RF Power Amplifiers
RF Low Noise Pre Amplifiers
Antennas
Construction Projects
Test Equipment And Station Accessories
Station Design And Construction
Contesting
Roving
DXpeditions
EME
Propagation (Sporadic E, Meteor Scatter, Troposphere Ducting, etc.)
Digital Modes (WSJT, etc.)
Digital Signal Processing (DSP)
Software Defined Radio (SDR)
Amateur Satellites Amateur Television
In general papers and presentations on non weak
signal related topics such as FM repeaters and
packet will not be accepted but exceptions may be
made if the topic is related to weak signal. For
example, a paper or presentation on the use of
APRS to track rovers during contests would be considered.
The deadline for the submission of papers and
presentations is March 11, 2011. All submissions
for the proceedings should be in Microsoft Word
(.doc). Submissions for presentation at the
conference should be in PowerPoint (.ppt) format,
and delivered on either a USB memory stick or
CDROM or posted for download on a web site of your choice.
Pages are 8 and 1/2 by 11 inches with a 1 inch
margin on the bottom and ? inch margin on the
other three sides. All text, drawings, photos,
etc. should be black and white only (no color).
Please indicate when you submit your paper or
presentation if you plan to attend the conference
and present your paper in person, or if you are
submitting solely for publication. The techncal
program is being handled jointly by Robin Midgett
K4IDC and Steve Kostro, N2CEI. Send all questions
& comments to Robin Midgett K4IDC via K4IDC AT comcast dot net.
Send all presentations to Steve Kostro N2CEI via
SVHFS2011 AT downeastmicrowave DOT com.
For further information about the conference
please go to <http://www.svhfs.org>www.svhfs.org
Thank you,
Robin Midgett K4IDC
2011 Conference Program Co-Chair, SVHFS
------------------------------
Message: 4
Date: Wed, 20 Oct 2010 16:59:37 -0400
From: "Jay Kendall" <jaykendall@xxxxxxx.xxx>
Subject: [amsat-bb] AO-51 pass 10/20/2010 1640z-1649z
To: <amsat-bb@xxxxx.xxx>
Message-ID: <201010202059.o9KKxg5I038215@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I had a recorder failure on this pass, and got nothing. (OK, I forgot to
push the button.)
If anybody has a recording from this time period, please let me know...I'd
really appreciate it!
73,
Jay Kendall, N2JK
jaykendall@xxxxxxx.xxx
------------------------------
Message: 5
Date: Wed, 20 Oct 2010 17:15:00 -0400
From: "Jay Kendall" <jaykendall@xxxxxxx.xxx>
Subject: [amsat-bb] AO-51 pass 10/20/2010 1640z-1649z should be
2040-2049z
To: <amsat-bb@xxxxx.xxx>
Message-ID: <201010202115.o9KLFDYX039156@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
And of course, the technical joys just keep coming...
I meant 2040-2049z.
Maybe I should take up stamp collecting.
73,
Jay Kendall N2JK
--
> I had a recorder failure on this pass, and got nothing. (OK, I forgot to
push the button.)
> If anybody has a recording from this time period, please let me know...I'd
really appreciate it!
------------------------------
Message: 6
Date: Wed, 20 Oct 2010 22:43:04 -0500
From: "Tom Schuessler" <tjschuessler@xxxxxxx.xxx>
Subject: [amsat-bb] HO-68 pass recording needed.
To: <amsat-bb@xxxxx.xxx>
Message-ID: <005e01cb70d2$11f0fc00$35d2f400$@xxx>
Content-Type: text/plain; charset="US-ASCII"
Hello all,
Did anyone manage to get a pass recording of the 16 October 2010 1740
something pass over North America this past Saturday. I was doing demos as
K2BSA/5 at the National Scouting Museum in Irving, TX and with all the
explaining I was doing for onlookers, did not start my recorder. Want to
QSL those we worked.
Thanks much.
Tom Schuessler
2713 Lake Gardens
Irving, TX 75060
<mailto:N5HYP@xxxx.xxx> N5HYP@xxxx.xxx
<mailto:tjschuessler@xxxxxxx.xxx> tjschuessler@xxxxxxx.xxx
<mailto:tschuessler@xxxxxxxxx.xxx> tschuessler@xxxxxxxxx.xxx
------------------------------
Message: 7
Date: Thu, 21 Oct 2010 06:17:46 -0500
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: HO-68 pass recording needed.
To: "Tom Schuessler" <tjschuessler@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <665B9B9F0497498CA08DDAA3B11A63B1@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Tom,
I will send you my copy of the pass. Nice to hear the Boy Scouts on the
birds.
73,
Rick WA4NVM
> Hello all,
>
>
>
> Did anyone manage to get a pass recording of the 16 October 2010 1740
> something pass over North America this past Saturday. I was doing demos
> as
> K2BSA/5 at the National Scouting Museum in Irving, TX and with all the
> explaining I was doing for onlookers, did not start my recorder. Want to
> QSL those we worked.
>
>
>
> Thanks much.
>
>
>
> Tom Schuessler
>
> 2713 Lake Gardens
>
> Irving, TX 75060
>
> <mailto:N5HYP@xxxx.xxx> N5HYP@xxxx.xxx
>
> <mailto:tjschuessler@xxxxxxx.xxx> tjschuessler@xxxxxxx.xxx
>
> <mailto:tschuessler@xxxxxxxxx.xxx> tschuessler@xxxxxxxxx.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: 8
Date: Thu, 21 Oct 2010 13:38:36 +0330
From: "N. Mahdinejad" <n.mahdinejad@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Table/Demo @ Great Lakeshore Super Swap
- Oct 16th
To: amsat-bb@xxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinVvv3t=Cf9==No06XToJcbkUfUKaVt3f7RDzbQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Dear masat MEMBERS.
I HAVE TROUBLE WITH UNITRAC2003, I cant interface it with yaesu
g-5500, my antennas mechanical orientation is east. it means that
when yaesu indoor unit arrows to north=0 my antennas 0 is east, and it
is not accord with any of azimuth formats in unitrac getting started
file. i thinh that it is near to option 4 , this option is true for my
antennas mechanical orientation but it is wrong for yaesu electrical
unit that shows the antennas orientation indoor. e.g. when satellite
in 270 AZ acording to unitrac, my antennas rotate to north but the
azimuth arrow to south in yaesu indoor unit, and i cant recive any
signal.
I dont know what to do? I am really confused.
any help would be gratefully appreciated.
Best Regards.
On 10/16/10, Patrick STODDARD (WD9EWK/VA7EWK) <amsat-bb@xxxxxx.xxx> wrote:
> Hi Doug (and John!)
>
>> There will be an AMSAT table at Holland Amateur Radio Club's Great
>> Lakeshore Super Swap in Holland, MI tomorrow, Saturday Oct 16th. ?My
>> father (John K8YSE) and I (Doug KD8CAO) will be available to discuss
>> AMSAT and demonstrate satellite operation.
>>
>> We will be active on all satellites FM & SSB during the hamfest which
>> runs from 1200z to 1600z (8AM to 12PM local time). In addition to the
>> V/U and U/V satellites, we will be on AO-7 in Mode A. ?We would
>> appreciate your call, especially if you have the ability to work us on
>> Mode A.
>
> Hope to hear you on in the morning. Maybe an SO-50 pass around
> 1430 UTC, or on VO-52 an hour after that. I am not set up for AO-7
> mode A, something I need to work on sometime back home.
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK - Tucson, Arizona
> http://www.wd9ewk.net/
> http://aprs.fi/wd9ewk-7 (to see where I'm at)
>
> _______________________________________________
> 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 420
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