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CX2SA > SATDIG 23.09.08 01:53l 949 Lines 29212 Bytes #999 (0) @ WW
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Sent: 080922/2343Z @:CX2SA.LAV.URY.SA #:35636 [Minas] FBB7.00e $:35636_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Antenna question (James Duffey)
2. Re: Opening up a U110 rotator motor? (Joe)
3. Icom 7000 vs. FT-857 on sats?? (James A. Carmody)
4. The Moon - bit off topic (JoAnne Maenpaa)
5. Re: First impression (JoAnne Maenpaa)
6. Re: Polarity questions (i8cvs)
7. FOR SALE ICOM IC-W32A (Stuart Underwood)
8. AFSK and other cube-sat modes (Jeff Wandling W7BRS)
9. Re: Polarity questions (Joe)
10. Re: The Moon - bit off topic (Greg D.)
11. helix feed for sale (w7lrd(AT)comcast.net)
12. Re: helix feed for sale (Edward Cole)
13. Re: AFSK and other cube-sat modes (Mike Rupprecht)
14. Duplexer for Sats (Stephen Atkins)
15. Re: Duplexer for Sats (Pughkeithd(AT)cs.com)
16. Re: Duplexer for Sats (Ben Jackson)
----------------------------------------------------------------------
Message: 1
Date: Sun, 21 Sep 2008 08:42:00 -0600
From: James Duffey <JamesDuffey(AT)comcast.net>
Subject: [amsat-bb] Re: Antenna question
To: Michael Heim <kd0ar(AT)sbcglobal.net>
Cc: amsat Org <AMSAT-BB(AT)amsat.org>
Message-ID: <34BDE209-4638-4666-865F-15336B1F5E79(AT)comcast.net>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
.
On Sep 21, 2008, at 5:22 AM, Michael Heim wrote:
> My question is, to simplify mounting to a small diameter insulated
> boom, could such an element be placed "laying down", so the element
> could be better supported by drilling 2 holes in the boom?
Michael - W7ZOI built one of the WA5VJB Yagi antennas for 2M using a
driven element oriented just as you describe. He said it worked just
fine.
I think you want the long part of the driven element to be in the same
position in both antennas, but you may want to model it to verify
this. The position is not too critical for 2M.
In Kent's antennas, the position of the driver from the reflector
largely determines the impedance of the antenna, and the position of
the first director from the driven element largely drives the SWR
bandwidth. The gain sort of comes along from these positions for the
three element beam and when there are more than one directors, these
pretty much determine the gain.
They are nice antennas aren't they. I have built and used a half dozen
for various bands and they all work great as built. I use them at the
home station for terrestrial and satellite use, and in the rover. Now
if Kent would only make some longer boom designs available. - Duffey
--
KK6MC
James Duffey
Cedar Crest NM
------------------------------
Message: 2
Date: Sun, 21 Sep 2008 10:53:31 -0500
From: Joe <nss(AT)mwt.net>
Subject: [amsat-bb] Re: Opening up a U110 rotator motor?
To: Doug Faunt N6TQS +1-510-655-8604 <faunt(AT)panix.com>
Cc: amsat-bb(AT)amsat.org
Message-ID: <48D66DFB.5060401(AT)mwt.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
4 1/4-20 screws and that's it, very simple and not much inside
Joe
Doug Faunt N6TQS +1-510-655-8604 wrote:
>Does anyone have information on this? Has it been discussed on
>AMSAT-BB or in the Journal at any time?
>
>If you done it (and put it back together) any hints would be
>appreciated.
>
>73, doug
>_______________________________________________
>Sent via AMSAT-BB(AT)amsat.org. 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: Sun, 21 Sep 2008 10:15:30 -0700 (PDT)
From: "James A. Carmody" <carmodyjim(AT)yahoo.com>
Subject: [amsat-bb] Icom 7000 vs. FT-857 on sats??
To: amsat <amsat-bb(AT)amsat.org>
Message-ID: <637261.22336.qm(AT)web81403.mail.mud.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Any thoughts?? I had been using my FT-817 but it keeps?blowing finals at 5W
out.? Very unreliable.
Jim/nn5o
?James A. Carmody, Attorney & Arbitrator
6363 Woodway, Suite 820
Houston, TX 77057
carmody(AT)lawyer.com
Voice: 713 333 2002 FAX: 713 333 2003
www.carmodylex.com
------------------------------
Message: 4
Date: Sun, 21 Sep 2008 13:39:05 -0500
From: "JoAnne Maenpaa" <k9jkm(AT)comcast.net>
Subject: [amsat-bb] The Moon - bit off topic
To: <amsat-bb(AT)amsat.org>
Message-ID: <000501c91c19$54239cf0$fc6ad6d0$(AT)net>
Content-Type: text/plain; charset="us-ascii"
Hello everyone,
I saw this on the moon-net reflector and posting it here for us space faring
hams to enjoy it also ...
http://sundry.i2phd.com/moon.pps
It's a packaged-up powerpoint slide show featuring the moon.
--
73 de JoAnne K9JKM
k9jkm(AT)amsat.org
------------------------------
Message: 5
Date: Sun, 21 Sep 2008 13:29:57 -0500
From: "JoAnne Maenpaa" <k9jkm(AT)comcast.net>
Subject: [amsat-bb] Re: First impression
To: <amsat-bb(AT)amsat.org>
Message-ID: <000401c91c18$0d4f6670$27ee3350$(AT)net>
Content-Type: text/plain; charset="us-ascii"
> > ..I too am frustrated by the almost complete abscense of
> > any thing related to AMSAT or the satellites coming out
> > of QST....
> We have no one to blame but ourselves if WE miss the opportunity
> to submit articles to QST. They would WELCOME well-written articles
> on the topic.
I might add that CQ-VHF has invited as much satellite and amateur radio in
space articles as we can muster. Below are the CQ-VHF Magazine links for
their issue highlights which provide an abstract of what has been published
in the print magazine. You need to get the paper version for the entire
article and pictures ...
AMSAT's 2007 Space Symposium announcements ...
http://www.cq-vhf.com/2007AMSATSymWint08.html
Get Ready For SuitSat-2 ...
http://www.cq-vhf.com/GetReadyForSuitSpr08.html
The ARRL also published an AMSAT article they felt was more timely on their
amateur radio news & features web rather than waiting for the magazine ...
http://www.arrl.org/news/features/2008/03/05/10005?nc=1
I'm not a born writer but the editor staff at CQ VHF and ARRL polished
everything up after they got my basic article and photos. I'm sure there
are editors standing by for everything else we'd like to tell about
operating satellites!
--
73 de JoAnne K9JKM
k9jkm(AT)amsat.org
------------------------------
Message: 6
Date: Sun, 21 Sep 2008 23:15:51 +0200
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Re: Polarity questions
To: "Angus" <angus(AT)young5769.freeserve.co.uk>, "AMSAT-BB"
<amsat-bb(AT)amsat.org>
Message-ID: <004a01c91c2f$3ac68860$0201a8c0(AT)tin.it>
Content-Type: text/plain; charset="iso-8859-1"
Hi Gus
To know the velocity factor of a coax (known or un-known ) with good
accuracy I make the measurement at about 30 MHz because the velocity
factor do not change with frequency and a low frequency measurement
make the error the smallest as possible.
Get a N coax T and connect the male port of it to the vertical Y channel of
an oscilloscope.
A spectrum analyser is not necessary because any oscilloscope works at
30 MHz
Connect one female port of the T connector to a RF generator and set it
to 30 MHz
If you don't have a RF signal generator use a low power 30 MHz TX at
1 or 2 watt output power or less using few suitable 50 ohm attenuators.
Connect the other female port of the T connector to an estimated 1/4
electrical wave long of coax cable under test and live open the other
end of it.
______________ _______________
| | | 30 MHz |
| Oscilloscope | | signal generator |
| | | or low power TX |
|___________Y_ | |_______________|
1/4 Lambda /\| \/
open o------------|------------------------|
end T connector
If you suspect that the velocity factor is 0.66 like for solid polyethylene
(PE) make the 1/4 electrical wave at 30 MHz 1.65 meters i.e. 65" long
The measurement plane of the coax cable under test is the middle of
the T connector just between both female ports where the generator
and the coax under test get in contact each other so that the real lenght
of 1/4 electrical lenght must be taken from the above measurement
plane including the male N connector up to the open end of it.
Because of the theory of transmission line and following the Smith
Chart we see that a 1/4 electrical wave long transmission line becames
a short circuit at his resonating frequency when the other end of it is
open.
While looking at the CRT of the oscilloscope adjust the frequency
of the signal generator until the amplitude of the signal on the CRT
falls abruptly to zero.
The frequency shown by the signal generator is the resonant frequency
of the 1/4 electrical wave.
Knowing the frequency and the physical lenght of 1/4 wave it is
easy to calculate the real velocity factor of the coax cable under test.
No special instruments are necessary because about everyone own a
signal generator for 30 MHz and a CRT oscilloscope.
Using a GDO or an antenna analyser the measurement can be wrong
because it is difficult to know if the above instruments made for
amateur use are well calibrated or not.
73" de
i8CVS Domenico
----- Original Message -----
From: "Angus" <angus(AT)young5769.freeserve.co.uk>
To: <AMSAT-BB(AT)amsat.org>
Sent: Sunday, September 21, 2008 7:57 AM
Subject: [amsat-bb] Re: Polarity questions
> Hmmmmm might get shot down in flames for this but.
>
> If you want to know the velocity factor of a coax (known or un-known) try
> getting two eaqual lengths of coax which are physically 1/4wavelength long
> i.e. 50cms for 2mtrs.
> Short out ONE end (join the inner and outers together with a short a link
as
> possible) and do this for both pieces of coax.
> We are going to make a coaxial dipole so these two shortened ends go on to
a
> piece of feeder (try and keep this feeder as short as possible also but
the
> dipole needs to be somewhere clear but does not to be 100 feet up either).
> Yes you will need to support the dipole elements as they will just hang
down
> so perhaps a piece of garden cane or some other RF invisible material.
> Trim back both OPEN ends of the dipole until you get the lowest possible
> VSWR (on the centre frequency you want to use) and you should have very
> close to an electrically 1/2wave dipole for the coax you used (each side
of
> the dipole will be a 1/4 wave long). You can use these figures for making
a
> 1/4wave delay line or if your making a polarity control box you will need
to
> know the lengths of both 1/2 and 1/4 of the coax you are going to use, the
> dipole will be considerably shorter than a normal wire dipole for the same
> frequency because we have used the velocity factor to help reduce its
> length.
>
> If you think that the feeder you have used is radiating either do perhaps
6
> turns around a small 1" tube to make a balun at the feedpoint or alter the
> length of the feeder slightly, if theVSWR alters when you change the
length
> of the feeder then the feeder is radiating.
>
> My two pennys worth, should help you get very close to the figures you
need
> without the use of a GDO or an antenna analyser.
>
> regards
> Gus
>
>
> --
> I am using the free version of SPAMfighter for home users.
> SPAMfighter has removed 3111 spam emails to date.
> Paying users do not have this message in their emails.
> Get the free SPAMfighter here: http://www.spamfighter.com/len
>
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: Sun, 21 Sep 2008 17:58:18 -0700 (PDT)
From: Stuart Underwood <w8stu(AT)att.net>
Subject: [amsat-bb] FOR SALE ICOM IC-W32A
To: AMSAT-BB(AT)amsat.org
Message-ID: <124179.59083.qm(AT)web83812.mail.sp1.yahoo.com>
Content-Type: text/plain; charset=us-ascii
I
have for sale a mint W32A.. It looks like it just came from the store.
That's how nice of shape it is in. This is a 2m/70cm HT. Comes with
radio, stock antenna, wal-wart, manual, HT case, and box. Pix on request. I
am asking
$225.00 shipped. Paypal or postal money order. If interested please
call 440-639-9547 anytime after 3:00 PM EST or email w8stu(AT)arrl.net
Thanks in advance. 73, Stuart W8STU
------------------------------
Message: 8
Date: Sun, 21 Sep 2008 18:35:53 -0700 (PDT)
From: Jeff Wandling W7BRS <jw(AT)w7brs.com>
Subject: [amsat-bb] AFSK and other cube-sat modes
To: amsat-bb(AT)amsat.org
Message-ID: <alpine.DEB.0.82.0809211831560.19442(AT)almond.he.net>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
I'm reluctant to post this question because it may be a frequently asked
question, but my searches are not yielding good results.
I have been searching the net for a Windows program that can decode
AFSK and other typical cube-sat downlink telemetry.
I've used programs like DigiPan, WinPSK, etc.. and either I don't have
them configured or they don't decode AFSK, X.25, and other nominal
cube-sat downlink telemetry.
Help.. Where do I get Windows based software to do this ?
I'm using a RigBlaster-Plus with IC-910.
Thanks,
-jeff
DE W7BRS
------------------------------
Message: 9
Date: Sun, 21 Sep 2008 19:19:24 -0500
From: Joe <nss(AT)mwt.net>
Subject: [amsat-bb] Re: Polarity questions
To: i8cvs <domenico.i8cvs(AT)tin.it>
Cc: AMSAT-BB <amsat-bb(AT)amsat.org>, Angus
<angus(AT)young5769.freeserve.co.uk>
Message-ID: <48D6E48C.9040302(AT)mwt.net>
Content-Type: text/plain; charset=us-ascii; format=flowed
Howdy all,
I Have a question,,
Will the below set up work with 300 ohm TV type of twin lead?
Joe WB9SBD
i8cvs wrote:
>Hi Gus
>
>To know the velocity factor of a coax (known or un-known ) with good
>accuracy I make the measurement at about 30 MHz because the velocity
>factor do not change with frequency and a low frequency measurement
>make the error the smallest as possible.
>
>Get a N coax T and connect the male port of it to the vertical Y channel of
>an oscilloscope.
>
>A spectrum analyser is not necessary because any oscilloscope works at
>30 MHz
>
>Connect one female port of the T connector to a RF generator and set it
>to 30 MHz
>
>If you don't have a RF signal generator use a low power 30 MHz TX at
>1 or 2 watt output power or less using few suitable 50 ohm attenuators.
>
>Connect the other female port of the T connector to an estimated 1/4
>electrical wave long of coax cable under test and live open the other
>end of it.
>
> ______________ _______________
> | | | 30 MHz |
> | Oscilloscope | | signal generator |
> | | | or low power TX |
> |___________Y_ | |_______________|
>1/4 Lambda /\| \/
>open o------------|------------------------|
> end T connector
>
>
>If you suspect that the velocity factor is 0.66 like for solid polyethylene
>(PE) make the 1/4 electrical wave at 30 MHz 1.65 meters i.e. 65" long
>
>The measurement plane of the coax cable under test is the middle of
>the T connector just between both female ports where the generator
>and the coax under test get in contact each other so that the real lenght
>of 1/4 electrical lenght must be taken from the above measurement
>plane including the male N connector up to the open end of it.
>
>Because of the theory of transmission line and following the Smith
>Chart we see that a 1/4 electrical wave long transmission line becames
>a short circuit at his resonating frequency when the other end of it is
>open.
>
>While looking at the CRT of the oscilloscope adjust the frequency
>of the signal generator until the amplitude of the signal on the CRT
>falls abruptly to zero.
>
>The frequency shown by the signal generator is the resonant frequency
>of the 1/4 electrical wave.
>
>Knowing the frequency and the physical lenght of 1/4 wave it is
>easy to calculate the real velocity factor of the coax cable under test.
>
>No special instruments are necessary because about everyone own a
>signal generator for 30 MHz and a CRT oscilloscope.
>
>Using a GDO or an antenna analyser the measurement can be wrong
>because it is difficult to know if the above instruments made for
>amateur use are well calibrated or not.
>
>73" de
>
>i8CVS Domenico
>
>----- Original Message -----
>From: "Angus" <angus(AT)young5769.freeserve.co.uk>
>To: <AMSAT-BB(AT)amsat.org>
>Sent: Sunday, September 21, 2008 7:57 AM
>Subject: [amsat-bb] Re: Polarity questions
>
>
>
>
>>Hmmmmm might get shot down in flames for this but.
>>
>>If you want to know the velocity factor of a coax (known or un-known) try
>>getting two eaqual lengths of coax which are physically 1/4wavelength long
>>i.e. 50cms for 2mtrs.
>>Short out ONE end (join the inner and outers together with a short a link
>>
>>
>as
>
>
>>possible) and do this for both pieces of coax.
>>We are going to make a coaxial dipole so these two shortened ends go on to
>>
>>
>a
>
>
>>piece of feeder (try and keep this feeder as short as possible also but
>>
>>
>the
>
>
>>dipole needs to be somewhere clear but does not to be 100 feet up either).
>>Yes you will need to support the dipole elements as they will just hang
>>
>>
>down
>
>
>>so perhaps a piece of garden cane or some other RF invisible material.
>>Trim back both OPEN ends of the dipole until you get the lowest possible
>>VSWR (on the centre frequency you want to use) and you should have very
>>close to an electrically 1/2wave dipole for the coax you used (each side
>>
>>
>of
>
>
>>the dipole will be a 1/4 wave long). You can use these figures for making
>>
>>
>a
>
>
>>1/4wave delay line or if your making a polarity control box you will need
>>
>>
>to
>
>
>>know the lengths of both 1/2 and 1/4 of the coax you are going to use, the
>>dipole will be considerably shorter than a normal wire dipole for the same
>>frequency because we have used the velocity factor to help reduce its
>>length.
>>
>>If you think that the feeder you have used is radiating either do perhaps
>>
>>
>6
>
>
>>turns around a small 1" tube to make a balun at the feedpoint or alter the
>>length of the feeder slightly, if theVSWR alters when you change the
>>
>>
>length
>
>
>>of the feeder then the feeder is radiating.
>>
>>My two pennys worth, should help you get very close to the figures you
>>
>>
>need
>
>
>>without the use of a GDO or an antenna analyser.
>>
>>regards
>>Gus
>>
>>
>>--
>>I am using the free version of SPAMfighter for home users.
>>SPAMfighter has removed 3111 spam emails to date.
>>Paying users do not have this message in their emails.
>>Get the free SPAMfighter here: http://www.spamfighter.com/len
>>
>>
>>
>>_______________________________________________
>>Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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: 10
Date: Sun, 21 Sep 2008 17:21:34 -0700
From: "Greg D." <ko6th_greg(AT)hotmail.com>
Subject: [amsat-bb] Re: The Moon - bit off topic
To: <amsat-bb(AT)amsat.org>
Message-ID: <BLU133-W15DD86EFEA4C3372F41A11A94B0(AT)phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
Beautiful pictures, JoAnne,
But, does it bother anyone else when they see a really nice sunrise or sunset
picture, with a full moon close by? Then, when I point it out to someone,
they don't think anything of it.
Don't the laws of physics mean anything anymore? Photoshop needs to modify
their EULA to make this sort of stuff illegal.
Greg KO6TH
----------------------------------------
> From: k9jkm(AT)comcast.net
> To: amsat-bb(AT)amsat.org
> Date: Sun, 21 Sep 2008 13:39:05 -0500
> Subject: [amsat-bb] The Moon - bit off topic
>
> Hello everyone,
>
> I saw this on the moon-net reflector and posting it here for us space faring
> hams to enjoy it also ...
>
> http://sundry.i2phd.com/moon.pps
>
> It's a packaged-up powerpoint slide show featuring the moon.
>
> --
> 73 de JoAnne K9JKM
> k9jkm(AT)amsat.org
>
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
_________________________________________________________________
Get more out of the Web. Learn 10 hidden secrets of Windows Live.
http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-
cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008
------------------------------
Message: 11
Date: Mon, 22 Sep 2008 06:44:32 +0000
From: w7lrd(AT)comcast.net
Subject: [amsat-bb] helix feed for sale
To: AMSAT-BB(AT)amsat.org (AMSAT-BB)
Message-ID:
<092220080644.9360.48D73ED0000BBE210000249022165579960B9D04C999(AT)comca
st.net>
Content-Type: text/plain
Hello
I have an extra helix feed available on Ebay.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110291240601&ssPageNam
e=STRK:MESE:IT&ih=001
73 Bob W7LRD
------------------------------
Message: 12
Date: Mon, 22 Sep 2008 02:18:00 -0800
From: Edward Cole <kl7uw(AT)acsalaska.net>
Subject: [amsat-bb] Re: helix feed for sale
To: w7lrd(AT)comcast.net, AMSAT-BB(AT)amsat.org (AMSAT-BB)
Message-ID: <200809221018.m8MAI1X9063681(AT)iris.acsalaska.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Hey, Bob,
Does RCA know you stold their mascot? I suppose the dog is not part
of the offer? Nice looking antenna!
73, Ed - KL7UW
At 10:44 PM 9/21/2008, w7lrd(AT)comcast.net wrote:
>Hello
>I have an extra helix feed available on Ebay.
>http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110291240601&ssPageNa
me=STRK:MESE:IT&ih=001
>73 Bob W7LRD
>_______________________________________________
>Sent via AMSAT-BB(AT)amsat.org. 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: 13
Date: Mon, 22 Sep 2008 13:36:57 +0200
From: "Mike Rupprecht" <mail(AT)mike-rupprecht.de>
Subject: [amsat-bb] Re: AFSK and other cube-sat modes
To: "'Jeff Wandling W7BRS'" <jw(AT)w7brs.com>
Cc: AMSAT-BB(AT)amsat.org
Message-ID: <000601c91ca7$85719760$9054c620$(AT)de>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jeff,
At thi9s moment there are 2 types of 1k2 AFSK transmission from satellites:
1) Telemetry in UI-Frames (like COMPASS-1, SEEDS, CUTE1.7APD-II) and
2) Telemetry in RAW AX.25 frames (AO-27)
For the first satellites you can use standard soundcard software for packet
radio (UI-View, MixW etc.) to decode the frame headers.
But for both cases you need an KISS file to decode the telemetry values.
There is a lot of telemetry decoding software on my website based on *.kss
files. See here: www.dk3wn.info/software.shtml
You can find also a special software to produce an KISS files with
AGW-Packet Engine (it's a really new BETA version).
If you have any question, please don't hesitate to ask me.
73, Mike
DK3WN
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org] Im
Auftrag von Jeff Wandling W7BRS
Gesendet: Montag, 22. September 2008 03:36
An: amsat-bb(AT)amsat.org
Betreff: [amsat-bb] AFSK and other cube-sat modes
I'm reluctant to post this question because it may be a frequently asked
question, but my searches are not yielding good results.
I have been searching the net for a Windows program that can decode
AFSK and other typical cube-sat downlink telemetry.
I've used programs like DigiPan, WinPSK, etc.. and either I don't have
them configured or they don't decode AFSK, X.25, and other nominal
cube-sat downlink telemetry.
Help.. Where do I get Windows based software to do this ?
I'm using a RigBlaster-Plus with IC-910.
Thanks,
-jeff
DE W7BRS
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Message: 14
Date: Mon, 22 Sep 2008 08:28:03 -0600
From: Stephen Atkins <satkins(AT)inetdesign.org>
Subject: [amsat-bb] Duplexer for Sats
To: amsat-bb(AT)amsat.org
Message-ID: <48D7AB73.2020806(AT)inetdesign.org>
Content-Type: text/plain; charset=ISO-8859-1
Hello everyone. I've worked AO-51 a few times so I'm not a total
newbie. Just joined the list here to ask about building my own duplexer
for working the sats. Awhile ago I found a page that described how to
build one using a pencil to wind the inductors. It was a really small
duplexer using RG-174 and SMC connectors. Does anyone know where I
might find this web page? Or have instructions for building a duplexer?
Thanks
--
Stephen Atkins
VE6CPU
------------------------------
Message: 15
Date: Mon, 22 Sep 2008 11:53:45 EDT
From: Pughkeithd(AT)cs.com
Subject: [amsat-bb] Re: Duplexer for Sats
To: satkins(AT)inetdesign.org
Cc: amsat-bb(AT)amsat.org, w5iu(AT)swbell.net
Message-ID: <d0b.347a2e64.36091989(AT)cs.com>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 9/22/2008 10:41:01 AM Central Daylight Time,
satkins(AT)inetdesign.org writes:
> Subj: [amsat-bb] Duplexer for Sats
> Date:9/22/2008 10:41:01 AM Central Daylight Time
> From:satkins(AT)inetdesign.org
> To:amsat-bb(AT)amsat.org
> Received from Internet:
>
>
>
> Hello everyone. I've worked AO-51 a few times so I'm not a total
> newbie. Just joined the list here to ask about building my own duplexer
> for working the sats. Awhile ago I found a page that described how to
> build one using a pencil to wind the inductors. It was a really small
> duplexer using RG-174 and SMC connectors. Does anyone know where I
> might find this web page? Or have instructions for building a duplexer?
>
> Thanks
> --
> Stephen Atkins
> VE6CPU
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
>
Stephen,
Check this out: http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf
A duplexer is built as part of the antenna combination, but could be done
separately if necessary. Any 50 ohm coax and connectors could be used. This
one
does feature inductors wound on a pencil.
73 - Keith, W5IU
------------------------------
Message: 16
Date: Mon, 22 Sep 2008 12:03:09 -0400
From: Ben Jackson <bbj(AT)innismir.net>
Subject: [amsat-bb] Re: Duplexer for Sats
To: Stephen Atkins <satkins(AT)inetdesign.org>
Cc: amsat-bb(AT)amsat.org
Message-ID: <48D7C1BD.2090003(AT)innismir.net>
Content-Type: text/plain; charset=ISO-8859-1
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Hash: SHA1
Stephen Atkins wrote:
> Hello everyone. I've worked AO-51 a few times so I'm not a total
> newbie. Just joined the list here to ask about building my own duplexer
> for working the sats. Awhile ago I found a page that described how to
> build one using a pencil to wind the inductors. It was a really small
> duplexer using RG-174 and SMC connectors. Does anyone know where I
> might find this web page? Or have instructions for building a duplexer?
If you feel comfortable with your soldering skills, perhaps you may want
to check out these:
http://www.k0lee.com/duplexer.htm
Small, well designed, and they work. A friend and I used them on a
homebrew Arrow clone we made with moderate success. (The issues we had
may or may not be the fault of the diplexer)
- --
Ben Jackson - N1WBV - New Bedford, MA
bbj <at> innismir.net - http://www.innismir.net/
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------------------------------
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