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CX2SA > SATDIG 05.06.12 21:09l 1023 Lines 33945 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V7 180
Path: IZ3LSV<IK2XDE<ON4HU<CX2SA
Sent: 120605/1909Z @:CX2SA.SAL.URY.SA #:61074 [Salto] FBB7.00e $:AMSATBB7180
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Hamvention Balloon Launch with SSTV (Farrell Winder)
2. Re: AMSAT-BB Digest, Vol 7, Issue 179 (tokens@xxxxxxx.xxxx
3. Re: Transit of Venus event 5/6 June (Bob Bruninga )
4. Re: Transit of Venus event 5/6 June (DSTAR) (Bob Bruninga )
5. Re: PA5RWE passed away (William Leijenaar)
6. STRaND-2 and OSCAR-5 in SatMagazine (Trevor .)
----------------------------------------------------------------------
Message: 1
Date: Mon, 4 Jun 2012 15:50:46 -0400
From: "Farrell Winder" <fwinder@xxxx.xxx>
To: "AMSAT" <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Hamvention Balloon Launch with SSTV
Message-ID: <67CEFDD8DE074371B54DEA31C14090C3@xxxxxxxxx>
Content-Type: text/plain; charset="Windows-1252"
ALL,
During this years Hamvention, Bill Brown, WB8ELK launched a balloon
carrying data packages of APRS on 144.39, other data on 144.34 and SSTV ,
Scottie S2 on 147.56Mhz.. Did anyone copy the balloon SSTV and record
pictures? If any pictures are available please forward to me and I will
resend to Bill. I would have tried to copy but missed all of the
Hamvention being out of town for a Grandson's graduation.
Many thanks for any picture copies or info on anyone who did copy.
Farrell Winder, W8ZCF , Cincinnati.
------------------------------
Message: 2
Date: Mon, 4 Jun 2012 17:44:45 -0400
From: <tokens@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 7, Issue 179
Message-ID: <54A00C0294AC4F5AB6B6B3EEE7C86E8D@xxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Just checked again and actually I have HI confirmed on 6 and I worked that
ZF before on 6, no QSL.
KHP
-----Original Message-----
From: amsat-bb-request@xxxxx.xxx
Sent: Monday, June 04, 2012 3:00 PM
To: amsat-bb@xxxxx.xxx
Subject: AMSAT-BB Digest, Vol 7, Issue 179
Send AMSAT-BB mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of AMSAT-BB digest..."
Today's Topics:
1. Re: Icom Power Cord (Clint Bradford)
2. A great suggestion (Thomas Doyle)
3. 1K grids (Bruce)
4. Re: full duplex w/ 2 HT's (Ronald Nutter)
5. Re: full duplex w/ 2 HT's (Greg D)
6. Re: A great suggestion (Clint Bradford)
7. Re: European Lunar Lander - Call for Declarations (Stefan Wagener)
8. Re: European Lunar Lander - Call for Declarations (i8cvs)
9. Re: European Lunar Lander - Call for Declarations
(Jari Koivurinne)
10. Re: full duplex w/ 2 HT's (Andrew Glasbrenner)
11. nitinol wire vs steel tape (Nick Pugh)
12. Re: full duplex w/ 2 HT's (Dobarrows)
13. Re: [CubeSat] nitinol wire vs steel tape (chantal cappelletti)
----------------------------------------------------------------------
Message: 1
Date: Sun, 3 Jun 2012 12:57:42 -0700
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Icom Power Cord
Message-ID: <095A1B02-67B6-40A6-AE56-2B533CEF27D9@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I believe the IC-910 also uses the IC-OPC-657A power cord - if that helps in
your searching.
Clint K6LCS
>> ... IC-821 ...
------------------------------
Message: 2
Date: Sun, 3 Jun 2012 15:59:58 -0500
From: Thomas Doyle <tomdoyle1948@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] A great suggestion
Message-ID:
<CAHnRQRKmTZgvrezjAEPOu=KW2QQmeD07=sAh_nE5+q+TbhANfQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
A great suggestion was made for a simple addition to the
program written for demos and education.
You can now add your own images to the little slide show that takes
place in the lower right hand portion of the screen. This is a good
way to personalize your presentation by including images that
are of specific interest to your group or add images that for one
reason or another are not included in the program.
If any group or organization would like an image added to the gallery
and/or included with the program distribution just send me your request
in an email with the image attached and I will try to include it. If any
registered trademark or copyright issues are involved with the image
simply add a line or two to your request authorizing use of the image
in this application.
The updated version of the program, information on how to add your
own images and a little gallery of images to try out is on the
web site.
http://www.tomdoyle.org/simplesatlookdown
Have Fun - 73 W9KE Tom Doyle
------------------------------
Message: 3
Date: Sun, 3 Jun 2012 14:31:02 -0700 (PDT)
From: Bruce <kk5do@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] 1K grids
Message-ID:
<1338759062.77954.YahooMailMobile@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Congrats to Jerry, K5OE. He just submitted his VUCC upgrade to 1,000 grids
today, actually 1,008 but who's counting.
It was an easy set of cards to check. About 30 from a bunch of hams and 100
or so grids from Yuri. Not a bad haul. and... I have never worked Yuri on
satellite.
73...bruce
Sent from my iPhone
------------------------------
Message: 4
Date: Sun, 03 Jun 2012 16:17:07 -0500
From: Ronald Nutter <ron.nutter@xxxxxxxxxx.xxx>
To: Robert Coppock <robertinorbit@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: full duplex w/ 2 HT's
Message-ID: <4FCBD453.3000401@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Robert:
I have used a duplexer on the UHF side of my satellite ops for several
years. I find that some radios have more of a desense problem than
others. Here is a link to my website where I briefly talk about what I
do on portable ops and using what is referred to as a Mode J filter -
http://www.ka4kyi.com/satellite_gear/misc_equipment/
Ron Nutter
KA4KYI
AMSAT Area Coordinator for Missouri
On 6/2/12 11:33 AM, Robert Coppock wrote:
>
>
>
> hola, i am trying to determine the best way to work full duplex on the
> birds with 2 HT's or radios. i cannot find any info so far on the web.
> my concern is to keep the transmit power out of the receive radio, i guess
> basically the difference between a diplexer and duplexer. since i am
> efficient (lazy) i thought i would just look for suggestions here while i
> am checking google also. what do i need, di/du/ plexer, and what is the
> correct wiring scheme ? i will be using the arrow antenna without the
> built in duplexer, from the 2 feeds (vhf/uhf) and 2 HT's for now. my
> picture of it so far, is to wire the vhf radio direct to the vhf feed port
> on the arrow, and have the uhf port on the arrow come into a duplexer,
> with the duplexer uhf port going to the uhf radio, and the duplexer vhf
> port terminated into a 50 ohm dummy load. also, any suggestions of
> specific duplexers would be appreciated. i think i started on this project
> a few years ago, but never got around to get!
ti!
> ng it all together. grazie mille, Robert k f 0 g cn81 in the
> woodwork, literally,
> shasta/klamath national forests.
> _______________________________________________
> 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, 03 Jun 2012 19:45:36 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: full duplex w/ 2 HT's
Message-ID: <4FCC2150.6050608@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
So, all the on-line information seems to point to this solution -
putting a diplexer (filter) on the 70cm side to tap off and absorb the
incoming 2m signal. Isn't there also a design where one puts a filter on
the 2m side, to tap off and absorb the 70 cm (3rd harmonic of 2m) signal?
I would think that any (reasonable) 70cm receiver would have enough
rejection for a signal so far out of band, but the in-band 3rd harmonic
can only be taken care of at its source. At least, I think that's the logic.
Is there anything worthy about the other design, or is the most common
problem that our HTs can't possibly deal with a strong 2m signal on the
70cm side because of their "DC to Daylight" receivers?
I've been on the mode-J birds without much of a problem with this sort
of desense, though I did have a lot of trouble on AO-40 with reflected
RF when aiming through a big oak tree behind the house. The 70cm uplink
was interfering with the 13cm downlink, and I was pretty sure at the
time that it was a 3rd harmonic sort of problem.
Just curious,
Greg KO6TH
Ronald Nutter wrote:
> Robert:
>
> I have used a duplexer on the UHF side of my satellite ops for several
> years. I find that some radios have more of a desense problem than
> others. Here is a link to my website where I briefly talk about what I
> do on portable ops and using what is referred to as a Mode J filter -
> http://www.ka4kyi.com/satellite_gear/misc_equipment/
>
> Ron Nutter
> KA4KYI
> AMSAT Area Coordinator for Missouri
>
> On 6/2/12 11:33 AM, Robert Coppock wrote:
>>
>>
>>
>> hola, i am trying to determine the best way to work full duplex on
>> the birds with 2 HT's or radios. i cannot find any info so far on the
>> web. my concern is to keep the transmit power out of the receive
>> radio, i guess basically the difference between a diplexer and
>> duplexer. since i am efficient (lazy) i thought i would just look for
>> suggestions here while i am checking google also. what do i need,
>> di/du/ plexer, and what is the correct wiring scheme ? i will be
>> using the arrow antenna without the built in duplexer, from the 2
>> feeds (vhf/uhf) and 2 HT's for now. my picture of it so far, is to
>> wire the vhf radio direct to the vhf feed port on the arrow, and have
>> the uhf port on the arrow come into a duplexer, with the duplexer uhf
>> port going to the uhf radio, and the duplexer vhf port terminated
>> into a 50 ohm dummy load. also, any suggestions of specific duplexers
>> would be appreciated. i think i started on this project a few years
>> ago, but never got around to get!
> ti!
>> ng it all together. grazie mille, Robert k f 0 g cn81 in the
>> woodwork, literally, shasta/klamath national forests.
>> _______________________________________________
>> 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: 6
Date: Sun, 03 Jun 2012 20:27:33 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A great suggestion
Message-ID: <65DC0D43-E6E0-441C-A8FA-8E9792B44E24@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
Brilliant! Great program ... accurate tracking ... simple and elegant -
GREAT work, Tom.
Clint Bradford K6LCS
http://www.work-sat.com
------------------------------
Message: 7
Date: Mon, 4 Jun 2012 02:26:20 -0500
From: Stefan Wagener <wageners@xxxxx.xxx>
To: i8cvs <domenico.i8cvs@xxx.xx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Message-ID:
<CAKu8kHCN5PQZmbDjYeqWnZcarjVi2g-qRiwueQ=uKYSt-pkPfw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Thanks folks,
That's a very helpful and constructive discussion. It will certainly allow
for better assessment of the feasibility, options and limitations.
Stefan, VE4NSA
On Sat, Jun 2, 2012 at 8:54 PM, i8cvs <domenico.i8cvs@xxx.xx> wrote:
> Hi Peter, DB2OS
>
> I was reading the document in particular point 2.2.2
> Communication and 2.2.3 but in my opinion the Radio
> Hams are off side because everyting has been already
> designed and in my opinion there is no room available
> on the Lander for a Moon-Earth experimental communication
> transponder in our L band and S band because our antennas
> are too big.
>
> Since the main 7.2 and 8.5 GHz X band High Gain Antennas
> of the Lander are oriented toward the Earth in a fixed position
> to compensate the pointing for libration probably only a 5 watt
> pep and a circularly polarized horn on our 10.5 GHz should be
> possible.
>
> 73" de
>
> i8CVS Domenico
>
> ----- Original Message -----
> From: "Peter Guelzow" <peter.guelzow@xxxxxx.xx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Sunday, June 03, 2012 12:57 AM
> Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
>
> Hi together,
>
> Please also have a look at this document:
>
>
> http://wsn.spaceflight.esa.int/docs/lunarlander/LunarLander_EIDA_CDI_230512.
> pdf
>
> in particular see point 2.2.2 Communication and 2.2.3:
>
> "Visibility of the Earth from the landing site imposes the following
> constraint:
> ? communications shall only be possible within a 13.7 day (TBC) window
> each month, and shall depend on the availability of the ground station."
>
> further:
>
> "the mean power available for an individual payload is expected not to
> exceed 20W"
>
> 73s Peter DB2OS
>
> On 03.06.2012 00:29, Peter Guelzow wrote:
>
> > Check also this discussion from James Miller, G3RUH:
> >
> > http://www.amsat.org/amsat/articles/g3ruh/110.html
> >
> >
> > 73s Peter, DB2OS
>
> _______________________________________________
> 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: Mon, 4 Jun 2012 10:01:14 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Stefan Wagener" <wageners@xxxxx.xxx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Message-ID: <000001cd4228$79df1300$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="Windows-1252"
Hi Stefan VE4NSA, Peter DB2OS and folks on BB
It should be very nice to have a transponder on the Lunar Lander operating
into the X/K band 10,5 GHz Uplink and 24 GHz downlink. As on AO40 the
antennas are very small and probably there is room for a transponder.
For a good feasibility and assesment with ESA it would be very important to
have also a 24 GHz Beacon relaying to us TLM data concerning some primary
ESA experiments.
Just my idea.
73" de
i8CVS Domenico
----- Original Message -----
From: Stefan Wagener
To: i8cvs
Cc: Peter Guelzow ; Amsat - BBs
Sent: Monday, June 04, 2012 9:26 AM
Subject: Re: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Thanks folks,
That's a very helpful and constructive discussion. It will certainly allow
for better assessment of the feasibility, options and limitations.
Stefan, VE4NSA
On Sat, Jun 2, 2012 at 8:54 PM, i8cvs <domenico.i8cvs@xxx.xx> wrote:
Hi Peter, DB2OS
I was reading the document in particular point 2.2.2
Communication and 2.2.3 but in my opinion the Radio
Hams are off side because everyting has been already
designed and in my opinion there is no room available
on the Lander for a Moon-Earth experimental communication
transponder in our L band and S band because our antennas
are too big.
Since the main 7.2 and 8.5 GHz X band High Gain Antennas
of the Lander are oriented toward the Earth in a fixed position
to compensate the pointing for libration probably only a 5 watt
pep and a circularly polarized horn on our 10.5 GHz should be
possible.
73" de
i8CVS Domenico
----- Original Message -----
From: "Peter Guelzow" <peter.guelzow@xxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, June 03, 2012 12:57 AM
Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Hi together,
Please also have a look at this document:
http://wsn.spaceflight.esa.int/docs/lunarlander/LunarLander_EIDA_CDI_230512.
pdf
in particular see point 2.2.2 Communication and 2.2.3:
"Visibility of the Earth from the landing site imposes the following
constraint:
? communications shall only be possible within a 13.7 day (TBC) window
each month, and shall depend on the availability of the ground station."
further:
"the mean power available for an individual payload is expected not to
exceed 20W"
73s Peter DB2OS
On 03.06.2012 00:29, Peter Guelzow wrote:
> Check also this discussion from James Miller, G3RUH:
>
> http://www.amsat.org/amsat/articles/g3ruh/110.html
>
>
> 73s Peter, DB2OS
_______________________________________________
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: Mon, 4 Jun 2012 11:32:38 +0300
From: "Jari Koivurinne" <jari.koivurinne@xxxx.xxx>
To: "i8cvs" <domenico.i8cvs@xxx.xx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Message-ID:
<e4cf25caf059daa81574d170077e930e.squirrel@xxxxxxx.xxxx.xxx>
Content-Type: text/plain;charset=iso-8859-1
Hi all
There is nothing much to do with 20W mean power. Just a 5W pep beacon...
-jari oh3uw
> Hi Stefan VE4NSA, Peter DB2OS and folks on BB
>
> It should be very nice to have a transponder on the Lunar Lander operating
> into the X/K band 10,5 GHz Uplink and 24 GHz downlink. As on AO40 the
> antennas
> are very small and probably there is room for a transponder.
>
> For a good feasibility and assesment with ESA it would be very important
> to
> have also a 24 GHz Beacon relaying to us TLM data concerning some primary
> ESA
> experiments.
>
> Just my idea.
>
> 73" de
>
> i8CVS Domenico
>
------------------------------
Message: 10
Date: Mon, 4 Jun 2012 06:01:21 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: full duplex w/ 2 HT's
Message-ID: <75438E63-EE7F-4C7E-A981-E41774EE5A15@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Usually the diplexer as a filter is only needed to keep the 2m tx from
overloading a 70cm preamp. For a two radio setup with no preamp, it usually
isn't needed at all.
73, Drew KO4MA
Sent from my iPhone
On Jun 3, 2012, at 10:45 PM, Greg D <ko6th.greg@xxxxx.xxx> wrote:
> So, all the on-line information seems to point to this solution - putting
> a diplexer (filter) on the 70cm side to tap off and absorb the incoming 2m
> signal. Isn't there also a design where one puts a filter on the 2m side,
> to tap off and absorb the 70 cm (3rd harmonic of 2m) signal?
>
> I would think that any (reasonable) 70cm receiver would have enough
> rejection for a signal so far out of band, but the in-band 3rd harmonic
> can only be taken care of at its source. At least, I think that's the
> logic.
>
> Is there anything worthy about the other design, or is the most common
> problem that our HTs can't possibly deal with a strong 2m signal on the
> 70cm side because of their "DC to Daylight" receivers?
>
> I've been on the mode-J birds without much of a problem with this sort of
> desense, though I did have a lot of trouble on AO-40 with reflected RF
> when aiming through a big oak tree behind the house. The 70cm uplink was
> interfering with the 13cm downlink, and I was pretty sure at the time that
> it was a 3rd harmonic sort of problem.
>
> Just curious,
>
> Greg KO6TH
>
>
> Ronald Nutter wrote:
>> Robert:
>>
>> I have used a duplexer on the UHF side of my satellite ops for several
>> years. I find that some radios have more of a desense problem than
>> others. Here is a link to my website where I briefly talk about what I do
>> on portable ops and using what is referred to as a Mode J filter -
>> http://www.ka4kyi.com/satellite_gear/misc_equipment/
>>
>> Ron Nutter
>> KA4KYI
>> AMSAT Area Coordinator for Missouri
>>
>> On 6/2/12 11:33 AM, Robert Coppock wrote:
>>>
>>>
>>>
>>> hola, i am trying to determine the best way to work full duplex on the
>>> birds with 2 HT's or radios. i cannot find any info so far on the web.
>>> my concern is to keep the transmit power out of the receive radio, i
>>> guess basically the difference between a diplexer and duplexer. since i
>>> am efficient (lazy) i thought i would just look for suggestions here
>>> while i am checking google also. what do i need, di/du/ plexer, and what
>>> is the correct wiring scheme ? i will be using the arrow antenna without
>>> the built in duplexer, from the 2 feeds (vhf/uhf) and 2 HT's for now. my
>>> picture of it so far, is to wire the vhf radio direct to the vhf feed
>>> port on the arrow, and have the uhf port on the arrow come into a
>>> duplexer, with the duplexer uhf port going to the uhf radio, and the
>>> duplexer vhf port terminated into a 50 ohm dummy load. also, any
>>> suggestions of specific duplexers would be appreciated. i think i
>>> started on this project a few years ago, but never got around to get!
>> ti!
>>> ng it all together. grazie mille, Robert k f 0 g cn81 in the woodwork,
>>> literally, shasta/klamath national forests.
>>> _______________________________________________
>>> 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
> _______________________________________________
> 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: Mon, 4 Jun 2012 05:47:29 -0500
From: "Nick Pugh" <quadpugh@xxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>, <CubeSat@xxxxxxx.xxx>
Subject: [amsat-bb] nitinol wire vs steel tape
Message-ID: <095b01cd423f$70bfe710$523fb530$@xxx>
Content-Type: text/plain; charset="us-ascii"
Does anyone on the list know if there is any trade off using nitinol wire
over steel tape for antennas on cube sats?
Thanks
nick
Office 337 593 8700
Cell 337 258 2527
Helping UL become a world Class Engineering and Educational School
------------------------------
Message: 12
Date: Mon, 4 Jun 2012 11:53:01 -0400 (EDT)
From: Dobarrows <dobarrows@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: full duplex w/ 2 HT's
Message-ID: <8CF108141285A4D-134C-12EB6@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
My portable setup using an arrow antenna doesn't use a diplexor or duplexor.
With the setup for 2m uplink, I connect my VX5R to the two meter driven
element with a piece of RG-8X.
I connect my Icom IC R10 to the 432 mhz driven element with another piece of
RG-8X. Just turn the radios on,
adjust the frequencies, and wave the antenna around until you hear the
satellite on the receive radio. When I transmit and I can hear my signal in
the IC-R10 I know that I may be heard. If I hear someone else in the
downlink, I stop transmitting and wait for another chance
Now note that my IC R10 is not a second HT, but just a receiver. You should
be able to swap in a second HT for the IC R10 with no problem.
Most of the time, I use a better setup by inserting a Down East Microwave
preamp between the antenna and the IC R10. The preamp improves reception on
the downlink considerably. By using a receive only radio with the pre amp,
I don't have to worry about accidently transmitting on 432 and burning up
the pre amp. I run the preamp with two six volt lantern batteries in
series.
When working a pass, I start with the receiver in usb mode and tuned about
10 mhz higher than the published downlink frequency. This helps me zero in
on the satellite. When the signal gets better (the squawking noise
listening to a FM signal with usb setting gets loud) I switch the receiver
to FM and gradually tune down frequency to keep up with the doppler. I
usually don't touch the transmit frequency on the VX 5R. I just keep it on
the published downlink frequency for the whole pass.
73, W8IJ
------------------------------
Message: 13
Date: Mon, 4 Jun 2012 18:07:32 +0200
From: chantal cappelletti <chantal.cappelletti@xxxxx.xxx>
To: Nick Pugh <quadpugh@xxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx CubeSat@xxxxxxx.xxx
Subject: [amsat-bb] Re: [CubeSat] nitinol wire vs steel tape
Message-ID:
<CAERGK4esKyX0nVSnQkectrUMc8WzGt5yM=bB+sEwws3yDZaicA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Dear Nick.
we have tried to use the Nitinol for our CubeSat but for our
experience it is better to use the steel tape.
If you want to have more details please contact us:
gauss.group@xxxxx.xxx
Thanks,
Chantal
2012/6/4 Nick Pugh <quadpugh@xxxxxxxxx.xxx>:
> Does anyone on the list know if there is any trade off using nitinol ?wire
> over steel tape for antennas on cube sats?
>
>
>
>
>
>
>
> Thanks
>
>
>
> nick
>
> Office?? 337 593 8700
>
> Cell????? 337 258 2527
>
>
>
> Helping UL become a world Class Engineering ?and Educational School
>
>
>
>
>
>
> _______________________________________________
> CubeSat mailing list
> CubeSat@xxxxxxx.xxx
> http://lists.cubesat.org/mailman/listinfo/cubesat
>
--
Chantal Cappelletti, PhD
G.A.U.S.S. coordinator
ITALY : +39-0688346436
? ? ? ? ? ? +393336200333 ?(cell)
? ? ? ? ? ? G.A.U.S.S.- Gruppo di Astrodinamica
? ? ? ? ? ? via Salaria 851,
? ? ? ? ? ? 00138 ROMA
USA :?? 001-606-783-9597 (office)
? ? ? ? ?? Space Science Center
? ? ? ? ?? Morehead State University
? ? ? ? ?? 200A Martindale Dr.
? ? ? ? ?? Morehead, Kentucky 40351
------------------------------
_______________________________________________
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 7, Issue 179
****************************************
------------------------------
Message: 3
Date: Mon, 4 Jun 2012 19:10:51 -0400 (EDT)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
To: "Bob Bruninga" <bruninga@xxxx.xxx>, amsat-bb@xxxxx.xxx
Cc: 'TAPR APRS Mailing List' <aprssig@xxxx.xxx>
Subject: [amsat-bb] Re: Transit of Venus event 5/6 June
Message-ID: <201206042310.020967@xxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Transit of Venus Special Event, 5/6 June 2012:
For the 7th time in Human history and last time this century, Venus will
pass in front of the sun on 6 June 2012. We are encouraging hams to join up
with astronomers and observers in public places to share in this event. It
is observable worldwide except the center of the Atlantic (eastern S.America
and western Africa) Everywhere else can see parts of it. It lasts 5+ hours
and is fully visible around the Pacific Rim. In the Usa it is late afternoon
on the 5th towards sunset.
All previous centuries were before the discovery of radio and so sailing
ships were dispatched around the globe to time the event. From these times,
the size of the Solar System could be calculated. It took months if not
years to get the data back. Now we can do it in 0.05 seconds with Ham radio.
See if you can contact hams at other Transit of Venus sites from your public
observing site. Here are the suggested calling frequencies. We don't want
contest-style pileups nor home stations. We just want a place where similar
public setups can contact like minded other public viewing sites via ham
radio and make their reports.
See the web page: http://aprs.org/VenusTransit2012.html
We are suggesting these calling frequencies:
40 Meters - 7180 KHz
20 Meters - 14240 KHz
17 Meters - 18140 KHz
15 Meters - 21240 KHz
12 Meters - 24940 KHz
10 Meters - 28340 KHz
VHF - Join the global APRS message reflector "CQ VENUS" to exchange live
APRS messages with all other participants. To do this, send APRS msg to
CQSRVR with the first words of your message CQ VENUS ... and your text. You
can send up to one messae each 30 minutes. For details, see the web page.
*** TAKE ALL IMPORTANT SAFETY PRECAUTIONS WHEN VIEWING THE SUN!!! *** Google
for Techniques.
Bob Bruninga, WB4APR (will be observing in Japan with a Japanese callsign
JH1IBN-7 from Kyoto.
------------------------------
Message: 4
Date: Tue, 5 Jun 2012 07:55:48 -0400 (EDT)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
To: bruninga@xxxx.xxxx amsat-bb@xxxxx.xxx
Cc: 'TAPR APRS Mailing List' <aprssig@xxxx.xxx>
Subject: [amsat-bb] Re: Transit of Venus event 5/6 June (DSTAR)
Message-ID: <201206051155.020985@xxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
FOr the Transit of Venus Event:
Event stations may join on DSTAR use reflector 1 CHARLIE. CHeck in and tell
us how it is going. SOmeone please keep a written log of contacts?
Bob, WB4APR
---- Original message ----
>Date: Mon, 4 Jun 2012 19:10:51 -0400 (EDT)
>From: <bruninga@xxxx.xxx>
>Subject: Re: [amsat-bb] Transit of Venus event 5/6 June
>To: "Bob Bruninga" <bruninga@xxxx.xxx>,amsat-bb@xxxxx.xxx
>Cc: "'TAPR APRS Mailing List'" <aprssig@xxxx.xxx>
>
>Transit of Venus Special Event, 5/6 June 2012:
>
>For the 7th time in Human history and last time this century, Venus will
pass in front of the sun on 6 June 2012. We are encouraging hams to join up
with astronomers and observers in public places to share in this event. It
is observable worldwide except the center of the Atlantic (eastern S.America
and western Africa) Everywhere else can see parts of it. It lasts 5+ hours
and is fully visible around the Pacific Rim. In the Usa it is late afternoon
on the 5th towards sunset.
>
>All previous centuries were before the discovery of radio and so sailing
ships were dispatched around the globe to time the event. From these times,
the size of the Solar System could be calculated. It took months if not
years to get the data back. Now we can do it in 0.05 seconds with Ham radio.
>
>See if you can contact hams at other Transit of Venus sites from your
public observing site. Here are the suggested calling frequencies. We
don't want contest-style pileups nor home stations. We just want a place
where similar public setups can contact like minded other public viewing
sites via ham radio and make their reports.
>
>See the web page: http://aprs.org/VenusTransit2012.html
>
>We are suggesting these calling frequencies:
>
>40 Meters - 7180 KHz
>20 Meters - 14240 KHz
>17 Meters - 18140 KHz
>15 Meters - 21240 KHz
>12 Meters - 24940 KHz
>10 Meters - 28340 KHz
>
>VHF - Join the global APRS message reflector "CQ VENUS" to exchange live
APRS messages with all other participants. To do this, send APRS msg to
CQSRVR with the first words of your message CQ VENUS ... and your text. You
can send up to one messae each 30 minutes. For details, see the web page.
>
>*** TAKE ALL IMPORTANT SAFETY PRECAUTIONS WHEN VIEWING THE SUN!!! ***
Google for Techniques.
>
>Bob Bruninga, WB4APR (will be observing in Japan with a Japanese callsign
JH1IBN-7 from Kyoto.
------------------------------
Message: 5
Date: Tue, 5 Jun 2012 05:14:14 -0700 (PDT)
From: William Leijenaar <pe1rah@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: PA5RWE passed away
Message-ID:
<1338898454.40803.YahooMailNeo@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi AMSATs,
I met Chris only a few times, but he was always very devoted to the ham hobby.
We shared the interrest in amateur satellites,? and he made records of the
satellite downlink from his shack in The Netherlands while Dirk (ON1DLL) and
me were travelling around Europe and making satellite contacts.
You will not be forgotten.
My condolences to his family and friends,
William Leijenaar, PE1RAH
------------------------------
Message: 6
Date: Tue, 5 Jun 2012 13:43:55 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] STRaND-2 and OSCAR-5 in SatMagazine
Message-ID:
<1338900235.92551.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The STRaND-2 nanosats feature in the June issue of the free publication
SatMagazine on pages 25-26.
Additionally on page 71 there is a picture of the satellite OSCAR-5 that was
built by radio amateurs at the University of Melbourne, Australia.
See http://www.uk.amsat.org/7990
73 Trevor M5AKA
AMSAT-UK http://www.uk.amsat.org/
----
------------------------------
_______________________________________________
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 7, Issue 180
****************************************
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