Hi AMSATs,
It has been a long time ago that I have been active "on-air", and here on AMSAT-BB. Reason is to little time, and because of that I choose to improve my home lab and spend my late after work hours there, and not in front of the rigs hihi...
It is very interresting to see the work of the Delfi team, and they are now on the place where I was in 2005 with the Indian HAMSAT (VO-52) :) I can tell you its a hot place, in matters of sun and also hot (spicy) food hihi... I wish the team a good launch, and I will spend some more time to get my station ready to receive Delfi after launch...
I have not been active "on-air", but even more active with designing some new transponders. The reason I had to improve my home lab is because I wanted to design a very small transponder, that would fit easily in 1-cube satellite. With 0805 SMD this was even not possible anymore, so I went even to smaller sized SMD. (I guess the next step is my own made chip hihi).
My final design ended up in a 7cm x 7cm x 0,4cm prototype version. I guess this is small enough to fit in a cubesat :) Some details: Mode-B, Power supply 3.3V, >500mW PEP out, 30kHz Bandwidth (flat), with AGC, CW beacon incl, ~200 grams weight.
Now I am fixing up my design to get it from a home made prototype into a more profesional "flight" version. My idea is to make several of these transponders, and make them also available for other (cube)sat groups.
However, now I am stuck with the question what the standards are for mounting hardware in cubesat structures.
I don't have a cubesat (for the moment) because they are not in the cheap price class for me as a ham. On the other hand I have no experience in any cubesat project, and don't know all the ins and outs.
Maybe some cubesat expert can give me an idea how to make my final PCB (screw holes, sizes) in an efficient way to have my 7cm x 7cm x 0.4cm fit in other cubesat projects, in case some group will be interrested.
Beside my analog transponder I also like to have a pacsat system, to have it together in my future own cubesat. The pacsat system is an efficient system and I think its worth to have it back again.
Does anyone know if there is a group or ham that made (can make) such a system in cubesat format ? With todays small sized, low voltage, high speed and high amount of memory processors it should be no problem for a digital guru I guess. (I mean the pacsat system like KO-23/25 alike).
Thats all AMSATs, Enjoy the sats, and listen for Delfi... the next linear transponder :)
73 William PE1RAH ---
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Me too. The last satellite QSO I had was with Vern, WA2LQQ on Oscar 8.
William Leijenaar wrote:
Hi AMSATs,
It has been a long time ago that I have been active "on-air",
Hi Na Gunn, G8IFF
Very nice to remember the Amsat President Vern Riportella WA2LQQ
The last time I was in QSO with him was on OSCAR-10 testing my AC-SSB Level-1 TX Adapter of Vern design.
73" de
i8CVS Domenico
----- Original Message ----- From: "G8IFF/KC8NHF" [email protected] To: "amsat-bb" [email protected] Sent: Thursday, April 10, 2008 10:19 PM Subject: [amsat-bb] Re: Cubesat question
Me too. The last satellite QSO I had was with Vern, WA2LQQ on Oscar 8.
William Leijenaar wrote:
Hi AMSATs,
It has been a long time ago that I have been active "on-air",
Sent via [email protected]. 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
William Leijenaar wrote:
However, now I am stuck with the question what the standards are for mounting hardware in cubesat structures.
Although the CubeSat ICD specifies the external dimensions, there is no standard size of PCB or mounting scheme. Each university will come up their own internal arrangement, mounting scheme, and internal connectors, when designing their structure.
Some groups will use the off-the-shelf CubeSat Kit from the folks at Pumpkin. http://www.cubesatkit.com/ They may buy the Pumpkin structure and/or electronics, so they will design their custom modules to be compatible with that. So, if you wanted your transponder design to be ready to drop-in to a CubeSat Kit, you should follow their board-outline and mounting points. You can get the specifics from the CubeSat Kit Breakout Board Datasheet: http://www.cubesatkit.com/docs/datasheet/DS_CSK_Breakout_Board_711-00380-A.p...
The folks at The Stensat Group, designed a 2m/70cm transceiver for Libertad-1 and their fit theirs on a Pumpkin CubeSat Kit form-factor PCB. See http://www.stensat.org/satellites.htm
I hope you find this information of use.
73, -Daniel, VA3KKZ
William You might consider designing on the pumpkin format. The are gaming some market share
nick ----- Original Message ----- From: "William Leijenaar" [email protected]
However, now I am stuck with the question what the standards are for mounting hardware in cubesat structures.
I don't have a cubesat (for the moment) because they are not in the cheap price class for me as a ham. On the other hand I have no experience in any cubesat project, and don't know all the ins and outs.
Maybe some cubesat expert can give me an idea how to make my final PCB (screw holes, sizes) in an efficient way to have my 7cm x 7cm x 0.4cm fit in other cubesat projects, in case some group will be interrested.
Beside my analog transponder I also like to have a pacsat system, to have it together in my future own cubesat. The pacsat system is an efficient system and I think its worth to have it back again.
Does anyone know if there is a group or ham that made (can make) such a system in cubesat format ? With todays small sized, low voltage, high speed and high amount of memory processors it should be no problem for a digital guru I guess. (I mean the pacsat system like KO-23/25 alike).
73 William PE1RAH
Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Sent via [email protected]. 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
Hi William, PE1RAH
It would be very interesting to know from you if your Mode-UV transponder
http://www.qsl.net/pe1rah/p3e_mode-uv.htm
http://www.qsl.net/pe1rah/p3e_mode-uv2.htm
will fly or not on P3-E and eventually when.
For your information the Mode-UV indian transponder aboard of VO-52 is working very well and at present time VO-52 along with the old OSCAR-7 is the only satellite with a linear FDMA transponder to be used for CW and SSB so that I hope in a succesfull performance of Delphi-C3
I would like to know from you why your Mode-UV dutch transponder abord VO-52 is not switched ON periodically with the Mode-UV indian transponder.
Congratulations for your job.
Tanks for your replay
73" de
i8CVS Domenico
----- Original Message ----- From: "William Leijenaar" [email protected] To: [email protected] Sent: Thursday, April 10, 2008 9:57 PM Subject: [amsat-bb] Cubesat question
Hi AMSATs,
It has been a long time ago that I have been active "on-air", and here on
AMSAT-BB. Reason is to little time, and because of that I choose to improve my home lab and spend my late after work hours there, and not in front of the rigs hihi...
It is very interresting to see the work of the Delfi team, and they are
now on the place where I was in 2005 with the Indian HAMSAT (VO-52) :)
I can tell you its a hot place, in matters of sun and also hot (spicy)
food hihi... I wish the team a good launch, and I will spend some more time to get my station ready to receive Delfi after launch...
I have not been active "on-air", but even more active with designing some
new transponders. The reason I had to improve my home lab is because I wanted to design a very small transponder, that would fit easily in 1-cube satellite. With 0805 SMD this was even not possible anymore, so I went even to smaller sized SMD. (I guess the next step is my own made chip hihi).
My final design ended up in a 7cm x 7cm x 0,4cm prototype version. I guess this is small enough to fit in a cubesat :) Some details: Mode-B, Power supply 3.3V, >500mW PEP out, 30kHz Bandwidth (flat), with
AGC, CW beacon incl, ~200 grams weight.
Now I am fixing up my design to get it from a home made prototype into a
more profesional "flight" version. My idea is to make several of these transponders, and make them also available for other (cube)sat groups.
However, now I am stuck with the question what the standards are for
mounting hardware in cubesat structures.
I don't have a cubesat (for the moment) because they are not in the cheap
price class for me as a ham. On the other hand I have no experience in any cubesat project, and don't know all the ins and outs.
Maybe some cubesat expert can give me an idea how to make my final PCB
(screw holes, sizes) in an efficient way to have my 7cm x 7cm x 0.4cm fit in other cubesat projects, in case some group will be interrested.
Beside my analog transponder I also like to have a pacsat system, to have
it together in my future own cubesat. The pacsat system is an efficient system and I think its worth to have it back again.
Does anyone know if there is a group or ham that made (can make) such a
system in cubesat format ? With todays small sized, low voltage, high speed and high amount of memory processors it should be no problem for a digital guru I guess. (I mean the pacsat system like KO-23/25 alike).
Thats all AMSATs, Enjoy the sats, and listen for Delfi... the next linear transponder :)
73 William PE1RAH
Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Sent via [email protected]. 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
Hi Domenico,
On the transponder readiness review meeting last year it was decided to fly the SDX (Software Defined Transponder) for the UV-Mode.
One of the reasons was, that this would allow us to have LEILA and STELLA functionality against the Alligators problem.
more here: http://www.amsat-dl.org//index.php?option=com_content&task=view&id=1...
The SDX design by Howard Long G6LVB was also described in the AMSAT-DL journal...
73s Peter, DB2OS
i8cvs wrote:
Hi William, PE1RAH
It would be very interesting to know from you if your Mode-UV transponder
http://www.qsl.net/pe1rah/p3e_mode-uv.htm
http://www.qsl.net/pe1rah/p3e_mode-uv2.htm
will fly or not on P3-E and eventually when.
For your information the Mode-UV indian transponder aboard of VO-52 is working very well and at present time VO-52 along with the old OSCAR-7 is the only satellite with a linear FDMA transponder to be used for CW and SSB so that I hope in a succesfull performance of Delphi-C3
I would like to know from you why your Mode-UV dutch transponder abord VO-52 is not switched ON periodically with the Mode-UV indian transponder.
Congratulations for your job.
Tanks for your replay
73" de
i8CVS Domenico
Hi Domenico,
From what I understood will my MODE-UV transponder not fly on P3e.
There is a Software Defined Transponder that will fly instead. I don't know all the details as I never got the information directly, but more "discover" this every time while reading AMSAT-DL Journal. I have requested AMSAT-DL to send me the MODE-UV transponder hardware back, so I might use it in another satellite project... however I never seen my hardware back :(
Besides that, I discovered that there were more groups working on a MODE-UV for P3e at that time (without knowing). After all, in my opinion it was a huge waste of my money and waste of my free time that I spend for P3e. I could have made several new transponders in the same time and have them maybe fly already on other satellite projects. So, thats why I now have developed this new smaller transponder for picosats as a privat project...
About my transponder on HAMSAT, it was agreed that ISRO switch transponder each one or two month. I know that it is not switched on that often, and I have send emails and letters to ISRO about their skedule several times. Unfortunately the people are very busy by email, and by letter I do not get any response. As the hams are happy with HAMSAT I don't make a real problem of it that my transponder is not switched on that often. One day the Indian transponder will fail, and then my transponder will rescue HAMSAT again hihi...
Have a nice day,
William PE1RAH ---
--- On Sat, 4/12/08, i8cvs [email protected] wrote:
From: i8cvs [email protected] Subject: Re: [amsat-bb] Cubesat question To: "William Leijenaar" [email protected], "AMSAT-BB" [email protected] Date: Saturday, April 12, 2008, 5:31 AM Hi William, PE1RAH
It would be very interesting to know from you if your Mode-UV transponder
http://www.qsl.net/pe1rah/p3e_mode-uv.htm
http://www.qsl.net/pe1rah/p3e_mode-uv2.htm
will fly or not on P3-E and eventually when.
For your information the Mode-UV indian transponder aboard of VO-52 is working very well and at present time VO-52 along with the old OSCAR-7 is the only satellite with a linear FDMA transponder to be used for CW and SSB so that I hope in a succesfull performance of Delphi-C3
I would like to know from you why your Mode-UV dutch transponder abord VO-52 is not switched ON periodically with the Mode-UV indian transponder.
Congratulations for your job.
Tanks for your replay
73" de
i8CVS Domenico
----- Original Message ----- From: "William Leijenaar" [email protected] To: [email protected] Sent: Thursday, April 10, 2008 9:57 PM Subject: [amsat-bb] Cubesat question
Hi AMSATs,
It has been a long time ago that I have been active
"on-air", and here on AMSAT-BB. Reason is to little time, and because of that I choose to improve my home lab and spend my late after work hours there, and not in front of the rigs hihi...
It is very interresting to see the work of the Delfi
team, and they are now on the place where I was in 2005 with the Indian HAMSAT (VO-52) :)
I can tell you its a hot place, in matters of sun and
also hot (spicy) food hihi... I wish the team a good launch, and I will spend some more time to get my station ready to receive Delfi after launch...
I have not been active "on-air", but even
more active with designing some new transponders. The reason I had to improve my home lab is because I wanted to design a very small transponder, that would fit easily in 1-cube satellite. With 0805 SMD this was even not possible anymore, so I went even to smaller sized SMD. (I guess the next step is my own made chip hihi).
My final design ended up in a 7cm x 7cm x 0,4cm
prototype version.
I guess this is small enough to fit in a cubesat :) Some details: Mode-B, Power supply 3.3V, >500mW PEP out, 30kHz
Bandwidth (flat), with AGC, CW beacon incl, ~200 grams weight.
Now I am fixing up my design to get it from a home
made prototype into a more profesional "flight" version. My idea is to make several of these transponders, and make them also available for other (cube)sat groups.
However, now I am stuck with the question what the
standards are for mounting hardware in cubesat structures.
I don't have a cubesat (for the moment) because
they are not in the cheap price class for me as a ham. On the other hand I have no experience in any cubesat project, and don't know all the ins and outs.
Maybe some cubesat expert can give me an idea how to
make my final PCB (screw holes, sizes) in an efficient way to have my 7cm x 7cm x 0.4cm fit in other cubesat projects, in case some group will be interrested.
Beside my analog transponder I also like to have a
pacsat system, to have it together in my future own cubesat. The pacsat system is an efficient system and I think its worth to have it back again.
Does anyone know if there is a group or ham that made
(can make) such a system in cubesat format ? With todays small sized, low voltage, high speed and high amount of memory processors it should be no problem for a digital guru I guess. (I mean the pacsat system like KO-23/25 alike).
Thats all AMSATs, Enjoy the sats, and listen for Delfi... the next
linear transponder :)
73 William PE1RAH
Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam
protection around
http://mail.yahoo.com _______________________________________________ Sent via [email protected]. Opinions expressed are
those of the author.
Not an AMSAT-NA member? Join now to support the
amateur satellite program!
Subscription settings:
__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
participants (6)
-
Daniel Kekez -
G8IFF/KC8NHF -
i8cvs -
Nick Pugh -
Peter Guelzow -
William Leijenaar