[amsat-bb] Re: OH2AUE P3E transponder demo video

Michael Fletcher oh2aue at kolumbus.fi
Sun Oct 21 22:14:42 PDT 2012

Hi Domenico,

first of all the P3E 'P5A transponder' is a team effort: you may
find the members here:


Regarding the frequencies, you should be able to decipher the
most important information from this ecrypted document, or
alternatively you could try your luck with a translator that
attempts (!) to handle Finnish to your language preference:


There are significant frequency scheme challenges (check out the
complexity of the block diagram, being necessary to maintain the
coherent uplink/downlink ratio of 30:7), but I think the final
frequency plan is fairly satisfactory.

73 Michael OH2AUE


15.10.2012 22:23, i8cvs kirjoitti:
> Hi Kauto, OH2LFM and Michael OH2AUE
> Congratulations to both of you and expecially to Michael OH2AUE
> the designer and builder of the X band transponder
> I have seen your OH2AUE P3E transponder demo video and I hope
> that the downlink is in the same X band frequency 10450-10452 MHz
> as on  AO40 because I have my homebrewed downconverter and a
> 60 cm dish with Chaparral feed tuned for the above frequency band
> since AO40 but unfortunately never used because of AO40 problems.
> I hope to use it on P3E as soon it will be in orbit.
> Please let us know more details on downlink frequency band as well
> output power and antenna that AMSAT-DL plan to use on P3E
> Thanks
> 73" de
> i8CVS Domenico
> ----- Original Message -----
> From: "Kauto Huopio OH2LFM" <oh2lfm at sral.fi>
> To: <amsat-bb at amsat.org>
> Sent: Monday, October 15, 2012 6:47 PM
> Subject: [amsat-bb] OH2AUE P3E transponder demo video
>> Just went through my old ham camp videos..
>> Here is OH2AUE with a P3E transponder demo at SRAL summer camp
>> 2011. In Finnish, but images do the talking :)
>> http://www.youtube.com/watch?v=y7Awv4oLM78
>> --Kauto OH2LFM
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