Hi Robert, WB5MZO

I don't believe that the linear transponder built and sold by PE1RAH for a price of 1800 Euro is a flight space ready device because normally it need to be tested at minimum into a vacum chamber at low and high temperature and also vibration test and so on to be qualified for a flight space launch.

73" de

i8CVS Domenico

----- Original Message ----- From: R Oler To: domenico.i8cvs@tin.it Sent: Thursday, October 18, 2012 8:10 PM Subject: RE: [amsat-bb] Re: OH2AUE P3E transponder demo video

Is the cost you mentioned for a flight space ready device? Robert WB5MZO

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From: domenico.i8cvs@tin.it To: gordonjcp@gjcp.net; amsat-bb@amsat.org Date: Thu, 18 Oct 2012 17:28:20 +0200 Subject: [amsat-bb] Re: OH2AUE P3E transponder demo video

----- Original Message ----- From: "Gordon JC Pearce" gordonjcp@gjcp.net To: amsat-bb@amsat.org Sent: Thursday, October 18, 2012 8:47 AM Subject: [amsat-bb] Re: OH2AUE P3E transponder demo video

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What I am referring to is linear transponders. They're heavy and consume a lot of power. We need to either devise a new way of doing that, that doesn't involve heavy inefficient linear amplifiers, or stick to something like FM or GMSK where a little lightweight PA that doesn't dissipate most of the input power as heat will do the job.

It depends what you're trying to achieve. I'll respond to Domenico's comments here, too.

Gordon JC Pearce MM0YEQ

Hi Gordon, MM0YEQ

Linear transponder can be built not heavy not to consume a lot of power and not too costly.

Read please the following advise of William PE1RAH to my friend Roberto IW5BSF for a linear transponder designed for Ham radio frequencies to be integrated in CubeSat projects, balloon missions or terresterial repeaters.

http://www.leijenaarelectronics.nl/leijenaar_electronics_009.htm

Dear Roberto,

The transponder I sell as a complete (pre-made) package in which the programmer and software all is included.

It is made of very small SMD parts, 0402 size, that can only be soldered with profesional reflow oven (which I use).

The whole package includes:

Transponder on profesionally milled evaluation board (fully tested) , power supply, programmer included all cables, example source code, and manuals.

The transponder will be delivered with a testing report.

I can deliver it for the price of 1800 Euro (excluded shipping cost).

The transponder will be operational in a matter of minutes (the time to connect antenna cables and power supply). Manufacturing time is about 2 weeks, because of testing time to guarenty the quality.

Datasheet and information you can find on my website:

www.leijenaarelectronics.nl

Thank you for your interrest and kind regards,

William Leijenaar, PE1RAH Leijenaar Electronics Bergmanshofweg 2 5926 RH Venlo The Netherlands

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