----- Original Message ----- From: "Gordon JC Pearce" <[email protected]> To: <[email protected]> Sent: Thursday, October 18, 2012 8:47 AM Subject: [amsat-bb] Re: OH2AUE P3E transponder demo video
> 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 --- _______________________________________________ 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
