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

[i8cvs]

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 at 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
>
>
>   > From: domenico.i8cvs at tin.it
>   > To: gordonjcp at gjcp.net; amsat-bb at 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 at gjcp.net>
>   > To: <amsat-bb at amsat.org>
>   > 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
>   > ---