Eric.

Thanks for the input.  I remember you telling me a lot of this stuff last
year sitting in front of the DRM table!

I told Richard that I wanted to demo an actual SDR transceiver for a forum
this year.  Problem is, I haven't purchased one - yet.  I know the prices of
the Flex SDR-1000 are going down a little bit now since they introduced the
newer SDR-5000.  I played with one extensively at the last Orlando hamfest
and fell in love with it.  Sooo maybe next year (2009), I'll demo the
SDR-5000 with a live antenna so people can actually see/hear how the thing
works.  From what I've seen so far, SDR is the way to go!  Who knows, maybe
we'll build an antenna that's appropriate for an SDR transceiver in the demo
room for transmitting and receiving?  Don't want to blow away any other
radio front ends however!

I'll look more closely at the three links you sent me Eric.  Thanks again.

-Tim



On Dec 6, 2007 11:17 PM, Eric A. Cottrell <[EMAIL PROTECTED]> wrote:

> Tim Lemmon wrote:
> > Richard and John.
> >
> > Here's an idea for a forum at next years SWL Fest.  Earlier today, I
> > was eating lunch with some local hams.  Two of them had just
> > discovered Linux and raved at how easy it was to install and use.  Of
> > course I've been fooling with Linux for years so I loved hearing their
> > enthusiasm.  The conversation quickly turned into the thought of me
> > creating a Linux based presentation to our local club.
> >
> > After giving it some thought, maybe that would work.  There are a ton
> > of ham radio applications out there.  Maybe some for SWL too, haven't
> > checked into that yet.  Since Linux and all programs are totally FREE,
> > I bet there would be a large interest level at the fest.  Maybe I
> > could create a forum such as "Linux and the SWL" ?  Concentrate on
> > what it is, how easy it is to use, and what programs are available for
> > the SWL.
> >
> > If you guys think this is something worth thinking about, I'll do some
> > research.
> >
> > -Tim
> >
> Hello,
>
> There are alot of linux-based stuff around.  A couple I was/am involved
> with include:
>
> Hamlib is a library not only to control ham rigs but receivers and
> scanners as well.  A number of Linux programs use it to control the
> radio and there are generic receiver control applications in Linux.
> http://hamlib.sourceforge.net/
>
> The SWLFest has talked about Software Defined Radio (SDR) in the past.
> The SDR toolkit under Linux is GNURadio.  It can also be compiled for
> Windows and the Mac.
> http://www.gnu.org/software/gnuradio/
>
> The really neat hardware to use with GNURadio is the Universal Software
> Radio Peripheral.
> http://www.ettus.com/
>
> It would be neat if you could get Matt Ettus to talk about it although
> he is in California.  Another SDR guy is over in NJ, Bob McGwier, N4HY.
> I found a lot of hams involved in AMSAT and TAPR are also involved in
> GNURadio and other Ham SDR projects.  There seems to be better SDR
> hardware being designed every year.
>
> I have done two neat receivers with my USRP so far.  They really show I
> am a VHF/UHF listener.  The first is a SCA Receiver that was done by
> modifying the FM Broadcast receiver sample.  The SCA Receiver is also a
> sample program as my first contribution to GNURadio.  The second is a
> 1090 MHz receiver that receives ADS-B and Mode-S data frames from
> Aircraft.  This is more complex, required some new building blocks, and
> is not finished yet.
>
> 73 Eric
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