I have three of the Hummingbird spread spectrum modems from Xetron that have
been going non stop now for about 2 years with no problems.  The evaluation kits
that came with enclosures were $800 each.

Craig Lee wrote:

> Check out RFM.  They may have a 2.4 GHz solution by now.
>
> Their TR series hybrid transceivers are pretty awesome even at $12 CAN each
> (low vol),
> and they can support data rates 2x that of the linx modules.
>
> The linx modules cost us $50 CAN each for just the transmitter or the
> receiver
> and they insisted that we purchase the development kit for a few hundred
> before
> we were allowed to purchase the modules.  Not so with RFM, and I can
> purchase them
> from the local Insight rep, instead of through the painfully slow US/CAN
> customs route.
>
> The RFM transceivers are .28 x .40 x 0.08 inches.  The linx modules are
> significantly
> larger at 1.3 x 1.1 x 0.2 inches for the transmitter and 2 x 1.2 x 0.5
> inches for the
> receiver.
>
> The only advantage I see that the Linx modules have over the RFM units is
> that Linx
> can transmit audio just as well as data and it can be digitally tuned on the
> fly to
> one of 8 channels.  The RFM modules use fixed saw technology thus only fixed
> freq.
> are available.
>
> Craig
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Barry King
> > Sent: July 13, 1999 1:36 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: OT: Looking for small 2.4 GHz TX RX pair
> >
> >
> > > Hi ,I'm looking for a small 2.4 GHz TX - RX pair for a PIC based project
> > > I'm working on.
> > If it has to be 2.4 GHz for world-wide use, you could try Digital
> > Wireless.  Sorry I don't have the URL.  I've been testing them, they
> > only sort of work, but it might still be me...
> >
> > If you can go to 900 MHz (US only), try the modules from Linx.
> > www.linxtechnologies.com
> > Cheaper, Simpler, seem to work.
> >
> > Regards,
> >
> > Barry.
> > ------------
> > Barry King, KA1NLH
> > Engineering Manager
> > NRG Systems "Measuring the Wind's Energy"
> > Hinesburg, Vermont, USA
> > barry@nrgsystems.com
> > "The witty saying has been deleted due to limited EPROM space"
> >