I've purchased these units and am having good luck so far in building a
simple remote control application. I believe I'm getting close to the
rated range.
I did not buy their encoder/decoder chips but instead rolled my own
packet-based PIC code which seems to work pretty well, but the data rate
is pretty low.
The downside of these transmitter/receiver pairs are that they have a
pretty reactive AGC so you need to condition the signal at one or both
ends somewhat (this can be done by properly selecting
preamble/synchronization data). The bandwidth of these units is about
2k.
The modules are tiny (probably made to fit the xmtr in a keychain
remote) and low power. They work best with an external antenna added,
but it does not need to be very long.

steve

-----Original Message-----
From: Ann & David Scott [mailto:andscott@LOGANTELE.COM]=20
Couldn't you use:
http://www.laipac.com/msg5.htm
315, 418 & 433.92Mhz     8mW
$4.8 USD for each Tx or Rx.
They also sell encoder/decoder chips which make it easier.
Their datasheet is brief but shows circuit to make it work (worked for
me).

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