Hi, I recently came across an advertisment for radio transmitters & receivers which might interest some users. A company called Radio-tech in the UK is offering modules from 0.25mW to 10mW designed for data transmission. I haven't tried them myself, perhaps someone on the list can comment on their usefulness. The address is: Radio-tech limited, Overbridge House, Weald Hall Lane, Epping, Essex. Phone: UK sales 0181-368 8277 International sales +44 1992 57 6107 Web: http://www.radio-tech.co.uk/ As usual - I have no connection with the company. Keith. ========================================================== Keith Dowsett "Variables won't; constants aren't." E-mail: kdowsett@rpms.ac.uk WWW: http://kd.rpms.ac.uk/index.html