Not sure why I thought you were pointing to 2.4ghz module from Microchip. Anyway, you can get 500m with 10mW in 433mhz but more on the 1200-2400bps than 9600bps as advertised by Sparkfun. Take a look on the BER charts to see how Frequency, Bit rate and receiver sensitivity will influence your range. 2010/2/3 Ariel Rocholl > I have some relevant experience with ISM modules from different vendors, > and I can tell you 500m with 10mW LOS is very optimistic. You may get that > but you will need a lot of effort on a good directional antenna both sides, > and low bit rate. If you really need 500m with 10mW think better on 433mhz > which propagates way better than 2.4ghz. > > 2010/2/3 Vitaliy > > John Hansen wrote: >> > With a 7dBm power output (~5 mw) the range is not going to be very far! >> >> Sparkfun claims 500 m range w/ 10 mW output: >> >> http://www.sparkfun.com/commerce/product_info.php?products_id=155 >> >> Vitaliy >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > Ariel Rocholl > Madrid, Spain > -- Ariel Rocholl Madrid, Spain -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist