In message <34F36499.6D0664BA@sct.gu.edu.au>, Ken Parkyn writes >Hello again all; > >I have an associate who has been using a TCM3105 modem chip in >packet radio applications. >These are no longer available at an affordable price. >Does anyone know whether someone has already done this in a PIC, >or if there is a similar chip which will do the job? I think that the Baycom team has done something like this. Leon -- Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850 DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.