After a career in electronics engineering, Tony Parks, KB9YIG, returned to ham radio, after thirty years, to find it very different than when he first started in the 1950s.  Upon returning in 2000, Tony discovered software defined radio or SDR, where he saw an opportunity to build starter kits for HF SDR receivers that became the Softrock SDR kits.  Tony joins Eric, 4Z1UG to discuss SDR and Softrock.