Great to hear the voices of John Brannigan, a Scottish radio propagation specialist, who was the perfect interviewee. He really knew his field and could explain things in non-technical language. The other guest in this programme is BBC World Service Chief Engineer Keith Edwards. He was one of the first top managers to turn up at shortwave listener gathering and explain what they were trying to do at the transmitting end. He also anticipated home satellite radio and TV reception several years before it took off in hobby circles. Remember this is well before the launch of Sky Satellite Television.