Jan Willem Drexhage tells us about new satellite subcarriers. Listeners ask us to explain the Luxembourg Effect which turned out to be a natural phenomenon. We look at the first Boundless Sound conference in Amsterdam, with a memorable montage explaining why TV cannot deal with ideas. Chris Greenway of BBC Monitoring has heard a revived station on 8127 kHz USB Israel Defense Forces Radio. Willem Bos joins us to explain why point to point communications are still around on shortwave. Modern techniques like spread spectrum can hide military communications. Paul Ballister reports on temporary stations in North West London.

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