What are some jokes about radios?

The French lesson. Two blondes meet and one of them greets: Bonjour, to which the other blonde replies: What is that? The first woman explains that she is speaking French: I discovered that when I tune to Hilversum 1, and then turn the tuning knob a bit to the right, I hear a French station and I took this up from listening it.
A few weeks later the women meet again, and again the first blonde says Bonjour. This time her friend replies: Krgg, krgg, krgg, krgg, ..