Radio 1's birthday logo

radio 1, probably the best radio in prague, has 15 years aniversary and wants a special logo for this occation... so this is my try. author of the best logo will get 10.000 CZK (340Euro) reward, which is really nice but I dont think I have any chance, it was fast work and I'm kinda without inspiration last time...
but at least, I can have good feeling that I tried to do something