First of all about the name. In USSR there was a lot of portable radios with names of the sport theme. For example "Alpinist", "Olympic", "Sport-301", "Tourist" or "Geologyst". This portable radio named in the same manner, in honor of cafe racers. This is the kind of bikers (cyclist mybe too), whoose summer tour ends in the nearest cafe in their neighbour.
The main Idea is to replace LC contours with variable capacitor to variable capacitance diode ones. Then tune radio using PWM voltage signal from microcontoller. This radio IC additionali have volume control voltage input, so, microcontroller control loudness too.
But this questionable trick is not alone. This radio have led clock on discrete SMD LEDs with shift registers. First 7 bits controls sements of the 7-segment gigit, 8-th bit used for dynamic indication, choosing the 1st or 2-nd digit to indicate. So, for 6-digit clock I need only 3 595 shift registers.