tda7050
The performance of my receiver, and hence the TEA5711 is very good. I built the receiver, and tested it. I am in Beirut and receiving good stereo transmissions all the way from Cyprus, 240km/150miles away. the AFC functions good and locks on stations well. The AFC level can be increased/decreased by decreasing/increasing the value of the capacitor at pin 20 of the 5711. Adjacent chanel selectivity depends on the selection of the two 10.7Mhz filters, which in my receiver plug in sockets. I tested filters from 280Khz to 150Khz band width, and settled on the 150Khz with excellent selectivity. I tried a filter in place of the discriminator at pin 5, like Patrick Cambre did in his receiver, the sound was awful, a ceramic discriminator should be used, no questions asked. I used 1uF electrolytic capacitors at pins 2 and 3 instead of the suggested 0.1uF in the application circuit and got better low frequency audio response.
The stereo channel separation of 30dB of the TEA5711 might be low compared to that of dedicated stereo decoder IC's, which is on the order of 40 to 45 dB. Still, it sounds very good, and I can't tell the difference when I compare it with my homemade stereo MPX decoder with 45dB separation.
As far as the circuit I used, it is the application circuit in the TEA5711 data sheet, as I have mentioned on my website.