I think I know what the problem is - you're forgetting the intermediate frequency. If you want to tune to, say, 100Mhz, you have to set the tuner frequency to 131.9 Mhz, or better yet you should use 33 Mhz as the IF since that is the centre frequency of that specific filter, although according to the datasheet pin 2 must be connected to pin 1 for it to work at that frequency.
1 Like