indra raharja

Hi Audioguru, now i have done my project with lm567 but it didn't work as i want. I use a LED as a load. But the LED still "ON" no matter the input frequency is out from my bandwidth setting. I've try a couple solution (like add a low pass filter) but it didn't change. I use a lm567 as a tone decoder from the frequency that i was send from FM transmitter (i was use ne555 as the information frequency). Can you give me any solution with this problem? thanks, and i hope your reply as soon as.