Problem with TA2003 FM oscillator connected to tank circuit

[Masood_786]

Hi All,

I have connected all the components for TA2003 FM mode but it seems that i am unable to tune any station(FM band coil and gang capacitor). I have connected all components over breadboard (TA2003 and all required Rs & Cs) except tank circuit which is soldered in separate wire-board, i thought that tank is most sensitive part so i put that on separate wire-board but still unable to Pick any station. Any ideas what has gone wrong? has any one used this chip over breadboard.(can we use the chip for 8-108 MHz FM band over bread board, remember that Tank circuit is separately soldered on the wire-board that would handle 88-108 MHz signals)

Masood

 

[vfone]

Re: TA2003 FM Oscillator

The oscillator tank circuit should stay as close as possible from the IC, and not to a different board.
The circuit needs a connection to Vcc at pin 14 to enable FM operation.
To see if the FM detector is working (at least) connect and disconnect pin nr. 8 (IF inp) and there should be an increase/decrease of the audio hiss noise.
Ideally would be to have a modulated signal generator and inject 10.7MHz at the IF input, and 100MHz at the RF input.

 

[ehico16]

can please the circuit diagram so that people can see, and no where the error is

---------- Post added at 11:30 ---------- Previous post was at 11:12 ----------

can please the circuit diagram so that people can see, and no where the error is