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[SOLVED] replacement of a modulator in FM encoder

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fareen

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hey
http://home.telkomsa.net/jeanward/images/FM_stereo_transmitter_stereo_encoder_schematic_large.gif
this is the circuit o FM encoder, i have simulated this circuit on proteus, got the required results.
but doing on hardware cause problem. the modulator is not producing the required output. the FFT of the signal before the bandpass filter shows lots of harmonics as it should be , but the final output also shows these harmonics outside the range of bandpass filter. bandpass filter has frequency range of 23KHz to 53Khz.
any idea abt the replacement of the modulator?
 

fareen

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yes Frank, you are right
 

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