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video/audio

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this is video/audio bug

i dont understand sif transformer
 

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The block diagram makes it clear, it's a 5.5MHz FM modulated oscillator, to generate the intercarrier sound. You don't have your location listed, but you should make sure that 5.5MHz is what your country uses!.
 
SIF = Sound Intermediate Frequency. This transformer commonly used in TV sound systems.
 

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