[Photo] Use Î¼PC 1366 to improve the radio sensitivity

Î¼PC1366 is an image channel integrated block in black and white TV sets. There are four-stage high-gain differential amplifiers and synchronous detectors inside, so it is worth a try to use it to improve the sensitivity of the radio.
The circuit is to the right of the dotted line in the drawing. The circuit does not have any special components, just connect according to the figure, without debugging, it is ready. However, please note that the intermediate frequency of the radio used must be 465 kHz.
This circuit can also improve the selectivity of the radio, which is most obvious when used on short-wave radios.

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