The circuit shown in the figure generates a signal between 50 and 100 MHz and can therefore be captured on the low channels of the VHF range of a television. The signal can be modulated by an external audio tone applied to the base of the transistor or used as indicated (without modulation), thus producing an image without details. The circuit when using a 20 to 30 cm antenna has a range that can reach up to 50 meters. Power can be done using regular batteries or cells.
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