Does anyone know any schematic for sending and receiving video and sound on VHF or UHF?

Question

Does anyone have any schematic for sending and receiving video and sound on VHF or UHF? I really needed!

Answer 1

if you are talking 10 milliwatt or less, you could make a "game" type modulator. it would not meet the legal requirement for broadcast. This simplified version will have interference with other TV channels

The audio (mono) is FM modulated on a carrier 4.5 Mhz above the visual carrier and no more than 10 percent of the visual power level. The visual is AM modulated by the video signal, which is the analog output from a camera.

The receiver is a TV set. or you could modify an FM radio for the audio, and detect the video with a diode. To work on a TV set you need to select standard carrier frequencies in the 6 MHz channel assignment. Channel 2 in the USA is 54 to 60 MHz, the visual is always 1.25 MHz above the lower channel limit, or 55.25 MHz in this case, aural is plus 4.5 or 59.75 MHz.

.Broadcast versions are very complex and have to meet many regulatory requirements.