This Circuit is Video RF Transmitter converted baseband video to TV RF in VHF High and UHF band. If the frequency want to change between VHF and UHF band change the coil value. In this video RF transmitter circuit only video signal as input to modulated and if it want to modulate audio signal, can be modulated as FM.
This circuit is a powerful video sender in VHF band. The video modulator section is designed to operate on either channels 7 to 13 or 14 to 29. For channels 7 to 13, L1 and L2 are 3 turns of #22 wire wound on a 3/16 inch form. For channels 14 to 29, L1 and L2 are 2 turns of #22 wire wound on a 3/16 inch form. Video signal is modulated as AM.
This circuit is a powerful video sender in VHF band. The video modulator section is designed to operate on either channels 7 to 13 or 14 to 29. For channels 7 to 13, L1 and L2 are 3 turns of #22 wire wound on a 3/16 inch form. For channels 14 to 29, L1 and L2 are 2 turns of #22 wire wound on a 3/16 inch form. Video signal is modulated as AM.
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