For parts only.

Nexus Engineering Corp. VM-5 Television Modulator Channel A. See pictures for more details.

Model VM-5

Serial # 123030

Fixed Channel A

An RF modulator (radio frequency modulator) is an electronic device used to convert signals from devices such as media players, VCRs and game consoles to a format that can be handled by a device designed to receive a modulated RF input, such as a radio or television receiver.