Television: RF Modulator Buyer's Guide

An RF modulator is a device which lets you connect audio and/or video devices which use RCA cables to your television's standard 75-ohm cable-style jack. Some devices which may need an RF modulator include DVD players, older computers, and video game systems. You might also be able to receive sound from an audio device such as a stereo receiver or record player through an RF modulator, if you want to use your television's speaker for this purpose.

However, you may not actually need an RF modulator to do this. If your TV already has RCA input jacks, you can directly connect the device to your TV and set it to the input channel. Also, some video cassette recorders have a built-in RF modulator. Make sure that the device actually needs an RF modulator to connect to your TV - refer to the device's manual or try to find it on the internet if possible.

If you are trying to connect a computer with an RCA jack for video output (usually pre-1992) to your television, it may or may not need an RF modulator. Some computers, like the Tandy 1000 series, do require an RF modulator or RCA input jacks on the TV. Others, such as the Commodore 64, don't need an RF modulator and won't work with RCA input jacks. Computers of the 2nd type should instead be connected to a TV/computer switchbox (sometimes referred to as a "TV/game switchbox"), which then connects to the television. The same is true for some video games systems like the Atari 2600.

After you are sure that you need an RF modulator, consider some of the features you might want to look for in one. Some have s-video support, which is useful if you have a device with this type of video output. While many RF modulators (like the Radio Shack 15-1214) have a regular built-in power cord, others use a larger AC adapter. An RF modulator with a normal power cord is less likely to block other outlets it isn't using, as adapters sometimes do.