Modified Black and White Television?

[sje]

Back in the Old Days it was rare for enthusiast hardware to be able to output to a consumer television directly because of the stringent standards set by the FCC for radio frequency generation in the TV broadcast band. So, an enthusiast would either pay for a video monitor or purchase an RF modulator. The modulator would take a video signal as input and use it to modulate a TV carrier for a broadcast channel, usually channel two or channel three.

The older video game console systems also used an RF modulator; some had an internal version of such.

Nowadays, most consumer televisions have direct video inputs, so an RF modulator is not needed. This is a good thing as I'd guess that old RF modulators are hard to find today.