rf modulator, what about transmitter?

["Bill Kearney" <wkearney99@xxxxxxxxxxx>]

What's available for actually transmitting an RF channel 3 signal, say,
about 10 feet?

As in, push a signal from belowdecks on a boat up to a portable television.
That is, to a TV that's got nothing other than it's regular RF tuner.  No
video, s-video or even a female F-connectors.   It doesn't have to be
specifically channel 3 of course, but any other channel that a regular TV
might be able to pick up.

Anybody make such a thing as a ready-made product?  (not a kit)

They make such things for FM, what about TV?

Thanks,
-Bill Kearney