Seventy-five years ago, if you wanted to upgrade your television, you could add FM reception, as detailed in the January 1951 issue of Popular Mechanics. As we’ve noted previously, it wasn’t unheard of to swap out the front end of the set and put in a rebuilt tuner.  Thanks to Dumont, you could buy a tuner that included, nestled in between channels 6 and 7, the FM broadcast band.  As an added bonus, you would probably get a better picture, since the tuner exhibited more gain, especially on the upper channels.

The article explained which models were candidates for the swap.