Turning the TV dial with a pair of pliers because the knob fell off.
The UHF dial.
Having 5-6 TV stations to choose from, in the larger cities.
The TV remote making that metallic pinging sound.
The youngest child in the room
being the remote control.
Channels signing off for the evening with the Star-Spangled Banner then the test pattern.
For those of us in LA, the Helms Bakery truck.