I use an "AB switch" It has one output and two inputs. One for your
cable and one for your antenna. You need to run a piece of co-ax from
the single output to the TV. Plug in the input from the antenna into A
and from the cable into B. Label the A and B so you will remember which
is which. Push the A button for the antenna. Push the B button for the
cable.

I have wired our satellite receivers this way for years so that I can
use the roof dish or a tripod when we are under trees.

Janet

'Use a TV signal switch, not a video switch. You can get then at Radio
Shack, Home Depot, maybe WalMart. They have two switched inputs or
outputs and one common connection. Hook the TV antenna to one of the
inputs, the cable tv cable to the other input. The single output (also
known as switch common) goes to the tv set. Your tv may have all this
incorporated into it. Look at the back of it and see if it has inputs
(screw type coaxial connectors, called "F" connectors) labelled
"antenna" and "cable". If so you have no need for the switch box, just
hook the cable directly to the tv.
Hope this helps.'

REPLY: Jon,  Thanks much.  No..the tv just has the one coax connection
in the back, so, ill make a trip down to Radio Shack. Regards, Dave