Michael,
The TV antenna will probably help your reception. Try
the center conductor on the radio's terminal, or short
both inner/outer conductors and try that. Use whichever
works best. Inside/outside the house won't make as much
difference in what you hear as how high the antenna is.
'Doc

PS - Alternate method. Tie rock on end of a long piece of
wire. Throw rock over roof. Watch out for windows.