Hey, something I can answer intelligently! :-)

In your attic, make a resonant loop of wire as big as possible (think
magnetic loop design without the feed coupler - lotsa programs out there
to design one). That will enhance the field throughout your house.

I've tested and used them for AM radio and cellular phones with success.

You'll need a radio receiver in your basement (or wherever "undergound"
is in your home and someone to confirm peak strength as you tune. FRS
talkies come in handy for this ;-)

--
Gregg "t3h g33k"
http://geek.scorpiorising.ca
*Ratings are for transistors, tubes have guidelines*