I dont' bother with a TV at all. Battery life stinks. You'll do better with a decent AM/FM radio, or better and all-band unit. Until recently I carried a Yaesu VX-5 Ham radio, which gets TV audio and just about everythign else (AM.FM Air Band, Military, TV audio...more) however, that was ditched for a tiny little $14 radio-shack AM/FM radio that kicked butt on the AM reception vs. the $370 ham radio. I still (occasionally) carry the VX-5 but our local ham organization is not really useful and the "emergency" repeater is usually off!
So a broadcast band receiver is a good idea. Right now, you can go to a local radioshack and get the Grundig multi-band radio for really cheap - they are closing them out. That's a good radio. Ideally, your radio should also pick up Weather Band..

Sangean makes fine radios for this purpose.