There's a pretty good signal in LA on 710, unless of course you meant Louisiana, at which point I take it all back.
Sorry - Los Angeles. Some people on this board know my daughter is an actress, and I make frequent trips to Los Angeles when she works.
Which brings up a rather specialized topic - TV set DX. First of all, cast parents are not allowed to have a radio with a loudspeaker. Quiet is important. Secondly - even with headphones, you are likely to get asked to turn them off, because even what little leakage coming out of the headphones might be picked up on the soundtrack.
Another difficulty is that all that production equipment screams out RFI, so DX wouldn't work anyway. We all know about modern hotels and how bad they are, so even sitting back at the hotel is not a good option for DX.
Fortunately - a lot of the time - there are parking lots well away from the set. Zoey 101 parking lot was up the side of the hill far away from the outdoor set, I could sneak away for hours of DX'ing as long as my wife stayed on set. Unfortunately - that was the year Santa Clarita had a horrific heat wave, so it wasn't pleasant sitting in the car DX'ing. It was so bad, they revised their scripts so they could shoot at night when it was ONLY 107 degrees. That is when I did some really good DX work. But unfortunately - no Cuba on 530. It was completely blank. I have logs of everything, and the radio in our car was really good. But there are so many stations covering clears now I didn't have a chance at things like Chicago.
NOS (Nick on Sunset) and the nearby Disney studio are right in downtown Hollywood, a lot of interference at those sites. Plus parking is too close to really be able to DX on the car radio. They shot outdoor scenes for Victorious right in the parking lot! Some of the studios in the valley like Paramount and Sony are better, you can get some pretty good DX. Of course - you ARE in a valley - which blocks just about all FM except local. Because most of those sets are indoors, there wasn't a lot of nighttime car DX - they shoot in the daytime. And - they like parents to stay in the studio so they can get genuine canned laughter (ICK).
All in all - I find Los Angeles to be a fascinating and challenging area to DX. FM especially can vary widely depending on where you are, in a lot of cases 50% of the weaker stations are completely different. 30 miles from the LA towers you can be over the mountain and have first adjacents. AM is so cluttered as to be almost un - DX'able even in daytime. Sure, things like that monster station on 690 from Mexico are there, at night San Francisco stations are there, I usually don't have too much trouble with things like KSL and KOA. But it occurs to me that those are stations I was already familiar with because I am from Texas. I am probably missing interesting things from Seattle, etc. that I never have known about. So - next trip I may go out there armed with a better strategy than aiming for Texas and things I know.