Radio problem in 93 SL2

I'm having a strange problem with the factory radio in my 93 SL2. After I've been driving for about 30 minutes, I get very poor radio reception where it should be strong. I try scanning the channels and it cycles endlessly, unable to tune to a signal.

If I park the car and try again an hour later, the radio reception is fine. This never used to happen.

Any ideas?

ok 1 check your fuses just in case. 2 take the deck out and see if the antenna connection is tight. do you have a different antenna? like a shorty antenna or anything like that could change it.

if worse comes to worse its your deck that has a problem and you can find them on ebay for like 10 bucks

Ok, I'll take a look at my fuses this weekend. Wouldn't you expect the radio not to work at all if the fuse was bad, rather than just getting really poor reception?

I haven't changed the antenna, pulled the deck out, or anything. The strange thing is that everything works great for the first 30 minutes after starting the car.

maybe something is getting too hot?