Old Technics turntable got a buzzing sound

Hi,

I recently got an old Technics turntable, which is totally sweet, but it doesn't work that well. When I connect it to my receiver the sound is very, very low. I have to max out the volume on the receiver to hear anything, but when I do that I hear this sharp, electric buzz, which is probably not a good thing. It sounds like when a cable is loose, or like sometimes when you plug in a cable halfway into something.

Could this be due to old cables or maybe a difference between modern electric sources and the old ones or something? I'm pretty new to everything Hi-Fi.. This thing is probably 30 years old or something.