Speed regulator. I have a technics 1210 mk2. The turntable speed has started to osolate. This happens at any speed. Do you have any ideas???

First and foremost, are you located in the U.S.? If so, make sure your unit's voltage is set to 115V rating. The switch is located under the turntable platter. All you need is a flat head screwdriver to turn it to the proper voltage. If it's on 220V, you need to change it. If you are not in the U.S., or it is already set @ the proper voltage rating, your problem could be one or many issues with the drive, and pitch control. There are various resistors, capacitors, IC's and variable resistors, which control the drive. Any one of these could have gone bad on you. Do you have a runaway operation, or is it doing that back and forth movement? In either case, this cannot be self repaired, and you will have to take it to a qualified service center for repair. Cost will run you anywhere from $60-120 - if they go higher than that, they either do not know what they are doing, or they are trying to pull one over on you. We work on these on a daily basis, and should cost you more than that. However, prices do depend on where you live (we are in NYC). Good luck!