The S-200 is known as the 'LEGIONNAIRE' and was introduced in 1965. It is primarily a US and international broadcast receiver. If it has been of the air for a long time the selenium rectifier as well as the electrolytics should be replaced. Best Regards, Walt Cates, WD0GOF, http://www.myhamshack.com/WD0GOF/<http://www.myhamshack.com/WD0GOF/>