BACK TO STEREO

Hi! I am safely back from the shark infested area of the Red Sea, this is the reason why there were an absence of posts. This season is rather busy. However I managed to start works on my latest ES series collectible – the MosFET SONY TA-F590ES. I was surprised to find out it does not seem any different from 570ES, 505ES and 606ES – the same chassis, the same (more or less) boards. Of course, output stage is somewhat different for models with bipolar transistors, but otherwise…. once again we must deal with dirt and oxidation problem. The inter-boards connectors and input selector, volume attenuator are so dirty they became a kind of semiconductor. See what they did to nice sine wave I feed into the amp. A knock there, push-pull here and the sinus is once again visible. So… the cleaning begins — once again. More will follow.