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I have had a Dual 601 turntable for many years, perhaps 50, and it used to work great. Sometime ago it started acting strange as the motor became unstable and would power up and lock on a higher RPM than proper. From the information on the internet it seemed that this was a design problem and would not be easily solved. I tried to fix it anyway. I tried external electronics to see if I could make it come up to the proper speed. I even messed with the pole spacing on the stater but the internet h ...
This is a second build of of a Simple DC Electronic Load project using information that I learned about curing Oscillations in a separate discussion: https://www.element14.com/community/thread/64985?start=15&tstart=0 The knowledge that I received from other element 14 members as well as things that I learned from the bad decisions that I made on the first build made me want to give it another try. Here is the blog from the first build: https://www.element14.com/community/people/jw0752/bl ...