|Ver. 2 PCB on test bed.|
Just a brief update on the tests with PCB Ver. 2 for those following. I have fully connected the op-amps and output transformers and the waveforms look excellent.
They are very clean, stable and no signs of noise or ripple. So far thumbs up. You can see the new layout in the photo above.
|Scope shot of dual sine waves at 60Hz|
I will now have to proceed to rewiring my turntable for dual power, for each coil, and drive the turntable motor. May take a few days, I have to clear some space on my makeshift bench.
So far no tweaking of any components was necessary, so values look acceptable, at least before load and current testing starts.