The +-15V is the worst, with more than 30mV spikes over the fundamental, and the 8.7V showing a little more than 20mV of the same spikes. 7 ), but with a strange “shadow” surrounding it this comes clear at 10uS resolution, where we can really see over imposed spikes with 8uS period, which translates into 125KHz frequency. The 3.3, 5 and 8.7 have a ripple of about 15mV peak to peak, but it is not clear to me where the 200Hz frequency (5ms period = 200Hz) comes from … The +-15V seems very clear with few mV ripple (Fig. Then I took some photo of the supply voltages at 10mV per vertical division, with the first run at 5mS horizontal division and the second at 10uS horizontal division Here is a snapshot of the replacement (Fig. The +-15V line has 820uF for C4 and C5 and 47uF for C1 and C2
