Are you sure the voltage jumps aren't just a feature of the supplies regulation and changes in load? Looking at my system there are longish periods of "noise" at about 50 mV peak to peak with section of jumps of about 20 mV P-P. the "jumps" may coincide with the detection of strikes, and thus the sending of data and flashing of several LEDs.
Both these images are the same supply, without inline filter:
![[Image: attachment.php?aid=2674]](https://forum.blitzortung.org/attachment.php?aid=2674)
With inline filter:
![[Image: attachment.php?aid=2675]](https://forum.blitzortung.org/attachment.php?aid=2675)
The controller objected to the unfiltered supply but is very happy on the filtered. Vertical resolution of 1 V/div.
Both these images are the same supply, without inline filter:
With inline filter:
The controller objected to the unfiltered supply but is very happy on the filtered. Vertical resolution of 1 V/div.