CUI VFM-15C filters are available on eBay for around $12 and work reasonably well. They combine a common-
mode choke with a high-side differential choke. Honestly, I was expecting better performance from them, given
their professional-looking design and construction, but I suspect the common-mode being only a single stage was
their limiting factor.
However, for the low price, they're probably worth it. If necessary, you can just chain two of them together for
improved filtering. This filter is for DC ONLY.
.png)
