Core Power Technologies

@tuffy72561

This is a huge help because I was thinking it has to be a use related issue being the fact it’s so sporadic. I’ll have to pay attention to what is being used next time it happens. Odd though that a dedicated line would still give this type of issue. Maybe this is where the Deep Core would come in to play to filter this type of noise out. Thank you much

No properly designed power conditioner should hum. That one hums in response to a curling iron being used merely indicates faulty design or a manufacturing defect.

@ celander and anybody else for that matter. Has anyone opened up one of these units? I did!! In that little black box is a balanced transformer and a breaker. That’s it! No electronics or fancy crap. So if it’s a design issue, maybe that’s why? Thoughts??

Many transformers will hum under certain conditions.  Really good quality ones, produced under high levels of QC, usually don't.  A lot is in the QC.  If the winding is a little "off", an individual example of a brand with a generally good reputation may still hum.  I think that's why they thought they could solve the problem by sending you a replacement--if only they had.

Or a transformer might hum if it's being starved for current. you could measure your incoming voltage and if it's high that I could be part of the problem.