Hello and thank you for reading my post. For some time now, I've had this nasty broadband noise on 40m (see the attached file of a screenshot from my WebSDR receiver). Interestingly enough, the noise switches off exactly at 12:00 noon, and switches back on again at 6:00pm (Pacific Time). When this noise is being generated, it's 40db over S9, and 40 meters is totally useless, I can't hear a thing. I have HF in my mobile so I drove around the neighborhood while listening to my IC-706mkIIg on 40m. The noise is strongest about 4 houses down the street. But I have no way of knowing which side of the street it's coming from. Oddly enough, where the noise is the strongest, there is a good sized ground mounted power transformer (maybe 3'x3'x3'). I wouldn't expect this to be a power transformer though, since the interference switches on and off on a regular schedule. If I had to take a guess, I would imagine that this is being caused by a Pool Pump with a VFD. As I said, the noise is very strong. It's radiating approximately a quarter mile in all directions from the epicenter. If anyone could identify this noise, I would certainly appreciate your help. If you want to see it live, and hear it live, just visit my WebSDR (http://kj6eo.com:8901) at any time besides 12 noon and 6pm Pacific Time. Thank you in advance for any guidance or suggestions you might have.