Thanks Michael. I had not considered shutting down various other home AC power circuits for my tests. I’ll try it somehow, but it will be difficult (wife probably not going to appreciate me shutting down her internet/satelliteTV/phone/lights just so to test my radio system, but maybe I’ll wait till she’s napping, ha). Some good nuggets there and your hybrid method seems like a sound approach. And thank you also Gman and Admiral: I am 11.2 km (6.95 miles) LOS from the Greater Houston antenna farm. Wow! I don’t know why I didn’t think about it before. Here is some info from the internet about the farm: “…eight antenna towers that provide television and FM radio broadcast capabilities for the Greater Houston area, serving 46 television stations (including digital, low power and translator stations), and 23 FM radio stations.” Two of the towers there are about 2000 feet high and so must be some of those “angry RF firebreathing broadcast towers” Gman was talking about. Being only 7 miles away, it’s likely I’m being blitzed as you suggested. This does explain some things, but it also leaves me with a few more questions. Are the static blasts I’m receiving simply bleed-over from other frequencies, and not actually on 462.650?What triggers the blasts? They only seem to occur randomly while someone is modulating, never during standby, and only last for 3-5 seconds, maybe once per minute or two.Why only is my one antenna is being affected? Is it because it is the highest, and is external to my house/roof and thus the best for receiving? The lower, inside the attic mounted antenna is not picking up the blasts even when I swap my primary radio to use it.I didn’t know what intermod was, or a preselector, but after you mentioned it, I Bing’d it and now have an idea. I found THIS article on Intermodulation. It is a long read, and way over my head, but the first section on “Symptoms” helps me understand things better. A preselector could be a solution (albeit not a cheap one). Such is my luck living so close to the fire-breathers (Gman, you've coined a new phrase). And thank you too WRAK968. I did try shutting down and moving my cell phone away from the radio (but not my wife’s phone because she stores it some 25+ feet away from my radios, but perhaps I’ll revisit that). And I did move the Wifi as far away as I could, about 8 feet (side note: this seemed to have helped for a day or so, static burst volume was reduced, but not eliminated, and the test was inconclusive because the higher volume bursts returned the next day….I don’t know what to think of that). I’m not giving up. The fight goes on. Thanks much guys, for all your input. I very much appreciate this myGRMS.com website and you pros who respond to people with issues like mine. Thomas …