What does Powerline Interference look like?
Power line interference is typical in weak over the air signals, especially those transmitted in the Low Band VHF channels (ch-2 to ch-6). However, it is not limited to that band and can occur in the Hi Band VHF channels (ch-7 to ch-13) as well. The problem will be immediately evident as two or three horizontal white bars, which could drift through your picture. These bars also have little colored sparkles inside them. The power line interference can also interfere with the audio and be present as a roaring, or frying sound. The cause of Powerline interference is arcing hydro insulators located on poles that are usually within a mile radius of the TV receiver. Sometimes this problem will be easy to fix, but more often it s intermittent, and has to be caught in the act. One rule of thumb here is that 2 lines across the TV will tell you that the interference is caused by a single phase hydro line, while 3 lines will mean that the interference is caused by a 3 phase power line. Typically,
