Re: [RE-wrenches] Bergey XL.1 HummmBuzzz

2019-09-30 Thread Roy Butler
Matt, What you are hearing is alternator noise. It's caused by the vibration from the permanent magnets passing by the alternator coils. All turbines produce some alternator sound, some more than others and the tower itself can act as a resonator, amplifying the

[RE-wrenches] Bergey XL.1 HummmBuzzz

2019-09-30 Thread Matt Sherald
Friends, I've exhausted the Bergey tech support expertise on this issue and I'm hoping someone on the list may have a solution to share. I have a customer with an older XL.1 on a tilt-up tower. The machine has been in place since 2007. I've done some work to it over the years including blades,