Wade, This sounds like a defective insulator or cable clamp sparking on a power pole. Such interference can carry for many miles. Try using a portable radio with a handheld Yagi antenna to pinpoint the source. The power company must repair this defect.
73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kc0mlt Sent: Monday, April 26, 2010 7:24 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] AC buzz on VHF Hello all, I am in the process of putting up a 2m repeater on what I would consider a pretty vacant site. There is only one other machine (70cm repeater) currently out there. My concern is with an AC (60Hz) buzz that comes across on the VHF band. It doesn't have a signal to it that will key uip a radio, but when you receive an actual signal you can hear it. We have heard this on both handhelds and mobiles. This site is unique as it is a dual tower with old (unused) microwave panels and drums on the bridge at the top of the two towers. The microwave equipment is no longer hooked up. We have had the power company totally unhook the power to the site and the buzz was still present. The nearest high voltage lines are about 1.5 to 2 miles away. You can not hear the buzz on any AM receiver. Does anybody have a clue as to what this could be and what we could to do prevent it? We have some thoughts on the grounding of the guy wire being a cause but we are unsure of that. Any ideas would be greatly appreciated! Thanks Wade KC0MLT
