So far (> 5 years), I've had zero issues with the Chinese 3-500ZGs in my Heathkit SB-220. > -----Original Message----- > From: Mike AC2Q > Sent: Friday, August 05, 2011 11:53 AM > > RF Parts, Taylor, Greenstone...many choices. > > I need a pair, looking for user experiences?? > > AC2Q