I have a maco preamp was just wondering if anyone else had one of these and do you have any problems with it? The one I have looks like it has poor designing.there is a wire on the back side of this board that has to touch the bare metal of the case in order for it to work correctly. The way the antenna is hooked up to the board is kinda crappy too. the board in mine you have to wiggle it to get a good connection if not it will throw out a god awful noise. I have tried to repair these problems but now I am wondering if it is a waste of time.