I notice in the Y2k manual that the values for R502 and R503 apparently were selected for an optimal value within an appropriate range. Can someone tell me what factors control(led) the selection of these values. It appears that R503 might not be one I would care as much about as I rarely if ever use a 100 cycle bandwith, but R502 might be a useful one to optimize. Any comments? Thanks, Barry - N4BUQ