Jerry

The Big Ben is better than the 518 for jitter reduction, I waffled on a bit about it in this thread.

www.meridianunplugged.com/ubb/ultimatebb.php?ubb=get_topic;f=6;t=000945#000002

The Big Ben is not totally transparent so you might want to look out for one that's been modified (try Anthony at Aberdeen Components).

Regards
Gary