Original poster: "Mccauley, Daniel H by way of Terry Fritz <twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com> Anyone know of a good source for inexpensive or used line filters? I need to place one in line with the input on my NST. I checked all the major supplies (newark, allied, digikey, etc...) and they seem pretty expensive for a good quality one. Thanks Dan