Original poster: "Jason by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com> Hi all, Just finished my 'Terry Filter', and I was wondering what the failure state of a MOV is... I assume its failure state is low resistance, to makie it comply with ISO9901, but I could be wrong. When it fails, is the resistance high or low??? Thanks, Jason