Original poster: "Justin Wright by way of Terry Fritz <twftesla-at-qwest-dot-net>" <justin-at-tracesofnut-dot-com> Hi All, Will a small coil suitable for running on a desktop in my office cause problems with pc's and phone systems etc running in building (ie next office)? I have read that solid state coils are quieter. Are they less likely to cause interference? Regards Justin.