Method and apparatus for magnetic field suppression using inductive resonant and non-resonant passive loops

An electrical circuit for suppressing a stray magnetic field created by a cathode ray tube (CRT), the CRT having an annular yoke having a front face and contained within a CRT display enclosure, said circuit comprising:

• a) a first electrically insulated conducting loop tangentially contacting the front face of said CRT yoke and magnetically coupled thereto, said first loop projecting laterally to the sides of said CRT enclosure and forward to the front of said CRT, said first loop further producing and induced magnetic field opposing that created by said CRT yoke;
• b) a second electrically insulated conducting loop tangentially contacting the front face of said CRT yoke and magnetically coupled thereto, said second loop projecting laterally from said yoke to the sides and rearward to the back of said CRT enclosure, said second loop further producing an induced magnetic field opposing that created by said CRT yoke;
• c) capacitance means coupled to said second loop for passively increasing induced current in said second loop;
• and
• d) means for supporting said first and second loop within said stray magnetic field,
• whereby said first and second conducting loops held within said stray magnetic field passively produce an opposing magnetic field to reduce said stray magnetic field emitted from said CRT display enclosure.