and second concentric electrical coil wound in the same directions with the convolutions of the one coil between the convolutions of the other coil and with one end of one coil connected to the opposite end of the other coil and a third electrical coil extending within the first and second coil if it is desired to tune the parallel resonant circuit application_number US 93638978 A description in the past parallel resonant circuits 10 as shown in fig1 have included a separate capacitor 12 and electrical coil 14 connected together in parallel as shown for connection in other electrical circuits at points 16 and 18 parallel electrical circuits 10 may be resonant at a predetermined frequency determined by the inductive reactance of the coil 14 and the capacitive reactance of the capacitor 12 further the frequency at which a parallel resonant circuit 10 is resonant may be varied by making either the capacitor 12 or the coil 14 variable parallel resonant circuits such as circuit 10 are however more complicated and therefore more expensive than necessary thus with such circuits the capacitor 12 and the coil 14 are separately produced and then mechanically connected together often the manufacture of each component and the assembly of the circuit 10 are accomplished at different locations with shipping and material handling occurring between or during each of the manufacture of the capacitor and coil and the securing of the capacitor and coil together in the finished parallel circuit the parallel resonant circuit of the invention 20 as shown best in fig2 includes a first coil 22 having opposite ends 24 and 26 and a plurality of separate convolutions 28 the parallel resonant circuit 20 further includes a.