A receiver portion of a radio includes an analog circuit for determining a peak amplitude in a way that eliminates or reduces the effects of frequency errors that are introduced by crystals within filters and other devices. An example of a method is a method of drilling a well bore in a subterranean formation. The isolator can be used to prevent boosting of one capacitor from negatively affecting a charge of the other adjacent capacitor to improve the efficiency of the voltage booster. The controller repeats erasing, writing, and reading in each block in the user area using a cell applied voltage higher than a voltage used in a normal mode, and enters a block where an error has occurred as a bad block. 1% to about 80%, by weight of the composition, of a polyanionic ammonium surfactant; a substantially non-aqueous carrier; and a solid inorganic base having pKa equal to or greater than 10. The horizontal well is provided with filters, which are porous members.