| 摘要 |
PURPOSE:To prevent the constitution of a tuning circuit with a tuning winding of the 2nd oscillation coil and the 1st padding capacitor at the selection of the 1st band by connecting the other end of the tuning winding of the 2nd oscillation coil to the 2nd switching element. CONSTITUTION:The constitution of a tuning circuit by the tuning winding 22a of the 2nd oscillation coil, its accessory capacitor 26 and the 1st padding capacitor 23 at the switching of a band changeover switch from the 2nd band to the 1st band is prevented by connecting the other end of the tuning winding 22a of the 2nd oscillation coil 22 to the 2nd switching transistor 32. A signal of a tuning frequency formed by the 1st oscillation coil 21a, its accessory capacitor 25, the 2nd padding capacitor 24 and a variable capacitor 29 is obtained stably from the oscillating terminal at one end of the base winding connected in series with the 1st and 2nd oscillation coils. Since the number of components is less, the cost reduction is attained.
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