- Written by: Newton C. Braga
High-frequency oscillators may be required in a variety of industrial and consumer applications, such as instrumentation, test bench, etc. Also important are oscillators of this type to repair AM or FM radio sets, receivers, tuners, intercoms, and others. A signal generator capable of producing high frequency signals with good intensity is indispensable. The apparatus described in this article produces a signal of good intensity over a wide range of frequencies and is modulated with an audio tone, which greatly facilitates its use requiring signals of this type.