A new type of warble tone generator

In testing various types of apparatus used in electrical communication circuits, it is often desirable to obtain a single average reading over a range of frequencies. For this purpose a “warble” tone, or a tone the frequency of which varies cyclically over the desired range, is used. In this paper is described a new type of electronic tube warble tone generator which utilizes a “relaxation” oscillator and has no mechanically moving parts.