Found in a publication by Gernsback from 1960, this circuit uses germanium transistors of the time and commercial coils. It can be changed to operate with modern transistors and other wavebands.
This sophisticated audio generator based on the XR2206 IC was featured in the May 1980 issue of...
This TTL circuit consists of a frequency divider or converter that has values selected by a...
The indicated circuit generates frequencies in a range from approximately 500 Hz to over 5 kHz...