This commercial signal follower was found in a 1967 Japanese magazine. It uses germanium transistors and provides a speaker output without the need for a transformer.
This unijunction transistor circuit was found in Radio Electronics magazine from July 1968. The...
The Variable Frequency Oscillator (VFO) or Variable Frequency Oscillator shown in the figure can...
We found this circuit in an English publication from the 80's. The circuit uses current components like...