Found in a 1968 American documentation, this circuit generates sawtooth signals whose rise and fall times are determined by C1 and C2. Transistors support modern equivalents.
Using power transistors of the time, this source was published in Radio Electronics magazine in...
Found in an Electronic Design from the 90's, this circuit uses common components. The circuit is...
This circuit uses a magnetic phone containing 3 germanium transistors. This is a Japanese...