This fuzz distortion circuit was found in old RCA documentation. Equivalent transistors may be used and the input signal must be at least 1 V wide.
This simple metal detector was found in a 1960 Sylvania transistor manual. The phone must be high...
This is one of the many versions of this type of indicator that the reader can find on our...
Found in an English publication from the 1980s, this circuit can be built with equivalent...