This circuit was suggested by National Semiconductor in one of its manuals. The LM108 integrated circuit, uncommon nowadays, can be replaced by an equivalent. The power supply must be symmetrical.
This circuit is for collectors. It is the circuit of one of the most popular transistor radios of the...
This circuit is from an April 2000 Poptronics. The magazine no longer exists, but the circuit can...
This circuit was found in a 1977 Radio Shack documentation. The unijunction transistor can be...