The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. 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...