This General Electric circuit, in a documentation from the 1960s, allows the use of high resistance resistive sensors with unijunction transistors in a relaxation oscillator.
This circuit uses a loop antenna to receive and amplify signals from the 60 kHz long wave band....
This circuit was obtained from a 1967 magazine. The magazine no longer exists, but the circuit can still...
This two-transistor preamplifier was found in a 1960 Sylvania transistor manual. The output...