This low frequency divider uses unijunction transistors. The bipolar transistor can be a BC548 and the zener diode Z4XL can be a 12 V zener. The circuit was found in a 1967 publication.
This circuit was found in the component manual itself. The frequency can be changed and the power...
This crystal-controlled circuit was obtained from a 1980s documentation. The power supply should be 5...
The critical component of this amplifier is the output transformer. We found the circuit in an old...