Found in old documentation, this circuit can use modern equivalent components. The signal has good strength thanks to the use of a power transistor. The Q1 transistor is a unijunction of the time.
Any general-purpose transistor can be used in this circuit that generates a rise ramp that can be...
Found in a 1965 Electronic Design, this circuit can be made with modern equivalent transistors. The...
The voltage comparator used in this application is the NCX2220 from NXP. What this circuit does is...