Radio Teletype Machines and Modems

Here a description of work on mechanical teletype machines and RTTY demodulators of yesteryear is to be found.


Audio Amplifiers and Processors

This section has been moved to "Audio Projects: Amateur and Home Entertainment".


(Active) Antennas

The main interest here is active antennas for limited space applications. Only one project is covered so far.


Controllers and Power Supplies

This is a place to list projects that may be of use in different sets to provide power or control temperature or other parameters.


400Hz Inverter Breadboard
The 400Hz inverter breadboard as a test bed. → click on picture to read about this experiment.