With this circuit from the September 1989 issue of Radio Electronics magazine, it is possible to receive VLF band signals on a common radio, just like the signals emitted by the previous receiver.
Suggested by Sprague in the 90's documentation, this circuit applies to AC motors. The...
The diodes in this circuit are used for waveform correction. The circuit is from Electronics Now...
This 5.1 MHz oscillator was found in a 1980s American documentation. The used operational...