The purpose of this circuit is to measure the resistance of an antenna at the resonant frequency. The circuit is from an old American documentation for hams.
This circuit found in 1969 Popular Electronics is used to power a gas laser. The circuit produces...
This is a direction of rotation control for a small motor up to about 2 A with the indicated...
This circuit can be used to measure the frequency of a low frequency square signal. The signal can be...