This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
Found in a 1968 US publication, it is a font filter. The transistor is according to the desired...
This circuit is from a factory manual from the 80s. The circuit can be implemented with modern...
This circuit regulates the alternating voltage of a load at 100 V. The circuit is from Motorola,...