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 90s Practical Wireless, this circuit provides 8 to 10 W of output with a gain of 14 dB....
This circuit is from a Maxim manual and can be used to power shields from batteries. The circuit...
In the figure below we have the connections of an automotive alternator in a triangle. The diodes...