The circuit shown is from National Semiconductor's Linear Applications Handbook. It makes use of the LM78S40 which is not an easy component to obtain today.
Antenova Grandis antennas can be purchased from Mouser Electronics for frequencies from 868 MHz to...
This circuit is from a specialized documentation in 1992 FETs. The L1 coil has 0.07 uH with...
This circuit makes use of germanium transistors, providing a fraction of a watt power. It was...