This low noise preamplifier has a gain of 19 dB in the 30 MHz band. The circuit is from the 80s. Transistors are from the era, and equivalents can be used. The circuit consumption is 13 mA.
This circuit is from a 1967 publication. The Triac can be any of the TIC series. The series...
This circuit was obtained in old documentation, but it is valid for modern triacs that must be...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...