This circuit is intended to switch high frequency antennas using common diodes. The circuit is from an 80's documentation appearing in other versions in this same section of the site.
This ultra-simple 9 V power source was obtained in an Argentine publication of the 1970s, but it...
We found this filter in the 1990 Motorola Linear Databook, but it can be implemented with other...
The AC125 transistor is an ancient germanium type widely used in audio stages as a preamplifier. In the...