3-way control (CB7047E)

This is a simple circuit to control a set of lamps from 3 different points. We found it in an old Popular Electronics.

Low frequency linear modulator (CB7305E)
Found in an Electronic Design from 1968 this circuit generates a linear sawtooth signal modulated...
Tuned Shortwave Antenna (CB25749E)
This shortwave preselector was found in the July 1994 issue of Radio Electronics magazine. The...
Low Noise Preamplifier for Magnetic Capsule (CB25830E)
This circuit is based on an operational amplifier that must be powered by a symmetrical source. The...