6 V x 5 mA regulator (CB21537E)

This 6V regulator with FET was found in an old Electronic Design. FET and transistor admit modern equivalents.

High Pass Filter II (CB19679E)
The components of this filter are calculated using conventional formulas (see mathematics section of...
Incandescent VU (CB4299E)
This circuit uses incandescent lamps for the 110V or 220V grid. We found this configuration in a 1989...
5-Range Ammeter for DVM Module (CB25225E)
This 5-range current measurement circuit was found in the September 1989 issue of Radio...