Paraphase amplifier (T389E)

This 6C5 tube circuit was found in a modern tube design manual. The circuit applies to other equivalent triodes.

Simple Regulator Using Common Diodes (CB20292E)
In this circuit we have the way to use common diodes to obtain low regulated voltages in a single...
Fast Current Sensor with Alarm (CB5895E)
This circuit is from a 2005 Linear Technology manual. The circuit uses an LT6700-3 and has an...
Crystal Oscillator (CB6522E)
The crystal frequency of this circuit found in an American documentation is limited only by the...