Paraphase amplifier (T389E)

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

MW Receiver ZN414 (CB4547E)
This circuit was obtained from an English magazine from 1985. The N414 is a complete, not easy to...
Transistor Oscillator (CIR085E)
This circuit doesn't use CMOS functions, but instead a bipolar transistor. The main feature for...
Low Noise Phono Amplifier (CB4762E)
This turntable amplifier can be used for media recovery by turning it into digital form, for...