The purpose of this circuit found in the September 1977 issue of Radio Electronics magazine is to produce the vibrato effect. It is a phase shift circuit working with common operating systems.
This circuit for frequencies of 20 to 2 kHz was obtained in English documentation from 1966. The...
Indicated for adjustment in transmitters for the 11-meter band, this circuit with analog meter was...
The circuit shown uses the LM340 but applies to other regulators. We found this setting in...