This 4-tube amplifier with 6W of output was found in an American manual from 1947. The sound quality is excellent.
This circuit was obtained in 1974. It serves to indicate the tuning of stations on a common...
This VCO with the CMS 4046 was found in the August 1994 Electronics Now magazine. The frequency is...
Small variations in the resistance of the subject's skin holding the test leads are detected by...