The circuit presented is a Japanese commercial radio for AM with 50 mW of output power, powered by 9 V. The circuit is from the 60s, having been found in documentation of the time.
This circuit is from American documentation from 1973. It can be used to indicate when the logic...
This circuit is from an old documentation. However, it can be mounted with modern equivalent...
This interesting circuit, found in an old American publication, measures alternating signals in a...