This 1.5W tube amplifier was found in an American documentation from 1947. It is a direct rectification circuit without the need for a power transformer.
This circuit was found in a 1966 EEE. It is intended for automatic switching of the measurement range of...
This circuit was obtained from a Popular Electronics of the 90s. The SCR is of any type and the...
This is the basic receiver for the CIR12025 that consists of the transmitter. The circuit is...