This is the circuit of a European commercial amplifier. It was published in Radio Electronics magazine in September 1958 and has a power of 5 watts with good sound quality.
The sensor is an NTC and in the connection as shown in figure (a) we have the trigger with the...
This oscillator configuration with the operational 741 was obtained in a European documentation from the...
Found in Motorola's 1965 manual, this full-wave dimmer controls a load that depends on the used...