In fact, this circuit from the 60's applies to photographic printers of the time, timing the lighting of a 20 W lamp. The components are from the period.
Depending on the components, given in the table, this circuit can amplify signals of 100 MHz or...
In this circuit, the relay remains closed by activating a lamp, for a time that depends on the...
This 6-transistor Japanese commercial radio was manufactured in the 1960s. The receiver is a super...