Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern equivalent components. The SCR and the diodes must be according to the load current.
Found elsewhere in this section, but from other sources, this circuit is from a 1964 Electronic...
This two-transistor circuit is from a December 1964 Radio Electronics. Modern transistors can be...
This receiver can tune in the 3 to 12 MHz band with good sensitivity and selectivity, using a good...