This regulator circuit is from Motorola documentation from 1969. It makes use of an integrated regulator of the time. With the indicated transistor, a current of up to 5 A can be obtained.
This simple expandable circuit was obtained from a Popular Electronics from the 80's. The supply...
The frequency of the LC resonant circuit must be the same as that of the crystal and the JFET...
This circuit was obtained in a Popular Electronics of 1991. The magazine no longer exists, but the...