This circuit was found in a Motorola documentation from 1968. The load current is 10 A. The components used are from that time and information about the transformer is not given.
This circuit was obtained from a Philips documentation from 1970. It can be built on modern...
This circuit is from an 80's Radio Electronics. The circuit has several output options for 50 mA...
This variable voltage reference uses a Norton operational amplifier. The voltage is adjusted at...