The ADC801 is not an easy component to obtain today, but the configuration is worth reference. The circuit is from National Semiconductor's Linear Applications Handbook.
The output power of this wireless intercom for the 27 MHz (11 meters) range is in the order of ½ W,...
This circuit was published in an Italian magazine Radio Elettronica in February 1976. The...
This circuit for very low current measurements was found in an American 80's documentation. The used...