This reflex receiver for the mid-wave range employs germanium transistors of the time. We found it in an English documentation from 1967.
This interesting circuit was obtained from a 90's EDN. What it does is generate negative voltages...
September 2017 - Arduino Lucky Shield shields containing a 5 V OMRON-g6RL relay, a Everylight...
Figure bellow shows how the 4510, a divide-by-1U, up/down counter with three-state outputs is...