We found this circuit in a 1964 Electronic Design. It divides the frequency of a 20 MHz signal by 2. The circuit uses a transistor from that time. Details of the coils were not given.
This 1-transistor circuit for currents up to 50 mA was found in the August 1974 Radio Electronics...
This circuit is from 1997 when Camcorder-type video cameras that used powerful batteries were...
This is a commercial circuit for an AM radio with 4 transistors, published in a Japanese magazine in...