This Japanese radio is from the 60s, presenting excellent sensitivity and an output power of 100mW with 6 V power from ordinary batteries. The circuit is of the superheterodyne type.
This 70 kHz oscillator is used to erase tapes in pre-recording. The circuit is from 1968 General...
This circuit for counting down pulses was found in the September 1983 issue of Radio Electronics...
-- We find this configuration very simple in a previous American publication of 1973. The...