This MW receiver was found in a 1950 Electronic Experimenter and uses two tubes. The coil is formed by a grid coil woith 80 to 100 turns of 28 or 30 AWG wire on a cardboard tube with 2,5 cm of diameter and the grid coil is formed by 10 turns of the same wire on the same tube. The phones are high impedance types and the antenna a long wire.
