This experimental circuit was found in a technical publication from 1976. The diode can be of another type, since tunnel and the supply are made by a single battery of 1.5 V. The adjustment pot R3 can be of 470 ohms of wire. L1 and L2 depend on the tuned frequency. For the medium wave range L2 has 50 + 50 turns of wire 28 in a 1.5 cm tube and L1 has 20 turns of the same wire over L2. CV is an old transistor radio variable and T1 is an output transformer. The high impedance output can be applied to a crystal or ceramic headset.
