The closest example schematic for a single transistor, two diode charge pump detector reflex regenerative HF/AF amp stage direct coupled a ferrite rod antennae that I have been able to find is the Ladybird TRF radio by George Dobbs, (G3RJV)
http://www.mds975.co.uk/Content/george_dobbs_trf_radio.htmlIf you want to understand it enough to draw the actual schematic of your radio, read the book, but remember, it was written for Germanium PNP transistors, so the positive rail is at the bottom going to the transistor emitters. To rearrange for modern Silicon NPN transistors, the bottom becomes the negative rail, still going to the emitters, all diodes must be reversed, and usually some attention to the base bias resistor networks is required, due to their higher Vbe and HFE. The feedback capacitor C3 can actually be two insulated wires twisted together as a gimmick capacitor (
http://sm0vpo.altervista.org/begin/gimmik-0.htm) or even just a carefully positioned wire rather than a discrete trimmer or fixed capacitor, so its presence may not be obvious.
Edit: Jim's just found a NPN silicon version of a non-regenerative reflex stage with a two diode charge pump detector. You will have to see which is closer to your set's circuit. The first stage circuit in your schematic is a total mess, and the second stage has B and C swapped.