The magic
receiver

from the Czech magazine
RADIOAMATER

No. 7-8 / 1945 (!!)

I assembled this apparatus
as a jung boy. It worked
really wonderful.

L1 + L2 = DN 40 mm
L1 = 200 turns of Cu 0,5 mm
L2 = 120 turns of Cu 0,8 mm
C = 500 Pf
D = crystal dotector
K = 500 Pf