Multi-tapped coils with separate antenna & tuning tap switches
Separate SW coil w/ 3 taps
2 gang tuning capacitor using just one gang for SW
Series ant. series L/C switch
CRYSTAL SET IN A WOODEN CIGAR BOX
Second Version With Series/Parallel Tuning Selection
Note: Both versions were changed from air wound coils to 1/2" ferrite rods for BC band. The Q is higher and thecoil is much more compact.
A torroid like used in the Dual Tuned set would be even better.The circuit for this set is identical to the antenna section of the Dual Tuned set with a detector added.