|Series-tuned Loudspeaker Crystal Radio - Schematic|
A power transformer, with its inherent thick conductors, appeared to be the ideal substitute for a low-loss output transformer.
Trials with transformers rated 230V/24V-2A, 230V/24V-5A and 230V/24V-15A proved the last one to be the best.
|Loudspeaker Crystal Radio|
Performance was also quite good using the parallel-tuned configuration.
|Parallel-tuned Loudspeaker Crystal Radio - Schematic|