Trials on a number of assorted audio transformers, from the junk box, were not in vain. A push-pull output transformer, intended for a 1 W germanium transistor audio amplifier, gave excellent results.
|Series-tuned Loudspeaker Crystal Radio - Schematic|
A discarded blister pack serves as the base.
|Series-tuned Loudspeaker Crystal Radio|
My 'Homebrew Horn Speaker' and 60' wire antenna offer the perfect match for this crystal radio.