Crosley 51, regenerative, battery set, ca. 1924


 

 

This set couldn't be much simpler. An 01A regenerative detector and an 01A audio amplifier. What you can't see very well is the very neat "book" condensor, which is uded for the main tuning. Rgeneration is controlled via the coupling between two spider-web coils. The movable coil is just visible in the above picture. This is a fun little set to use. Works better than you might expect.

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