Builder	V.A.A.M.
Model	Galena receiver
Year	1930
Bands	OM
Tubes	None
Tuning	Simply LC input circuit
Notes	Works only with the earphone
Power	None needed !
Size	10x17x12

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Note

This is a typical galena receiver, working without power supply. The radio stations was tuned with the external coil and the variable capacitor, after delevloped from the galena diode and sent directly to the high impedance headphone. This kind of receiver required a great antenna and ground wires..

Detailed viev of the galena detector