Set of Devices for Radio Receiver

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Product details

Cat. No. : “EDU722/066”
Includes an antenna for picking up the signals, tuning circuit for tuning to a particular radio frequency, a diode to recover the audio signal from the modulated radio signal, also includes a filter to remove any remains of the radio signal from the audio. Finally, it includes a very sensitive earphone that can produce a (barely) audible sound from the tiny bit of energy that the antenna can pick up.
capacitor with variable capacitance of 140pF
capacitor with fix capacitance~1000 pF
germanium diode, 1N34
coil-induction about 300 μH
piezoelectric headphone like the vintage 350Ω
with PCB