Simple AM Radio Receiver

 



This circuit is a simple AM radio receiver . The NPN transistor, 2N2926, is used to amplify the RF input signal and amplify the detected signal .Detector in this circuit is formed by OA91 diode, 18K resistor and 47nf capacitor. The PNP transistor, 2N3702, is used to amplify audio signal and drive the speaker. T1 and T2 has been described at the following table :

Component

Description

T1

Primary=80T, Secondary=8T
Wire diameter is 0.30 mm
Ferrite Core Diameter = 6 mm

T2

Primary=50-80 Ohms, Secondary=8 Ohms
Audio Choke ( speaker matching choke )

Reference : " Hobby Electronics "

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Last Updated : February 15, 2002

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