Economical Transistor Radio

Posted on Feb 6, 2014

The schematic diagram shows an audio stage with a common-collector circuit. This does not damp the tuned circuit, but instead actually increases its response. This yields good sensitivity and selectivity. Due to the low supply voltage, the subsequent audio amplifier needs three transistor stages. The volume is adjusted using the potentiometer. Thi

Economical Transistor Radio
Click here to download the full size of the above Circuit.

s radio works well using an internal ferrite rod (around 1 cm diameter and 10 cm long) with a winding of around 50 turns of enameled copper wire. With a two-meter external wire aerial, you can receive even more stations. This radio is not only economical in terms of components, it also needs very little juice`: since the current consumption is only 10mA, an alkaline AA cell will easily last for around 200 hours of operation.

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