Shortwave receiver with feedback with circuit diagram. Transistors are S9014 but you can also use BC547C or similar. Power supply is a single 1.2 volt nickel-metal hydride battery, it also works a nickel-cadmium or a 1.5 volt battery, but since I'm rather a friend of batteries and you produce a lot of waste with normal batteries rather a battery you can recharge and use several times.
27 мар 2019