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Czesław Klimczewski "Amplifier for the speaker '3L'"
In the 11th issue of our magazine, an amplifier with two tubes operating in a push-pull system using a transformer that controls these tubes was described. Since this transformer can not always be purchased on the market, its winding presents a certain difficulty - currently the description of the amplifier is given, in which the function of the phase inverter is performed not by the transformer but by means of a radio tube. The amplifier does not have a low frequency choke for current rectification but a resistor with a resistance of 300 Ω and a power of about 5 watts. The resistor is easy to buy or wind up on a porcelain or glass rod.