Hello dear radio amateurs! I want to tell you about the creation of my first audio amplifier using tubes. I chose a single-cycle circuit, fortunately there were the famous GU-50 , which made it possible to get up to a couple of tens of watts per channel. I don’t believe that for any serious listener they might not be enough for a small room. They also require a solid driver - I used the common 6P15P . The anode current is high - about 0.09 A. It is set by adjusting the bias voltage on R15. I decided to abandon auto-bias so as not to lose precious watts
