I continue the story about a single-ended tube SE amplifier on a pentode with a non-standard connection of the output audio transformer - with a separate grid winding and an additional cathode winding. In this circuit, it was possible to obtain nonlinear distortion (THD) below half a percent with an output effective power of about 3 watts. The calculated lower frequency of 25 Hz justified itself in the working model. And it turned out to be even a little lower with a good sine wave. The amplifier circuit is recommended by Channel viewer Anatoly / @esas-aleko In this video, I will show the assembly of the calculated output transformer for the SE amplifier, tested in the previous video. You will see how well this single-ended tube SE amplifier reproduces a sine signal. There was an error in the video slide! The anode winding of the transformer is 2060 turns! *** You can help develop the Channel: Yandex Money: https://yoomoney.ru/to/410013004521132 *** Links to videos: "Tube SE amplifier. Test drive of pentode switching modes" • Tube SE amplifier. Test drive mode... "Tube amplifier. Transformer calculation" • Tube amplifier. Transformer calculation... Link to the archive of video materials: https://drive.google.com/drive/folder... 00:00 Channel Unknown Physics - welcomes you! 00:18 Amplifier with non-standard connection of the output transformer. 00:40 Transformer winding calculation map. 02:00 What I will make the output transformer from. 02:30 Disassembly and device of the factory transformer. 04:49 Drawing for assembling the transformer coil. 05:05 Assembling the transformer coil. 07:01 Sectioning the output transformer windings. 07:19 About the winding wire diameter. 07:38 Error when winding the transformer coil. 08:39 Phasing the transformer windings. 10:40 Adjusting the thickness of the non-magnetic gasket of the transformer. 11:25 Assembling the transformer. 12:51 Measuring test resistances. 13:38 Measuring the resistance and inductance of the transformer windings. 15:38 Measuring the input impedance of the amplifier's final stage. 17:05 Measuring the output impedance of the audio amplifier. Damping factor. 18:59 How the amplifier reproduces a sine signal at low frequencies - from 20 Hz. #Output_Transformer #Vacuum_Amplifier #Distortion_Test Videos in the form of short stories and tales about Physics in the world around us are released every week. If you liked the story - like and subscribe to the channel so as not to miss the continuation! QUESTIONS can be asked in the comments to any video, on social networks and by e-mail to the channel: [email protected] I answer all SPECIFIC questions. I hope that your questions and joint answers will help make the channel "Unknown Physics" more interesting! ************************************************************* The channel has many playlists that contain videos about birds and animals, about HANDICRAFT, DIY, HUMOR, entertaining PHYSICS, stories about TRAVELING, YUMMY, TRICKS, how to make a cartoon and much more ... You will definitely find a video according to your interests! The CHANNEL NAVIGATOR will help you navigate the channel. LINKS to the channel's videos are posted on personal pages in social networks and in groups: Add yourself as a FRIEND! (When adding, PLEASE write - where are you from and on what issue) e-mail: [email protected] VKontakte: http://vk.com/afon2015 Odnoklassniki: https://goo.gl/VdSsCY Twitter: / afanasy83 Facebook: / afanasy83 Skype: afanasy83