In this video, I continue my story about vacuum tube audio amplifiers. By popular demand, I will tell you about choosing vacuum tubes for an amplifier and show you how to set up vacuum tube amplifier stages using an oscilloscope. I will use the Shmelev complex to evaluate various schematic solutions for driver stages on 6N2P and 6N23P vacuum tubes. I will tell you about a little-known method for stabilizing the operating point of a vacuum tube. *** You can help develop the Channel: Yandex Money: https://yoomoney.ru/to/410013004521132 Web Money: Z546631268395 *** Link to the archive of video materials: https://disk.yandex.ru/d/mQCYlbVG1H1bsQ Link to the video "Kreimer's Hybrid Vacuum Tube-Transistor Amplifier" • Hybrid Vacuum Tube-Transistor Amplifier... 00:00 The Unknown Physics Channel welcomes you! 00:05 Video about comparison of lamps in different driver stages. 01:40 A little about 6N6P and 6N3P lamps. 02:34 Appearance of the amplifier breadboard. 02:55 Adjustment of a simple triode driver stage - 6N2P lamp. 03:40 Methodology for adjusting the amplifier stage using devices. 05:40 Adjustment of the amplifier stage using an oscilloscope. 08:44 On the need to calibrate the Shmelev complex. 10:32 On measuring signal distortion using the Shmelev complex. 12:48 Calibrating the Shmelev complex. 16:33 Amplitude-Frequency Response of a Simple Triode Driver Stage - 6N2P Lamp. 16:52 A Simple Triode Driver Stage, but with an Increased Anode Current - 6N2P Lamp. 17:43 Simple triode driver stage with a capacitor in the cathode - 6N2P tube. 19:05 Simple triode driver stage with a dual tube - 6N2P tube. 19:55 About the spread of electron tube parameters. 20:29 Setting up the circuit of a simple triode driver stage with a dual tube - 6N2P tube. 21:12 Capabilities of the Shmelev complex - comparison of different frequency responses on the screen. 21:34 Mu-follower in the driver stage of the amplifier - 6N2P tube. 22:58 Mu-follower in the driver stage of the amplifier - 6N23P tube. 23:50 Comparison of the frequency responses of the amplifier on the 6N2P tube and on the 6N23P tube. 24:10 Setting up the circuit of a simple triode driver stage with a dual tube - 6N23P tube. 25:04 Comparison of the frequency response of this amplifier on the 6N2P tube and on the 6N23P tube. 25:12 Setting up the circuit of a simple triode driver stage on the 6N23P tube. 25:50 Stabilization of the operating point of the tube using an LED. 27:13 Frequency response of a simple triode driver stage on the 6N23P tube with LED stabilization. 27:35 Summary table of test results. 27:56 Summary frequency responses of all driver stages tested in the video. #Tube_Amplifier #Choosing_Radio_Tubes #Amplifier_Settings *** 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 it and subscribe to the channel so as not to miss the continuation! You can ask QUESTIONS in the comments to any video, on social networks and by email to the channel: [email protected] I will 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 TRAVEL, 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