I will show the assembly, setup and testing of the amplifier on field-effect transistors, known as Nelson Pass PLH amplifier. At the end of the video, of course, there is an audition of the amplifier. Link to the archive with the audition materials: https://yadi.sk/d/0aFm1WiQTxb3DA Nelson Pass claims that his circuit, compared to the original JLH, has four times better linearity at the same output power as the JLH. "John Linsley Hood Amplifier" - JLH: • Hi Fi Class A Amplifiers. JLH Amplifier ... "Hi-Fi Amplifier Auditions" • Hi-Fi Amplifier Auditions. Playlist: "Audio Amplifiers" • Audio Amplifiers. "Why Transistor Amplifiers Sound Bad" • Why Transistor Amplifiers Sound... You can help develop the Channel: Yandex Money: https://yoomoney.ru/to/410013004521132 Web Money: Z546631268395 00:00 Channel Unknown Physics - welcomes you! 00:15 The history of the PLH amplifier. 00:39 John Linsley Hood's amplifier - JLH. 01:20 Comparative test of JLH and Williamson amplifiers. 01:45 Modernized JLH circuits. 02:03 JLH served as a prototype for Nelson Pass in creating PLH. 02:30 The difference between bipolar and field-effect transistors. 02:50 Why Nelson Pass named his amplifier PLH. 03:34 Starting to assemble the PLH amplifier. 03:44 Parts for assembly. 04:32 Assembling the amplifier's final stage. 05:21 Preamplifier. 05:45 Finishing assembling the amplifier's output stage. 06:33 This is what the PLH amplifier looks like assembled in volumetric editing. 06:42 Everything is ready to test the preamplifier. 08:10 The entire structure is assembled. First switch-on. 08:29 Why doesn't the amplifier work? 09:33 Adjusted values ​​of the PLH circuit components. 09:43 The amplifier works. Preliminary adjustment. 10:38 The amplifier is ready for a test drive! 10:45 Running a sine test. I'm filming the amplifier's frequency response. 12:29 Amplifier transistor temperature. 12:45 Running a pulse test of the PLH amplifier. 13:45 Frequency response of the PLH amplifier. 13:53 Listening to the PLH amplifier. 14:48 Final results of the test drive of the Nelson Pass amplifier - PLH. #Nelson_Pass_Amplifier #Class_A_Amplifiers #PLH_Audio_Amplifier 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 with videos about birds and animals, about HANDMADE, 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) VKontakte: http://vk.com/afon2015 Odnoklassniki: https://goo.gl/VdSsCY Twitter: / afanasy83 Facebook: / afanasy83