Cross over distortion in audio amplifiers (demo and oscilloscope view) part 1 скачать в хорошем качестве

Cross over distortion in audio amplifiers (demo and oscilloscope view) part 1

Next video about crossover distortion is on:    • Cross over distortion in audio amplifiers ...   The video shows the typical oscilloscope view from crossover distortion, looks like small "bursts" on the sine wave. Very important to tell: when you connect a few diodes between the two base electrodes from the end-NPN (2N3055) and the end-PNP (2955) the quiescent current can raise to an extreme value, heating up your end transistors excessively even so strong that they burn out. That is the reason why this amplifier must be fused with a 1 AMP fuse. The quiescent current from such and end-stage is extremely (!) critical and very important for the (long time) stability from the amp, this means that the diodes have to forward the end-transistors in the 0,01 Volt range. When you are lucky sometimes 2 or more diodes give the exact right forward voltage, but often this is not the case. If so, you need a regulated zener (see the next video, link above). Critical: the transistors may not burn out but they also have to amplify the wave properly. Much more info about audio amplifiers is in my book: "Schematics 2, audio amplifiers and loudspeaker boxes". You can buy that book on the LULU website, search for author Ko Tilman. Much more info about all the videos on my channel: click on    • Radiofun232 on YouTube, find working & tes...   also regarding audio amplifiers etc. final video link in this series    • 5-8 watt audio amplifier with unique tone ...   This video is part of a series: first video (test your transistors):    • You want to make an audio amplifier? Test ...   second video: decoupling unit:   • Decoupling unit for audio amplifiers, how ...   third video: croosover distortion part 1:    • Cross over distortion in audio amplifiers ...   4th video: crossover distortion part 2:   • Cross over distortion in audio amplifiers ...   SCHEMATIC & TEST 5-8W AUDIO AMP:    • 5-8 watt audio amplifier with unique tone ...   endurance test from this 5-8 Watt audio amp:   • Endurance test from the 5- 8 watt audio am...