#408: Distortion using Class A, B, AB and C amplifier types (by request) @w2aew

Uploaded January 2026 | Updated September 2026, 2 weeks ago

This video is by request of a viewer of my video on Class A, B, AB and C types of amplifiers. He asked what the distortion looked like using the FFT on the scope. The original video on the details of the various operating classes of amplifiers can be found here:
youtu.be/c6cmkm3UPUI
In this video, we look at the distortion on the FFT, as well as a quick Total Harmonic Distortion (THD) measurement. I also show a simple resonant load, and how it is used to reduce the distortion of the Class AB, B, and C amplifier states.
Notes from this video can be found here:
qsl.net/w2aew/youtube/ClassABCdistortion.pdf

#408: Distortion using Class A, B, AB and C amplifier types (by request)

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