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Parasitic oscillations in Audio and HF amplifiers; how pro ...
https://www.youtube.com/watch?v=pqnGYYGhWHU
Sorry: quite a long video but in my opinion instructive for all electronics hobbyists and professionals. Video about how to prevent and cure parasitic oscill...
Parasitic Oscillation | diyAudio
https://www.diyaudio.com/community/threads/parasitic-oscillation.351771/
Parasitic Oscillation. I have built an audio amp based on a Bob Cordell triple stage design. During testing the one channel worked well with a sine wave input and just an oscilloscope on the output. However when I connected a speaker to it there was a severe parasitic oscillation on the output. Also the heat sink got really hot very quickly.
Arcing parasitic oscillation amplifier stability – W8JI ...
https://new.w8ji.com/arcing-parasitic-oscillation-amplifier-stability/
Arcing parasitic oscillation amplifier stability ... RF systems are certainly no more immune to mismatch than audio amplifiers, they very often are much worse. RF circuits are generally single-ended, and tube-type amplifiers have moderately high-Q (efficient) energy storage tank
Parasitic Oscillation - diyAudio
https://www.diyaudio.com/forums/solid-state/351771-parasitic-oscillation.html
I have built an audio amp based on a Bob Cordell triple stage design. During testing the one channel worked well with a sine wave input and just an oscilloscope on the output. However when I connected a speaker to it there was a severe parasitic oscillation on the output. Also the heat sink got really hot very quickly.
Oscilloscope Testing of the Audio Amplifier.
http://www.r-type.org/articles/art-125.htm
A parasitic oscillation is shown in (b), this occurring at one point of the sine wave only. The parasitic oscillation may only occur at some input signal levels. (c) shows the clipping given by too low a screen-grid voltage in a voltage amplifier.
Why Circuits Oscillate Spuriously, Part 1 ... - AUDIO WORKSHOP
http://www.audioworkshop.org/downloads/AMPLIFIERS_OSCILLATION_BJT_CIRCUITS.pdf
far from oscillation the circuit design is. In Part 1 we examine causes and solutions for discrete BJT (bipolar junction transistor) amplifier circuit oscillation. The principles carry over to FETs fairly directly. We will look at two cases: in the first parasitic resonance is the cause; in the second the little-known effect of high-frequency
Parasitic oscillation in a tube guitar amp - Antique Radios
https://www.antiqueradios.com/forums/viewtopic.php?t=90967
That is normal. If you get a ripping or tearing sound in your audio while playing the guitar through the amp, that can be from parasitics. The parasitic itself is ultrasonic. Whenever I have had serious parasitic oscillation it was on solid-state hi-fi amps like and SAE or GAS amp.
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