After so many troubles with making and testing amplifiers with push pull buffers before the feedback point, I have decided to make a document which reflects what I have found.
An attempt has been made to make the document as concise as I can, just a few pages. Of course, the most important part is last.
The document concentrates, only, on simple weapons against oscillations, such as, a Zobel network and resistors. The new finding, which, I cannot find anywhere, is the possibility to eliminate or significantly decrease oscillations without any capacitors an Zobel networks, just, with simple resistors, which provide stable potentials and resistive paths for oscillations. The most important of them is a simple, load resistor in parallel to the speaker with a value of ten fold the value of the resistance of the speaker.
Of course, a combination of a few or all weapons against oscillations is possible.
Here is the document, called " Oscillations.doc " :
https://drive.google.com/drive/folders/1SXkcSbGwEz8DTH_6DdtDwolBuergbvyh
An attempt has been made to make the document as concise as I can, just a few pages. Of course, the most important part is last.
The document concentrates, only, on simple weapons against oscillations, such as, a Zobel network and resistors. The new finding, which, I cannot find anywhere, is the possibility to eliminate or significantly decrease oscillations without any capacitors an Zobel networks, just, with simple resistors, which provide stable potentials and resistive paths for oscillations. The most important of them is a simple, load resistor in parallel to the speaker with a value of ten fold the value of the resistance of the speaker.
Of course, a combination of a few or all weapons against oscillations is possible.
Here is the document, called " Oscillations.doc " :
https://drive.google.com/drive/folders/1SXkcSbGwEz8DTH_6DdtDwolBuergbvyh
