RE: How might such an oscillation be manifested, sonically?

Posted by Lew (A) on July 4, 2017 at 11:02:08

In Reply to: How might such an oscillation be manifested, sonically? posted by petercapo on July 3, 2017 at 19:03:49:

A touch of edginess to the sound, if the oscillation is very far above the audible range. Can get worse if lower in frequency, such that you wouldn't want to listen. In one extreme case having nothing to do with a bypass capacitor, one of my Beveridge amplifiers was set into oscillation (by the output from a CDP) and promptly blew a fuse.

But the only time I can recall with a bypass capacitor, it was not very audible at all. I added the resistor empirically, whereupon I did hear that a slight tinge of edginess was gone. I don't think one can generalize; it depends upon the circuit, the values, etc. For sure, bypass capacitors do not always cause oscillation.

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Follow Ups Full Thread

Topic - Which 0.1uF polypropylene bypass caps? - petercapo 18:18:19 07/02/17 (19)

RE: Which 0.1uF polypropylene bypass caps? - 13th Duke of Wymbourne 15:53:21 07/07/17 (3)

RE: Which 0.1uF polypropylene bypass caps? - petercapo 16:12:14 07/07/17 (2)

RE: Which 0.1uF polypropylene bypass caps? - 13th Duke of Wymbourne 18:11:07 07/07/17 (1)

RE: Which 0.1uF polypropylene bypass caps? - petercapo 20:51:01 07/07/17 (0)

If you control the design ... - slider 15:59:00 07/03/17 (2)

RE: If you control the design ... - petercapo 16:03:24 07/03/17 (1)

RE: If you control the design ... - slider 17:08:44 07/03/17 (0)

Oscillations - djk 14:23:44 07/03/17 (5)

This is true, and... - Lew 18:43:02 07/03/17 (4)

How might such an oscillation be manifested, sonically? - petercapo 19:03:49 07/03/17 (1)

RE: How might such an oscillation be manifested, sonically? - Lew 11:02:08 07/04/17 (0)

RE: This is true, and... - petercapo 18:59:03 07/03/17 (1)

Common - djk 15:02:19 07/05/17 (0)

Yes, it will make a difference... - Lew 19:16:43 07/02/17 (5)

RE: Yes, it will make a difference... - petercapo 20:57:04 07/02/17 (4)

REL MIT are fine for bypassing, either PPMFX or PPMFX-S,... - Lew 10:00:28 07/03/17 (0)

RE: Yes, it will make a difference... - bcowen 03:42:55 07/03/17 (2)

RE: Yes, it will make a difference... - petercapo 16:08:33 07/03/17 (0)

Jensen oil caps... - Lew 09:58:48 07/03/17 (0)

Follow Ups

RE: How might such an oscillation be manifested, sonically? - Lew 11:02:08 07/04/17 (0)

RE: How might such an oscillation be manifested, sonically?

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