diyAudio (
-   Solid State (
-   -   buzzing power supply (

keyser 9th March 2005 09:42 AM

buzzing power supply
the power supply of my poweramp makes a buzzing sound when I turn it on (guess it's about 50 hz, the mains frequencie here in (most of) Europe). It lasts for only a few seconds, and after that it's only audible when I push my ear against the amp's case. This buzzing isn't really disturbing me, but I'm just curious what might cause it, and if it is harmful for the amp in any way.

Frank Berry 9th March 2005 09:51 AM

It's probably the transformer laminations that are buzzing.
Since it lasts for only a short period when power is applied, I'm guessing that the tranny is delivering lots of current while it's charging the electrolytic power supply capacitors. Probably nothing to worry about.

All times are GMT. The time now is 10:09 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2