> thanks for the info. But why the randomness exists, it happens only in the > weekends or evenings. What I Figured out was the load in the apartment is > variable ie the power consumptions are more in the weekends b'cos of the > vacation. Just a guess: If the AC line voltage is significantly lower on weekends and evenings, perhaps something inside your audio system drops out of regulation (a voltage regulator stops doing a good job of producing a constant DC voltage), and the audio circuits get a "dirty" DC supply voltage which includes variations in the incoming AC voltage. Regards, Andy ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu