Forums
https://www.decware.com/cgi-bin/yabb22/YaBB.pl AUDIO FORUMS >> General Discussion and Support >> Decware Grounding Scheme https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1382815891 Message started by hifitubes on 10/26/13 at 20:31:31 |
Title: Decware Grounding Scheme Post by hifitubes on 10/26/13 at 20:31:31 I've been troubleshooting why my dishwasher creates a buzz that comes up either AC + or the Ground into my Rachel amp. It appears that all (4) speaker terminals and the - RCA short to the IEC ground, but not chassis. I have noticed if I tie the transformer to the chassis of my DAC, hum drops a bit. I probably also have DC on the line as both units chassis/tranny buzz and vibrate. Is this normal? Or part of the Decware design e.g. floating transformer ground. i've read this from a well-respected designer; not saying this is good or bad just curious as to design. Quote:
|
Title: Re: Decware Grounding Scheme Post by hifitubes on 10/27/13 at 17:44:07 So today I put a cheater plug on the Rachel, hooked it up to an AC regenerator, and turned on the dishwasher. A loud buzz comes out of the speakers when dishwasher is running. I measured 20V AC across chassis of DAC to + Rachel binding post, 30V AC across AC Regenerator chassis to + Rachel binding post, and 3v from chassis of Rachel to + Rachel binding post. I wonder if neutral and ground are tied at dishwasher? |
Title: Re: Decware Grounding Scheme Post by hifitubes on 10/27/13 at 18:35:08 Should the + and - speaker terminals short? Input jacks - shorts to both + and - binding posts. I guess it must be by design, floating bridge... |
Title: Re: Decware Grounding Scheme Post by Mark on 10/27/13 at 21:57:18 Question: Are you powering up your audio system from a sub-panel?... Many sub-panels are wired wrong... They should have the neutral floating, and not bonded to ground... Bonding the neutral to ground should only happen at the main dist. panel... Added: Note: If you do have a sub-panel, when you look at the neutral buss-bar, only white wires should go to it... And the bonding screw should be taken out... All the bare copper grounding wires should go to a separate accessory bar that manufacturers sell for this purpose... (m.) |
Title: Re: Decware Grounding Scheme Post by hifitubes on 10/28/13 at 05:45:03 Firstly, Steve said my amp checks out. I meant continuity, and since I'm a layman, a short was the wrong choice of word. Mark, thanks for post. I will check today when electrician gets here. Something is not right. My buddy has a studio on camp and says he has 3-phase, and a sub-panel. I don't think I do. |
Forums » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |