Audio Asylum Thread Printer

Get a view of an entire thread on one page

Tech Square

Weird - ever heard of this?

71.204.54.207

bevo

I just got my DIY Pass Aleph5 amp going (toroid tranny) and have found that when my kitchen light switch is on (it is a dimmer), it causes the amp to buzz. The buzz does not come through the speakers - I think just the tranny is buzzing. The dimmer and the amp are located maybe 20 feet away and I have a power conditioner on my system AC (granted, not a high end one...). It took me a few hours to figure this out, but I have confirmed the direct relationship between the lights and the buzz. This is no ground loop issue relative to my components. Any thoughts/comments? Thanks

Follow Ups:

DC voltage on the AC line caused by the dimmer. - jea48 14:24:06 12/18/09 (0)
You might want to try a dimmer made by Lutron.
- Nelson Pass comment.... diyAudio Forums (Open in New Window)
RE: Weird - ever heard of this? - Tre' 17:19:42 12/14/09 (1)
Household light dimmers are duty cycle devices. They dim the lights by chopping the AC. This transmits large amounts of RF.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
- RE: Weird - ever heard of this? - GRechnitzer 16:54:36 01/15/10 (0)
  Most cheap light dimmers use a SCR wich is conducting/chopping on 1/2 the wave drawing a DC component off the AC line.

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.