|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Help .ac line nose. posted by jking67 on January 5, 2008 at 19:59:01:
The furnace blower motor has a starting circuit and a centrifugal switch that opens once the motor gets to a certain speed. There will be a pulse on the AC line when that happens, as well as a magnetic pulse. If the blower is, say, directly below the preamp, you might be picking up the magnetic pulse directly and not through the AC line. If this is the case, then you might need some magnetic shielding around the blower motor compartment on the furnace. You might consider replacing the furnace with a high-efficiency model that uses a multi-speed blower, but then you will have RF noise generated by the computer that runs the furnace.
An isolation transformer is not likely to help. A snubber circuit on the motor might help, but that is not a simple installation, and I don't know of external noise suppressors made for that purpose.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- How close is your preamp to the furnace motor? - Al Sekela 20:48:26 01/06/08 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
