home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.electronics
- Path: sparky!uunet!gatech!concert!uvaarpa!murdoch!kronos!alexander
- From: alexander@kronos.pharm.Virginia.EDU (Robert Alexander)
- Subject: Re: RFI free dimmer switches...
- Message-ID: <1992Dec26.063254.23524@murdoch.acc.Virginia.EDU>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- References: <1992Dec25.235206.6146@ee.ubc.ca> <72415@cup.portal.com>
- Distribution: na
- Date: Sat, 26 Dec 1992 06:32:54 GMT
- Lines: 19
-
- In article <72415@cup.portal.com> dbell@cup.portal.com (David J Bell) writes:
- >
- >>But a light dimmer I have installed makes the lightbulb RING alot, and
- >>it's very annoying. The ringing gets worse when you dim the light. I'm
- >>wondering if a "RFI free" dimmer will reduce this ringing. Anyone know?
- >
- You might look more in the direction of using a full wave
- rectifier and a filter cap. If you take the AC out of it
- completely...It CAN'T ring.
-
- You'll wind up with about 140 volts DC and that through a
- rheostat should work on a standard light bulb ok. (I think).
-
- My $.02
-
- --
- rfa@turing.ORG ( KD4QBD ) / BROADCAST ENGINEER
- (804) 296-7697 Hm / WCHV WWWVV
- (804) 977-5566 Wk / Oldies AlbumRock
-