🚀 go-pugleaf

From article <1992Dec26.063254.23524@murdoch.acc.Virginia.EDU>, by alexander@kronos.pharm.Virginia.EDU (Robert Alexander):
> 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).

Yikes!  This will result in about 170VDC!  Not only is it a
bit more dangerous to deal with, but standard bulbs run this
way last a very short time.  But they'll be pretty efficient!
You must have a pretty large rheostat handy, or else you are
playing with fire.  There are far more efficient ways of
dealing with voltage conversion these days.  Why has nobody
mentioned switching power supplies, besides cost?
-- 
Mark Walsh (walsh@optilink) -- UUCP: uunet!optilink!walsh
AOL: BigCookie -- Amateur Radio: KM6XU@WX3K -- USCF: L10861
"What, me worry?" - William M. Gaines, 1922-1992