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- Newsgroups: sci.electronics
- Path: sparky!uunet!munnari.oz.au!spool.mu.edu!torn!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: Re: Substituting fsuppli
- Message-ID: <C01GE6.K0F@zoo.toronto.edu>
- Date: Tue, 29 Dec 1992 20:46:53 GMT
- References: <BzzBDz.G00@acsu.buffalo.edu>
- Organization: U of Toronto Zoology
- Lines: 18
-
- In article <BzzBDz.G00@acsu.buffalo.edu> v064mb9k@ubvmsb.cc.buffalo.edu (NEIL GANDLER) writes:
- >Are DC adapters pretty regulated on their own. If I dont exceed the
- >amperage can I be sure that the output voltage will notmuch below
- >12 volts ...
-
- In my experience, no. The output voltage varies quite substantially with
- the current drain. My guess is that they don't have any regulation in
- them, just transformer plus diodes plus (I hope) a filter capacitor.
- This is plenty good enough for their original application -- battery
- elimination -- since equipment powered by (non-rechargeable) batteries
- has to tolerate wide voltage change as batteries age.
-
- I'd expect that some adapters are better than others, so the definitive
- answer is to test your adapter under load: buy a handful of power
- resistors and try it out. But don't get your hopes too high.
- --
- "God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-