>From: "R. A. Cantrell" <[EMAIL PROTECTED]> >Date: Tue, 11 Mar 2003 07:26:07 -0600 > >on 3/10/03 11:14 PM, L.G.Baker at [EMAIL PROTECTED] wrote: > > > Mine says 120v AC 60 Hz 16W input; 9V AC 1000mA output. Hope this helps. >I've got a 9VAC that I'm pretty sure came to me with a USR modem, but the >ma is 650. Question: how critical is the ma? will one that is too high or >low fry the apparatus?
In my experience it is more critical with to low ma as the aparatus can�t operate with to low current but having sligtly to high ma is not detrimental. If high enough I think it can fry the aparatus. I do not know how much more this aparatus can tolerate but a few % more will probably be ok.
Not quite. The apparatus will only draw as much current (mA) as it needs from a higher-current PS. If the PS is rated too low current wise, it could burn itself out, and/or damage the equipment. An *unregulated* PS will try and put out more voltage to compensate for what it lacks in current, and that is what causes the damage.
Too low or high a voltage can cause problems too. Too low, and it tries to draw more current (PS burns out), or just doesn't power up. Too high and it can fritz your equipment.
Best bet for the PS is always same voltage, regulated, and the same current rating _or more_ as what is printed on the device. I try to only use voltage-regulated power supplies.
Clae.
-- "As a net is made up by a series of knots, so everything in this world is connected by a series of knots. If anyone thinks that the mesh of a net is an independant, isolated thing, he is mistaken. It is called a net because it is made up of a series of connected meshes, and each mesh has its place and responsibilities in relation to other meshes." - The Teaching Of Buddha, (c) Bukkyo Dendo Kyokai (Buddhist Promoting Foundation), Tokyo 1966,
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