Re: [Harp-L] Power adapters are NOT created equal

["Dave Murray" <dlmurray@xxxxxxxxxxxxx>]

From: "Bob Maglinte" <bbqbob917@xxxxxxxxxxx>
> I used those and got the very same results too. Most Bos pedals use tend 
> to use adapters that are 200ma, and anything higher introduces unwanted 
> noise,

P=IE (Power = current x voltage) so a 9V adapter rated at 200ma can supply 
up to 1.8 Watts of power. If your pedal consumes 1.5W at 9V then it will 
draw 166 ma from a 200ma adapter and/or from a 50 amp adapter. I'm trying to 
understand what it is about an adapter that is "capable" of delivering more 
power that would cause it to be noisier when it is delivering much less than 
it is capable of delivering. You might have one that happens to be noisier, 
but I don't understand a "cause and effect relationship"?

Peace and music,
Dave