[Dixielandjazz] I flunked shop.

[Richard Broadie]

In this instance Bill was using a 9V 350mA power supply for a 9V 45mA 
keyboard application.  No chance for overload in this contingency.  I'm 
going to abandon this non-music thread as being reVOLTing.  Dick
----- Original Message ----- 
From: "Larry Walton Entertainment" <larrys.bands at charter.net>
To: <Bcf111 at aol.com>; "1-DIXIELAND JAZZ POST" 
<dixielandjazz at ml.islandnet.com>
Sent: Friday, November 04, 2005 12:32 PM
Subject: Re: [Dixielandjazz] I flunked shop.


> Yes - your device can draw that much but if it approaches that figure or 
> the max of the power supply  you will get voltage drops and heating so it 
> may deliver 400 ma but the voltage will drop significantly and the 
> transformer will start to do a smoke test.  It's best to get a larger 
> power supply.  That's assuming that the supply is unregulated (cheap) as 
> most of the power cubes are.  A regulated supply (expensive) will deliver 
> a constant voltage at some current rating or another.  If you exceed the 
> specs of the regulated supply, typically the circuit breaker will trip.
>
> Feel the power cube.  Un loaded they may feel slightly warm but should 
> never be uncomfortable to the touch.
>
> FYI - If the rating is in watts then at 110 volts 1000 watts equals 
> approximately one amp so you can figure out the total load of your amps 
> and devices by adding up the loads (in watts) and divide by 1000.  That's 
> not entirely accurate but it's close enough usually.  The formula is volts 
> x amps = watts  and volts (110) divided by watts (1000) = (1.1)amps
>
> Might keep you from blowing a fuse some day.
>
> Since we are into electrical.  Watch your mikes and water.  A minister day 
> before yesterday in St. Louis was about to baptize  someone and reached 
> for the  mike.  He was electrocuted in  front of  everyone at the service.
>
> I've had them bite me a time or two on wet ground.  Get an extension cord 
> with a good ground and a ground circuit interrupter built in.  I've been 
> looking for one but have been unsuccessful so far.  I guess I'll buy one 
> and build it into a box to plug in.
>
> Larry Walton
> St. Louis
>
> Bcf111 at aol.com wrote:
>> In a message dated 11/3/2005 8:55:45 P.M. Pacific Standard Time, 
>> dixielandjazz-request at ml.islandnet.com writes:
>>
>>
>> Isn't the 300 mA rating the max current output rating of the power 
>> supply? Of course.  Whaddya expect from an Econ  major?
>>  Ben Fowlkes, old fogy in  Sacramento
>>
>>
>>
>>
>>
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>>
>
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