Quick question, Resistor watt ratings
Mar 1, 2006 at 9:00 AM Thread Starter Post #1 of 8

tilt

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dacah1.jpg

What watt ratting is suggested for this application?

Mouse is hovering over the order button at PC

Also, those are 100k ohms each right?
http://www6.head-fi.org/forums/showp...6&postcount=17
He mentioned he rasied the output resistance to 200k, so 100k for each film cap?
 
Mar 1, 2006 at 9:08 AM Post #2 of 8

dhp

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the resistors to the left of the RCAs look like 1/8W vishay/dales and the 2 resistors on the right connecting the white caps look like 1/4W vishay/dales. KEep in mind that for all intents and purposes, 1/8W vds are 1/4W and 1/4W are 1/2W
 
Mar 1, 2006 at 9:20 AM Post #3 of 8

tilt

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Mar 1, 2006 at 9:22 AM Post #4 of 8

tilt

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also, would to be so bad to play it safe and just get 1/2 watt's? or is that detremental to the sound?
 
Mar 1, 2006 at 9:54 AM Post #6 of 8

tilt

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cool, thanx!
 
Mar 1, 2006 at 4:20 PM Post #8 of 8

Daroid

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I suppose that the input signal after the coupling capacitors is connected to the op-amp inputs, right ?

Then about zero current will be drawn from the inputs, so the calculations would be simple.

P=U^2/R

For input signal level it could be anything, since manufacturers use different outputs, and if the output is amplified.... But 2.5V is a good measure.

The P=2.5^2/100 = 0,0625 mW

1/8W is 125mW

So it would work well enough.
If the don't go to the op-amps, do a KCL for the circuit until you find the current that pass through the input section....
 

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