Please help i need to know thwe values of r125 and 126 of mtx 2150x when i got the amp the resistor Was not there.
And please if you cant post some photos i Will apreciate if you can post some pics , the paths in the board to this resistors Was partially destroyed.
And please if you cant post some photos i Will apreciate if you can post some pics , the paths in the board to this resistors Was partially destroyed.
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Are they possibly the resistors for the ±15v voltage regulators?
If so, they will correspond to R30 and R31 in the attached diagram. The values may be different but are likely between the 470 ohm in that amp and the 680 ohm used in the 2300.
If so, they will correspond to R30 and R31 in the attached diagram. The values may be different but are likely between the 470 ohm in that amp and the 680 ohm used in the 2300.
Thank you so much Perry , 150 ohms and like 2 watts i think.
I Will get them and when i have them installed. I'll told you the results.
I Will get them and when i have them installed. I'll told you the results.
Hi I instaled 150 ohms 3 watt metal film resistor, the amp is working good.
But the resistors i think are working too hot i expected it to work hot, but i do not know if the heat in the resistors is normal. There is 30 celsius of diference between the 150 ohms resistor and the amp heatsink, i added heatsinks to this resistor, show in the images, the temp measured.
Nothing seems to be bad except for the high temperature in this New resistors
The audio in both channel are good i have +32 and -32 in rails
But the resistors i think are working too hot i expected it to work hot, but i do not know if the heat in the resistors is normal. There is 30 celsius of diference between the 150 ohms resistor and the amp heatsink, i added heatsinks to this resistor, show in the images, the temp measured.
Nothing seems to be bad except for the high temperature in this New resistors
The audio in both channel are good i have +32 and -32 in rails
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If the heatsink cuts through the coating on the resistor, it will short to the resistive element.
Measure the voltage across the resistors with no heatsink. Then calculate the power dissipation for the resistor using the formula P=E^2/R. Is the power dissipation less than the power rating for the resistor?
Measure the voltage across the resistors with no heatsink. Then calculate the power dissipation for the resistor using the formula P=E^2/R. Is the power dissipation less than the power rating for the resistor?
Yes i did it : power in watts is = 13.7 x 13.7/150=1.251266 watts
The resistors should be 3 watts
The resistors should be 3 watts
If it's dissipating only 1.25 watts, a 2 watt would work. If the location makes it run considerably hotter than it's rated for (consult derating curve), you would go to a 3w.
I apologize for my bad english, in the Last post i was tryng to say that the resistors i installed are 3 watts, i installed metal film instead carbon, could this make the difference?
If you're referring to the heating, no. The heating is determined by the surface area of the resistor.