Memphis 16-mc3004 pops fuses

[StillLearning]

Ok, so pops fuses every 10 secs of being hooked up. Yall have stated the output transistors are shorted. Last time I hooked it up I seen the resistors smoking when I had the cover off, so I am replacing them too. Only thing is, The color code looks black, green, silver, gold. Ive been all over the net looking at color charts and there is no silver stripe other than the last one that would be 10% tolerance. Maybe what i think is silver is either white or grey?



The resistors still in the amp.

[1moreamp]

This might help some

[StillLearning]

Nice, the ones I found didn't have silver as a choice on the 3rd stripe, lol.

[StillLearning]

So my resistor is .05 ohm with +/- 5% tolerance? If so, digikey dont have it..bah

[1moreamp]

0.5 ohm is more likely the correct value.

[StillLearning]

Before I start getting parts ordered, would this one work? Or do I need higher wattage ones.

LVR01R0500FE12 Vishay/Dale Current Sense Resistors

[1moreamp]

The one you have in hand appears to be a 2 watt version, 3 watt would work also. The spec of the one listed is 1 watt...

[Perry Babin]

71-LVR2-0.05

I think 0.05 ohms is correct. THIS is an example of a 0.02 ohm.

[StillLearning]

How do you tell the watt rating of a resistor?

[Perry Babin]

It's generally determined by the physical size but that's not 100% reliable because some resistors are made of high-temp materials and can dissipate more power than other resistors their size. I don't think that's the case here. These appear to be run-of-the-mill wirewound resistors. Using replacements the same size should be sufficient.

I doubt that your resistors are defective. Wirewound resistors can take a lot of abuse.