Memphis 16-mc3004 pops fuses - diyAudio
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Old 9th January 2012, 06:48 PM   #1
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Default Memphis 16-mc3004 pops fuses

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?

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The resistors still in the amp.
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Old 9th January 2012, 08:00 PM   #2
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This might help some
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File Type: gif resistor-color-code-all.gif (37.7 KB, 47 views)
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Old 9th January 2012, 08:12 PM   #3
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Nice, the ones I found didn't have silver as a choice on the 3rd stripe, lol.
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Old 9th January 2012, 08:30 PM   #4
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So my resistor is .05 ohm with +/- 5% tolerance? If so, digikey dont have it..bah
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Old 10th January 2012, 12:03 AM   #5
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0.5 ohm is more likely the correct value.
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Old 10th January 2012, 12:24 AM   #6
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Before I start getting parts ordered, would this one work? Or do I need higher wattage ones.

LVR01R0500FE12 Vishay/Dale Current Sense Resistors
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Old 10th January 2012, 01:02 AM   #7
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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...
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Old 10th January 2012, 01:14 AM   #8
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71-LVR2-0.05

I think 0.05 ohms is correct. THIS is an example of a 0.02 ohm.
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Old 10th January 2012, 01:20 AM   #9
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How do you tell the watt rating of a resistor?
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Old 10th January 2012, 01:27 AM   #10
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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.
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