Mesa Boogie Dual Rectifier CRACKLE

[GoldtoneWorkshop]

Sometimes boogie runs traces under components and they arc to the trace. If that was the case maybe the 2W component offered better insulation or distance from the trace. Or it could have just been a noisy resistor, which often will measure perfectly fine on ohm meter.

Gotcha, the new resistor is off a few mil off of the board so maybe that is what did the trick; I'll look out for that in the future!

Is there any way to test for noisy resistors like that? Thanks

[g1]

Is there any way to test for noisy resistors like that?

Sometimes freeze spray or heat on the resistor will make the noise come or go, other than that, not really any tests that I know of.

[Enzo]

pulled and tested the resistor out of circuit ages ago and it tested spot on, 220k

Value of a resistor rarely causes noise. Old Fender amps were made with 20% tolerance resistors even. But there is no test for a noisy resistor out of circuit.. Well not in what we would consider an amp repair shop. Maybe a lab.

agree with g1, we have heat and cold in the shop for just such things.

[GoldtoneWorkshop]

Value of a resistor rarely causes noise. Old Fender amps were made with 20% tolerance resistors even. But there is no test for a noisy resistor out of circuit.. Well not in what we would consider an amp repair shop. Maybe a lab.

agree with g1, we have heat and cold in the shop for just such things.

So you're saying I have an excuse to buy a bunch of lab gear? Noted, lol

Thanks again y'all

[Enzo]

Only if you decide the only way to find noisy parts is by removing them to test.