Hi Jean Pierre
I got it wrong. its not the thermistor that's blown, its the resistor at PCT2.
Problem is, I can't find any BOM for the original version of the MP573 on your site.
Can you send me the documentation for this preamp and also confirm what resistor this is.
It looks like some kind of fuse resistor and i'm not sure I even know how I did this.
Must have hot-plugged it a couple of years back.
Matt
