ADA Preamps > MP-1 Classic

Problem with Tube Voicings on Classic

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BradS71:

--- Quote from: MarshallJMP on May 13, 2017, 08:24:14 AM ---Check this resistor with your multimeter, (do not turn the classic on!!) it should be 180k ohm.

--- End quote ---

I'm getting 34.5 MΩ! That's 34million Ohms, right? I checked it multiple times to make sure I wasn't crazy. I'm guessing you've found the problem!  :D

MarshallJMP:
Yeah these go up in value so replace it and it should solve your problem. If not we'll look further !!

rnolan:
Wow, I hadn't seen a shot of the inside of a classic before, you can see the advance in PCB compared to MP-1/2

Harley Hexxe:
Yeah Richard,

     It looks more like the PCB of the MP-2 than the MP-1. I remember posting that a long time ago when Jurrie was still with us.

MarshallJMP:
It doesn't always looks like that, I attached a pic of my classic pcb.

Downside of the classic pcb's is that they are a b**ch to work on.

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