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Circuit Diagram for Raven Labs PMB-1

Discussion in 'Effects [BG]' started by jmlee, Sep 24, 2017.

  1. jmlee

    jmlee Catgut? Not funny. Supporting Member

    Jun 16, 2005
    Halifax, Nova Scotia
    I'm looking for the circuit diagram for the now-discontinued Raven Labs Professional Master Blender PMB-1. This is the lovely, small mixer made by Steve Rabe. I'm having problems with the Master Volume pot which is a surface-mounted panel pot, labelled Di Ya 0424. It's resistant to the usual cleaning methods. As well, it's immediate neighbour (a 50k pot) seems mechanically loose on disassembly of the top level control PCB as shown. I'll likely replace the two of them if I can, but would appreciate having the circuit diagram to help to ensure everything is good. Anybody got such a thing? Thanks!

    Raven Labs PMB-1 Repair - 1.jpg Raven Labs PMB-1 Repair - 2.jpg Raven Labs PMB-1 Repair - 3.jpg
  2. MikeVB


    May 23, 2006
    Did you ever find a diagram or get the unit repaired?

    I'm considering buying a one-owner one that had the gain increased 6 dbs by the builder. I'm a little paranoid about whether it would sound the same and could be unmodded back to original specs.
  3. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

    Apr 11, 2021

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