Framus Cobra FX Loop

Discussion in 'Other Amps' started by Shae201, Sep 13, 2019.

  1. Shae201

    Shae201 Well-Known Member

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    In the manual for this amp, it says it cannot accept stompboxes in the FX Loop. Its a parallel loop and only works with rackmount units. I plugged in my EQ pedal anyway and it doesnt work much at all. Does anyone have a mod to turn it into series or do I need to use rackmount units?
     
  2. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor. free Mars!
    If you have the schematic you might be able to.
     
  3. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor. free Mars!
    It looks like if you take out the 100n cap, or the 100K resistor (either one), the loop will be series only. There will no longer be parallel.
    (schematic here)
    http://www.chasingtone.com/schematics/PPO25/Cobra_V1-2.pdf

    However there is an effects mix control which will no longer function if you change the loop to series.

    framuscobrapreamp.png
     
  4. Shae201

    Shae201 Well-Known Member

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    Wow, I appreciate it. I just don't understand why Framus made the call to make this amp only for Rackmount.:facepalm:
     
  5. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor. free Mars!
    Some builders are just into racks.

    There is a control that can be built with a 1 meg dual pot.
    It allows bypass, parallel adjustable mix and series all in the same control.
    I used that because I could get a lot more options out of the effects loop.
     

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