Wood amp chassis?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers T' started by JDJ, Sep 6, 2010.

  1. JDJ

    JDJ Supporting Member

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    I'm thinking about building an amp, but I can't find an aftermarket chassis that fits it. I thought about building one out of wood and using brass plates here and there for grounding. What do you think? Anybody try it? I suppose that I would loose the shielding that a metal box provides.
     
  2. wizard333

    wizard333 Member

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    You'd lose the shielding for sure, and I'd be concerned that if something lifts/breaks, there wont be a ground reference. Some people also claim that the eddy currents caused by a metal chasis contribute to the sound of an amp.
     
  3. JDJ

    JDJ Supporting Member

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    Just thinking outside of the box... :D

    I could coat the inside with that conductive paint. And/or some copper foil. What do you think of that?
     
  4. SatelliteAmps

    SatelliteAmps Member

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    You can build it on a wood chassis if you have to. Some chassis don't shield very well anyways. Grounding will be a concern, but it can be dealt with. I wouldn't bother with copper foil or shielded paint. If it was me, I would use a large brass plate behind the controls to act as a grounding bus for them. For the tube sockets & transformers), I would probably use a piece of plate metal (aluminum or steel) and cut it to size, then punch holes and mount it on top of the wood chassis. I would then use a large wire to connect the two together so they are one common grounded plane. Use wood for the rest.
     
  5. JDJ

    JDJ Supporting Member

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    Cool... thanks for the input. :)
     
  6. Dana-L

    Dana-L Member

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    From an old radio handbook:

    [​IMG]
     
  7. JDJ

    JDJ Supporting Member

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    I like that wooden chassis!

    BTW, anybody know a good source for Allen-Bradley NOS resistors... I need about 29 of them. Thanks! :)
     
  8. VanR

    VanR Senior Member

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  9. Trout

    Trout Member

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    Look up old 1920's antique radios like Atwater Kent. The used wood chassis, and actually had leads carved/routed into the bottom side to prevent them from flopping around.

    Of course they had really cool bakelite tube socket and coil assemblies.

    [​IMG]

    [​IMG]

    [​IMG]
     
  10. TweeDLX

    TweeDLX Member

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    Way cool pics Trout!!! Thanks for sharing them.

    Mike
     
  11. aleclee

    aleclee I'll take the "over" Staff Member

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    Use a cake pan.
     
  12. Trout

    Trout Member

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    +1

    Ikea has some REALLY cool looking cake pans, seamless aluminum with nice tight radius.
    I have seen a lot of guys do that with excellent results.
     
  13. jbefumo

    jbefumo Member

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    I've been considering having a chassis bent out of 12-gauge sheet brass -- mainly for aesthetic considerations. Any contraindications?
     
  14. VacuumVoodoo

    VacuumVoodoo Member

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    Cooking pots work just as well.

    [​IMG]
     
  15. '58Bassman

    '58Bassman Member

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    Now THAT'S what's known as a 'table-top radio'!
     
  16. Keyser Soze

    Keyser Soze Member

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    That second one would look awesome atop a full stack of 4x12"s

    Aleksanders, not so much...;)
     
  17. guitarcapo

    guitarcapo Member

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    heat is your enemy
     
  18. teemuk

    teemuk Member

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    Or "breadboard".
     
  19. phsyconoodler

    phsyconoodler Member

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    Or get an aluminum chassis made to your specs.There are lots of places that make chassis.
    www.turretboards.com and many others.
     
  20. Baxtercat

    Baxtercat Member

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    Cake pans, tool boxes...
    [​IMG]
     

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