Sunday, 13 July 2014

Vox V830 Distortion Booster

Yes. It is big. I've omitted the complex power supply, but left most of the noise reduction measures in tact. Transistor controlled LED circuitry is also gone. With dual gang gain pot and the board size, this will be a tricky but doable fit in 1590B.

Marketing spiel from ten years ago:
Attention: Guitarist who want the fattest distortion. 
Classic distortion, warm tone and high gain. The V830 delivers distortion that goes from 'just enough" to blistering. And its VOX, all analog circuit ensures that your guitar's sound is always warm and natural - no matter what level of distortion you dial in.

Versatile, to fit your style and the way you want to play.
Whether you're into low string riffs on an axe tuned down to D, or paint peeling high notes, the V830's unique design gives you great distortion without losing it's edge and becoming muddy. Even power chords never loose their harmony. The VOX Distortion Booster, for guitar with an attitude!

Three controls - that's all you need. 
The Distortion Booster's DRIVE, LEVEL and TONE knobs give you all the control you need to get the tone you want. It couldn't be any faster or easier to get the sound you need. And, VOX's true-bypass switching ensures that your direct sound is unaltered when you hit the footswitch and bypass the pedal's circuitry.


5 comments:

  1. Gonna try and resurrect comments on this one. I'm mostly curious about options for the dual gang 200kA pot. I have one of these on the bench for repair and the pots somehow just came apart. Sourcing a 200kA 9mm D-shaft dual taper pot is quite a challenge right now. Any suggestions? The shaft shape isn't essential, but it's nice to keep it consistent.

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  2. Hey all, any one able to specify the mod to bring back the low end for this pedal. Using this as a boost pedal is almost ideal for me except for the low end sappage.

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  3. This layout is still unverified. Did you build it successfully?

    Anyway, looking at the schematic, you can increase the low end change some value.
    You can change the 100nF, the only one in horizontal position, with a larger cap, like 220nF, to push more bass.
    The same thing with the 220nF under D4 diode, you can replace it with a 470nF.

    To avoid too much bass cut you can increase two resistors: the 15k, there's just one. And the 10k close to the 180nF cap. Both the resistors could be replaced by 100k.
    You can try just one or more of these mod.

    If you find this pedal too much bright you can add a 1nF cap in parallel to the 100k, the one in the lower part of the layout, between another 100k and a jumper. There's no enough room, but you can sold resistor and cap legs together.
    This will cut treble without change too much the nature of the sound.

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  4. Wow. thanks do much for that info. FYI I am modding the original, not built a replica

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