Monday, 30 August 2021

Guyatone WR3 Wah Rocker

 A fairly simple to build auto wah that is supposed to sound really good.

Schematic is avaiable HERE.




11 comments:

  1. Fired first time. Sounds absolutely great! Love it! Box it! Thanks a lot!
    BC 184C and BAV21. No mojo, no fun!

    By the way, my first pedal ever was (is, I still have it) a Guyatone. A historic one. And a shame his layout doesn't exist here. Shame on you, Anders!... :O)

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    Replies
    1. Thanks you!

      Curious which Guyatone pedal you are missing???:-p

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    2. I have a sweet spot for Guyatone pedals, too (as well as Rolling and Aria) :)
      As far as I know, Rolling pedals were OEM (also sold under various other brands), but Guyatone and Aria used their own designs.
      The PS-0xx serie is nice, as well as the previous serie, the PS-00x

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  2. By the way, there are a new pedal company that is building very interesting takes on old pedals - TWA, Totaly Wicked Audio. One of them is this Rocket Wah; the other is the Systech Harmonic Energizer. Both sound stellar!

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  3. «Curious which Guyatone pedal you are missing???»

    Guyatone Zoom Box Distortion PS-102 (with the UA741, 2 germanium diodes and 1 silicon).
    I know it's the same as the Vox 1901 Distortion (and almost the same as the MXR Distortion +), but, to me, it's the best distortion ever. No love like the first!...
    The guys in Tagboard Effects made a layout of it. I compared it with my own pedal and it's way far from the real thing. Can't explain exacly why, as it is such a simple circuit... :O/ True they miss a diode.
    Bear in mind, that I'm not requesting it. No need for a copy: I have the graal!... :O) But just for historic reasons, and easy as it is, You shouldn't rest on the barbaric age.

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  4. Anyone know of a good substitute for the DS448 diode? I dont seem to have that in my inventory.

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  5. a short but cool demo:
    https://www.youtube.com/watch?v=AR7pKxvQfIo

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  6. Hey guys! I[ finished building this project but only getting clean signal. I have been grabing this for several hours to detect any possible faults but nothing seems wrong. Since I have any background knowledge about how the pedals work, so I would like to ask some help from experts!

    The problems of this pedal are:
    1. If I turn on the pedal and move the switch in it, one side give the little bit boosted clean sound and opposite side gives very small guitar sound with buzzing noises. Pots don't seems like it working properly
    2. If I touch the board beneath the ic 2 or switch 2 section it kinda gives slight wah sound with huge noises(maybe related to ground noise). ic works properly since I checked with other circuits.
    3.I have used 390k instead of 470k since I am currently out of it.

    Would it be any problematic part or any section i need to check that can shown from my descriptions? I have built several of vero pedals works perfectly but it is the first time for me to experience this huge problem so kinda sad lol. If there is any tips you guys like to leave plz let me know!
    Thanks a lot for reading this.

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  7. What are the voltages on the pins of the ICs

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