PT-80 Delay

This is a pedal designed by Scott Swartz to emulate the sound of the old analog delay pedals.

Download Build Diagram
Download Etch Template
Download Schematic


9 Responses to “PT-80 Delay”

  1. John Bgron Says:

    Hi, has this layout been verified? Its very neat, much nicer than the one at ggg.

  2. John Bgron Says:

    This didn’t work for me. I’m pretty sure its because the layout is different to the PCB around the top left corner. I then built the PT-80 from ggg and it worked just fine.

  3. Angel Says:

    would like to warn the community DIYers, that between the pcb and layout of this project there is a difference in the slopes, where there is a 10k resistor in the top center and below the .033 capacitor connected to pin 1 of IC sa571, for fabor if anyone else saw the differences among them, comment here, for my part I am trying to correct to see if proper operation.
    Angel – lw3eiv

  4. Angel Says:

    Hello and built the delay, but does not work, I saw that is a difference between the circuit and the pcb layout, if someone builds and runs I ask for help.
    Thanks Angel – LW3EIV.

  5. Adrian Says:

    Looks better than ggg ones

    It is verified??

    Thanks and sorry for my bad english

  6. Tony Says:

    I built it, but the sound is low.
    I invert 0.33 capacitor with 10k resistor.

    Sorry for my english

  7. Alexander SK Says:

    Всем привет. Я сейчас собираю эту примочку. Кто-то уже протестировал ее? И что-там за проблемы я так и не понял с резистором и конденсатором?

  8. Alexander SK Says:

    поменял я резистор и конденсатор. Когда включаю примочку нет самого эффекта, странно а я так надеялся.. не пойму где я допустил ошибку.. когда включаю звук просто чуть драйвовее становится если сильнее бить по струнам но дилэя нет ((

  9. obdoz Says:

    the card is working very not bad, try to change resistors r17 r18 r19..

    with greetings from Russia

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