This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Friday, November 21, 2014

Crap-Fi Delay

Here's a fairly simple PT2399 delay from Allesz over on FSB. Here's what he had to say about it:

It is a simple circuit and it works good but: the mix and repeats pot are a little interactive in quite a strange way (anyway they work different from a standard echo: to turn off the delay you don'use the mix pot, but you turn to zero the feedback pot) and the on off is a little bit noisy (the clip is recorded at low volume and you will hear kids (always noisy) and clicks so, mostly, the clicks are from the mechanical sound of the switch, but a little noise makes it to the amp too) in order to minimize the clicks the input is grounded on bypass.

The major differences between my schem and the others pt2399 projects I know are that I didn't use the opamp between pins 14 and 13 and I didn't put a cap between pin 2 and three (repeats sounded cleaner to me this way).

I put a small switch to select between long and short delay; the long delays are quite dirty.






13 comments:

  1. no sirve algo esta mal podrian poner el diagrama.

    ReplyDelete
    Replies
    1. Google Translate leads me to believe the effect isn't working for you. I reviewed the layout and I'm not sure what schematic I based it off of. It may have been a later revision. At any rate, I've redrawn it from Allesz's original schematic. The layout has been updated.

      Delete
  2. i made one layout fro here see my mine https://www.youtube.com/watch?v=BCpSsUOJKjc

    ReplyDelete
  3. simple and good delay. i like it brothers. sorry for my bad english. cheers \m/ from indonesia

    ReplyDelete
  4. sw2 to time 1 and 2?? 1 and 2 are linked?? sorry for my inglish and thank you very much for de efect work!!!

    ReplyDelete
    Replies
    1. Yes, Time lugs 1 and 2 are jumpered.

      Delete
  5. I made this one and things are fine but an over loud popping sound... what to do bro?

    ReplyDelete
  6. Replies
    1. I think I used this one.

      http://freestompboxes.org/viewtopic.php?f=88&t=15402&p=173263&hilit=crap+fi+delay#p174016

      Delete
  7. This is a very good delay; but there's any way to remove the pop sound?

    ReplyDelete
    Replies
    1. Try increasing the values of the pulldown resistor as input and output.

      Delete
  8. This comment has been removed by the author.

    ReplyDelete