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.

Monday, July 17, 2017

Lovepedal Dover Drive

Here's a pretty interesting overdrive from Lovepedal (Hermida). The signal goes through a dual PNP silicon transistor stage (don't worry, it's still a negative ground effect), then into a op amp gain stage with soft clipping in the feedback loop, with a Rat-style tone control, followed by an output buffer. Schematic can be found on FSB for reference.


5 comments:

  1. I wonder what happens if you throw germanium pnps instead of silicon ones. Will definitely check.
    ty for the layout

    ReplyDelete
    Replies
    1. I'd be interested in how this goes... need to do something with some spare 2n404a

      Delete

  2. I installed old Soviet germanium transistors (q1-mp42b h21 = 82, q2-mp41a h21 = 129). The sound is very cool. Warm and saturated sparkling )))

    ReplyDelete
    Replies
    1. Diodes are also old Soviet germanium d9b instead of 1N34a

      Delete
  3. I did this with the same components that indicates the circuit, just for the PNP, I switched to the BC558, because I bought a lot of them for the Band of Gypsys and I really liked it. The sound is very personal, powerful and loud, in my case like my BC558, have an HFE above 600, when I arrive with the volume close to the maximum it enters saturation, even regulating the trimpot to the minimum, I will have to limit the volume pot with a resistance.
    I'm getting addicted to overdrives, and this is among the best, to add to the collection. Thank you!

    ReplyDelete