Wednesday, 21 May 2014

Aefea Drive by Mark Hammer

Request for this new overdrive circuit from Mark Hammer, the "Almost Everything for Everybody ... Almost" Drive, which you can read about here:
http://www.diystompboxes.com/smfforum/index.php?topic=107216.0;topicseen




15 comments:

  1. Nice!

    Just a picky correction, Shape in the comments - Hardness in the layout ;)

    ReplyDelete
    Replies
    1. The pot is called both in the thread, but I'll stick with Hardness as per Mark

      Delete
    2. That's why I noticed it so quickly. When I saw you post this I was curious which labeling you decided to go with!

      Delete
  2. The three switch settings are incredibly bright, incredibly dark, and merely bright. It is confirmed but the hardness and tone pots are fairly ineffective. It has a nice character when cranked but I prefer a tad bit more juice.

    ReplyDelete
    Replies
    1. Cool thanks for verifying matey. I'll keep my eye on that thread in case any mods are suggested.

      Delete
  3. I built this one today. my hardness and tone controls are VERY effective. the gain and hardness controls are very interactive. IMO, two of the switch settings sound good. but to me, one is a bit too bright. mine has plenty of distortion, but I may try a few tweaks on it.

    ReplyDelete
  4. BTW, Mark Hammer did mention a few small update tweaks on it in the thread and changed the 36K tone resistor to a 30K and the 4n7 cap to a 3n9. I did those mods to mine and I also like it better with them.

    so this is how mine is now:

    http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/MarkHammer/002-Aefea_Drive-updated.png

    ReplyDelete
    Replies
    1. Did you use Linear or Log pots? Mark was contemplating another change.

      Delete
    2. I used the values posted in IvIark's layout.

      Delete
  5. I like this one too. I neglected to use an on/off/on (I'd add that to the build notes), so I am missing the stock setting. Of course I went back and looked at the thread and then it was obvious, so I'll swap that out. There is a lot of range in this one, and though it is bright, I built it for that purpose--I have a very dark Epi Valve Jr. that needs a bright pedal. Previously used a morning glory, but this design has more gain, and I like the split of less distorted lows and more distorted highs. The hardness knob does all kinds of stuff, it can go from very bright and sharp to liquid. I too used 30k/3n9.

    ReplyDelete
    Replies
    1. As an amendment to my post, the "off" position is not very useful for the switch. There's a decent sound in there if you max the hardness and the tone knob but overall it's pretty dark. So I guess you don't lose a whole lot building this with an on/on switch vs on/off/on.

      Delete
  6. First of all, thank you Mark for your endless effort. You constantly make my time with soldering iron and veros. Mine is fairly bright and I need to tame it with the tone pot. I have compared TL071CP with UA741CP. I don't hear any difference so I stick with the original.

    ReplyDelete
  7. greetings guys! playing around with this circuit a little. one thing that i don't like here - TOO MUCH highs. so i change 100pf to 470pf and now its perfect for me. 3n9 and 30K makes the difference in a good way. I use 3n3 instead, likes it better with my humbs.
    thanks for layout, Mark!

    ReplyDelete
    Replies
    1. Mine ended with 250pF silver mica (I had one) and 4n7 + 30k for tone. boxed and all good. ;-)

      Delete
  8. Wow! I don't even know how to get my head around this one. With the knobs and the switch it really is Almost Everything. Light, transparent OD to really heavy, chuggy, dark OD. Amazing stuff from such a small circuit. Great job Mark Hammer, and great job IvIark!

    ReplyDelete