Plexi70 - Madbean Grapevine (sort of)

[lrgaraujo]

Hi folks,
This is a madbean grapevine with a couple of changes. Build required a little tweaking:
I didn't have any 2n5457 so I used Toshiba's 2sk118, it worked but became too gainy, even fuzzy, at relatively low gain settings. So I changed Q1 for a MPF102 and it became much better. I even tried to put a mpf102 in place of Q2 but that was a no-go. Last change I made was to use a gain pot of 200k.
Pedal sounds amazing, I can't compare it to a DLS cause I couldn't find a video showing what a DLS can do to a  clean SS amp such as mine.


I'm not at all proud of this build when it comes to looks: knobs covered the labeling and the guts are a mess, but I thought it was worth sharing due to the experience with different fets.
PS: not sure if you can note the twisted legs of the fets, but the sk118 have a weird pinout (SGD I think)

Lourenço

[TGP39]

Hi Lourenço..... The most important aspect of any build is how does it sound? Since your build sounds great......mission accomplished. Personally, I really appreciate it when other builders share their experience regarding other transistor options in a build. I am going to try this combination. Great build.

Steve.

[lincolnic]

Where did those knobs come from? The build looks great and they really complement the finish.

[nzCdog]

great job dude... been meaning to build me one of these

[lrgaraujo]

Thanks guys!

Where did those knobs come from? The build looks great and they really complement the finish.

The knobs are cheap ones I found in my component store here in Brasil, I can't even give you a proper reference, sorry...

[lincolnic]

No worries, I had a feeling they might not be easy to find. They just look cool!