Tuesday, 27 September 2016

Electro Harmonix Octave Multiplexer

Here is a layout for a classic pedal.
I've drawn 2 versions: Vintage and Modern.
There are 2 layouts for the Vintage: with and without output boost.
I've added a boost to the Modern layout to avoid volume loss.
You can find the original FSB thread here.

Electro Harmonix Black Finger Compressor/Sustainer

Here is a layout for the older version of EH Black Finger.
You can find the original FSB thread here.
I've used Pedalgrinder slightly modified schematic on page 3.
Some suggested high gain, some low gain transistors.
Should test them both.

... and the LM13700's version:

Electro Harmonix Full Double Tracking

Here is a verified layout for a quite unknown slapback-echo EH pedal.
You can find the original FSB thread here.
I've added an output boost to cover volume loss.
I've found only one video around but didn't sound great.

Saturday, 24 September 2016

Paul Trombetta Designs Bone Machine

Here is a great fuzz pedal similar to the Rockett WTF (which Paul also designed).
A couple of capacitors are unknown.
You need to test different values (shouldn't be too difficult to find the correct ones).
Schematic and original FSB thread are available here.
Paul has also added a Si/Ge transistors switch to his V.2
I've added a second layout with the new extra switch but it's all guesswork.

Visual Sound Jekyll & Hyde

This is a verified layout of the Grey Version with an added Bass Boost switch borrowed from V.2
It's basically 2 modified well known circuits in series (TubeScreamer & Shredmaster).
There are 2 versions:
- a true bypass version were you wire two separate 3PDT footswitches in series.
- the original Visual Sound version which uses a Multiplexer Switching daughterboard.
The result should be a much smaller pedal compared to the original.
You can check Strassercaster verified version on the forum section.
Schematic and original thread from FSB are available here.