Boss Chorus CH 1 and Behringer UC200 Mod

Mods for more thicker effect options:

• Add a toggle switch (on-off-on) to select the C18 values, this will change the delay time of the out of tune signal, before it is added to the guitar signal. The middle position will be off and only a 5pf (or 4,7pF) value is seeing by the circuit, no delay at all, the others positions will select two 0 to 100pF trimmers that can be adjusted as you wish, for a pleasant delay color. Adding more delay time, more thicker will be the chorus effect.
• Optionally, reduce the value of C30 (or remove it) to upper the trebles, only in case of a dead tone problem.

*     In place of one trimmer, could be used the original 47pF capacitor.

**   Behringer have originaly  a 5pF in parallel to a 47pF (C18) capacitor.
*** The C18 mod is very famous in the internet foruns.

See the picture:

*Use Boss schematic above to mod this Behringer stomp box.

Boss Tremolo TR 1 and Behringer UT100 Mod

Mods for more tone options and balance the on and off stomp's volume:

• Replace the R9 resistor from 10K to 18K (or more), to balance the on and off stomp volume. I've choosen 18K.
• Add a on-off-on toggle switch to select the C4 values (or no C4), this will make a subdued, but perceptive, diference in the effect tone. The middle position will select none capacitor, the Boss TR1 came originally with 0,1uF cap and the Behringer came with a 0,68uF eletrolitic cap. You can select 0,1uF, 0,68uF and none capacitor, or try out others values.

See the picture:

*Use Boss schematic above to mod this Behringer stomp box.

Boss HyperFuzz FZ-2 or Behringer Super Fuzz SF300 Mod

Mods for a more pleasing distortion without the "octave" effect and adding the volume control in the boost mode:

• Remove Q13 and its circuit to get the octave effect out, as the picture shows, its possible to remove the 1k resistor initially to test this mod.
• Replace the 10K in Q14 base for a 1K resistor, to increase the stomp volume.
• Jump the part of the mode switch and cut one lead, to add the volume control to the boost mode (see in the picture below).

See the picture:

*Use Boss schematic above to mod this Behringer stomp box.

Boss Noise Supressor NS-2 or Behringer NR300 mods

Mods for a more transparent bypass and effect, reducing the tone difference when the pedal is activated:

• C3 (output cap) 1uF to 10 uF, for better bypass tone. UPDATE: 4,7uF
• C25 10uF to 1uF, to make the effect tone equal to the bypass mode.
• Remove R12 or change to 1M or 2M2, the original 100K + 1uF make a "tone control" in the signal.
• Remove C16, for more high end on the effect.

See the picture:

* Use Boss schematic above to mod this Behringer stomp box.
** C9 could be reduced if there are some increase of the bass of the tone, when the effect is on.

Graphic equalizer Boss GE-7 or Behringer EQ700 mod

Mods for a more transarent bypass and effect:

• C10 (output) 1uF to 10uF.
• C20/R28 and C27/R36 open the path or remove then.

 

See the picture: 

 

 

*Use Boss schematic above to mod this Behringer stomp box.

Overdriver / Distortion Boss OS-2 or Behringer OD-100 mod

• Change R25 + R26 to a 22K trim pot, for adjusting the distortion level and balance overdrive and distortion.
• Change C12 to 10uF capacitor for a transparent bypass.
• Change C7 to 1uF cap for a focused effect output with less bass (to compensate the C12 change).

See at the picture all described mods above in red:

*Use Boss schematic above to mod this Behringer stomp box.

Compressor Boss cs-3 or Behringer cs-100 mod

 

 Bypass buffer mod (for more transparent bypass):

• Input capacitor 22nF to 47nF.
• Output capacitor 1uF to 10uF.
• C15 47nF to 1uF.

*Use Boss schematic above to mod this Behringer stomp box.