Fuzzdawgs big list of verified overdrive mods

Fuzzdawg · **Joined:** Thu Feb 23, 2006 3:45 pm **Posts:** 1144

here you will find ALL mods that are verified, and descriptions of what they do. this thread will be locked (because i don't want it to get bogged down with discussion), but i will constantly be updating it and adding new mods and stuff, as i find them. i will start with this:

the generic component switching mod!

this is a mod to have the option to change between two generic components. components that are ideal candidates for this mod are: resistors (such as the "regular gain/more gain" mod), capacitors (such as the "range" mod), and diodes (such as "stock/assymetrical clipping" mods).

i promise there is more to come later!

Fuzzdawg · **Joined:** Thu Feb 23, 2006 3:45 pm **Posts:** 1144

This is the langraff mod posted by Kahel. It is a clipping mod. It is shown in context for the tubescreamer kit, but this can be applied to any OD, fuzz, or distortion that uses diode clipping.

I was asked privately if I could make a drawing of how to implement the diode clipping switch from a Landgraff on a BYOC overdrive, and I can, so here it is:

Now, if no diode clipping at all makes no sense to you (the middle mode) and you'd rather want a third mode, you should use a DTDT on-on-on switch instead. These have internal connections between lugs 2-3 and lugs 4-5, effectively making them 1P3T switches with outputs on pole 1, 4 and 6:

Small Bear doesn't carry any of these, but Mouser has a few. Do a search for "DPDT on-on-on".

Of cource, if you want to get real fancy you could get a small piece of veroboard, add socket strips across it, and have three customizable modes you could play around with forever. Like this:

8) K

verified by byoc

Fuzzdawg · **Joined:** Thu Feb 23, 2006 3:45 pm **Posts:** 1144

here is a quick description of what goes on when you perform both the "lower minimum distortion" mod as well as the "more gain" mod.

duhvoodooman wrote:

With the stock resistor values, the Screamer's minimum gain factor calculates to 12 and the max setting to 118. If you change just the high pass filter resistor from 4.7K to 1.5K, the min and max gain will change to 35 and 368 respectively. Thus, you've lost some of your ability to clean up the pedal's output at the low end of the gain range vs. the stock pedal. However, if you also reduce the drive resistor from 51K to 20K, the min/max values change to 14 and 348. So you lose 2% of max gain (big deal!) but cut the min. gain value by a factor of almost three and essentially get back to the min. gain of the stock pedal.

I've used a 1.0K filter resistor with a 10K drive resistor in my Screamer mods, which gives a min/max of 11 and 511, which I've been very happy with.

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Fuzzdawgs big list of verified overdrive mods

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