ilovefuzz.com

Hello,

I am building a GGG Rodent, and would like to build it to where it would excel for the electric bass guitar. I have done little research, but what I have found so far is from fsb.org. It was recommended that the values of C5, C6, and C8 be doubled (Le PCB: http://www.generalguitargadgets.com/pdf ... a841b3e85a Le Schematic: https://www.generalguitargadgets.com/pd ... a841b3e85a). Furthermore, I believe I will replace just one of the diodes with a red LED (half Turbo, half sexxxy).

Another thing I was wondering about was the Ruetz mod. My understanding is the resistors that are messed with (47R, and 560R) determine what frequencies are shunted to ground. If I were to just get rid of this RC network, would I just have a full frequency distortion?

Thank you for any insight,
Franz Propp

I think it is the capacitors in that determine the frequencies affected. The resistors determine the gain (or lack thereof) for those given frequencies by controlling the amount of signal that gets to the opamp to be boosted. The smaller the resistor, the more signal goes to the opamp, thus the larger the comparative boost. The larger the resistor the lower the frequencies affected.

If you wanted a flat frequency, I think you could remove both capacitors and just have the signal going to the op-amp with one resistor to set the gain of the entire frequency. But that doesn't mean you'll necessarily get a flat frequency response. It just means that one portion of the circuit that affects frequency response has been removed. You may not like it.

This seems like it might be the perfect place to use that cool trick someone just taught me a few threads down. First you do the "Reutz mod," effectively removing the higher frequency branch of the circuit. Now you just have one capacitor to dictate a frequency range to boost and one resistor to tell you how much to boost it.

Build a "variable capacitor" circuit to use as the capacitor and use a pot for a resistor. Then you have control over both frequency and amount and just mess with it until you get a setting you like. If you were to turn your variable capacitor down to 0 and your resistor to 0 ohm, it would be the same thing you proposed to do and yield max gain across all frequencies.