In the forums mods tips section about Son of a Tube Screamer it shows that if you change the 500k pot to a 1m that will add more distortion. Next it shows having 1 1n34a in 1 direction and a 1n914 in the other direction that will add more distortion as well. I think in the past i have been confusing gain with distortion as i changed out the diff diodes with little luck finding more distortion. Has anyone had any luck adding more distortion to their Tube Screamer? Or any other ideas?

lol ... Boost the tar out of the input and add clipping diodes to the output...never actually tried...as long as there's enough voltage at the signal output you should be able to get some more slipping going there...look at AMZ, Lab Notebook

Quote from: jimbobIn the forums mods tips section about Son of a Tube Screamer it shows that if you change the 500k pot to a 1m that will add more distortion. Next it shows having 1 1n34a in 1 direction and a 1n914 in the other direction that will add more distortion as well. I think in the past i have been confusing gain with distortion as i changed out the diff diodes with little luck finding more distortion. Has anyone had any luck adding more distortion to their Tube Screamer? Or any other ideas?

drop me an email and i wll give you my mods that i do to tubescreamers

Yes, increasing the value of the drive pot works. I've also doubled-up on the diodes so there's more output. I've also increased the value of the electrolytic cap to ground in the feedbackloop to give more low end.

aron- what cap is that?

i take keep the gain pot usually at  500k  and drop the 4.7k resistor down to 1k  and drop the bring the .047uf cap up to .33uf  brings the bass down to around
482.5 instead of 723 hz.    put one standard diode in the feedback loop and one 1n4001 facing opposite directions.  increase the 510k resistor on the emitter of the input tranny to 630k to let your pickups speak.  replace the 1k with a 500 ohms to get some of your highs back..   1k to 100k in the second opamps feedback loop.  ad a switch to put in two 3mm leds to ground change 1uf cap to a 10uf cap.  change .1uf into a 4.7uf oh yeah and change input cap to .068uf.

The cap in question connects the feedback loop (ie. from chip output to input) to ground.  Not sure about the son of screamer, but in tubescreamers it's a 0.047uF.  Taking it up to a 0.1uF increases the bass and mids a noticeable amount.  Sorry, but I couldn't find the SoS schematic on the web to comment specifically on that circuit. (I think jack sells it on a CD or something..?)

Hi,

another tweak to the TS is to change the Resistor that goes from Pin6 to Pin7 of the OPAmp (Stock is 1K) change it to 3K3 or 4K7 to get more Level Overall. You can go till 10K with that Resistor (change to your taste).
But when you increase the Gain too and run the Pedal at Max Gain and max Treble (in ToneConrtol) it becomes very noisy, but i dont know, if you ever will play the TS at these settings...

bye
Oliver

I used 1meg gain pot on mine and put a switch there that can be used to disconnect the gain pot. I did some other mods too though.

I used it for making an audioclip of my cabsim prototype: http://www.hut.fi/~pjunno/temp/cabsim/sos_and_cabsim.mp3

The gain pot is disconnected around 38 seconds into the clip.