Re: Diesel Diefet - the quest: Weird tone stack response

Posted by motterpaul on Apr 26, 2015; 3:15pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Diesel-Diefet-the-quest-Weird-tone-stack-response-tp19847p19891.html

The things I continue to learn still amaze me.

It is a new idea to me that too much gain would cause gating effect, but OK. I do know the circuit sounded smoother and did not gate with the PN4393s, and was louder. It also allowed me to get the perpetual sustain on certain notes when I did not get even close with j201s.

Still, in general... while this particular circuit does seem to have a lot of overdrive sound - it doesn't have that much volume, no matter what you use. That seems somewhat counter-intuitive but it is true.

The hard part is that everything is so interactive. This circuit is similar to Sabra Cadabra where even the guitar volume knob is interactive. With Diesel, when you lower the guitar volume it doesn't clean up at all, it just gets lower in volume until it sputters out.

This oddest reaction seems to come in the TREBLE pot, as I described. The same thing happened to that pot when I tried an TL082 to replace the TL072 specified.

So, I was think that maybe changing transistors in just the right gain stage might help, as you suggest.

EDIT: sorry, I see that is not what you said, but I did think about swapping transistors, also, but I will try bypassing the 1uf on stage 1.