Hi-Gain Nasty for 4049'ers

[WGTP]

Latest CMOS 4049 distortion on the breadboard feeding a Valve Jr.  Thanks to ROG for the gyrator education and Sebastian for additional info.  Using a hi-gain treble boosting gyrator may diminish the need to drive the 4049 with other circuitry for the best sound.  It has more gain in the correct frequencies than using a 1M resistor in the feedback loop.  Thru the 2nd and 3rd distortion stages the bass is reduced and then restored by the 4th stage bass boosting gyrator for some thickness and cabinet chunk.  This has more tube like compression "smush" than any distortion I have ever built.  Changing almost any value effects the tone, so mod with care.  

Tip:  Running a distortion into amp simulation software with headphones on allows you to hear, good or bad, what is really going on with it.  Originally this was making some unpleasant sounds, due to excess gain, that I couldn't hear coming thru the amp.

Keep rocking in the new decade and thanks to all on the forum that help those of us electronically challenged guitar players.

http://www.aronnelson.com/gallery/main.php/v/WGTP/Hi-Gain+Nasty.jpg.html

[Brymus]

I been waiting to see how that worked out . 
I was hopng you would make the gain of the gyrator stages adjustable to taste.(pots)
I will hopefully try it soon.

[askwho69]

this is good! more LUCK

[Ripdivot]

Where do the 2 points on the schematic marked "G" connect to? Ground?

[WGTP]

The G's are connected to the ground row on the breadboard, like all the other grounds.  It was a drawing issue.

The resistors in the feedback loop affect the gain, but also the filter tuning.  I adjusted the caps in the treble gyrator and the resistor to ground to increase the gain and tune the filter to peak around 2.5kHz with a Q that allowed for a broad boost range.  Still mess with the EQ tuning alot.