I had been wanting to build Craig Anderton’s graphic fuzz. But I had never gotten around to it. Though I did find an old 10 band EQ on the street that I thought would make a home for that project. 

Lately the idea had struck me to make a smaller version with two Tube Screamers. This would it in a B sized box and be easier to build. 

I have not built this yet. I want to try and get around to it in the next couple weeks. Here’s a drawing of the layout I planned. 

I started with jack Orman’s son of Screamer.I figured I’d use two Drive and Tone controls, followed by a Mix and a Volume. There are two versions of the Mix control in the notes. 

Here’s a layout for the MosFET boost. The drawing is pretty sloppy. But this shows the schematic and layout I used for my build. Seemed to work well. 

Here’s a link to a picture of my build. Here’s a link to the schematic on Muzique.com

I like the Tim Escobedo’s Ugly Face I’ve built about 7 now. This is a really fun pedal. Total Sonic Mayhem. Not for Jazz, though I’m hoping someone will take that as a challenge…

Something that is not really a problem, but has always bothered me is the volume. The Ugly Face is extremely loud. The output swings about 0 to 9V. Which leaves a small usable range on the volume knob.

Lately I have been adding a 68K resistor in series between the volume pot and the output from the circuit. My measurements seemed to suggest an 80K would be better but I had 68K on hand. The the thing is still way loud. But now at least volume pot seems to have a more usable range.

Built Jack Orman’s Son of Screamer last night. Fired up the first time and sounds pretty good. I have not owned a Tube Screamer before. After building this I’m understanding the complaints about the “mid hump” in the sound. The sound is very focused in the mid range.

There seem to be many mods for this floating about. So I thought I’d build a second one to compare to the first. I picked out the LovePedal Eternity. There is a good thread about this one here.

From the schematic it looks like the Son of Screamer with a few changes in parts values. From what I can see it seems the Eternity just increases the lows as described in this article Muzique.com.

Of course the next step is make the RunOffGroove Tube Reamer for a final comparison. Looks like the Tube Reamer adds event more.

It looks C2 is increased from .047 to .1, from SOS to Eternity, and doubled again to .22 in the Tube Reamer.

With a great idea from Brian Marshall of Subdecay I managed to get my 9V sample and Hold working. This ties Brian’s Sample and Hold to the Colorsound Wah. This works pretty good. The range of the effect could still use some adjustment.