This is a version of the UBE Screamer using the 4069 in place of the 4049. Essentially these chips are the same. They both contain 6 inverters. The 4049 is a 16 pin DIP while the 4069 is a 14 pin DIP. Electrically the should the same but the pin arrangement is different.
The original circuit from RunOffGroove.com is a very interest evolution of the Ibanez Tube Screamer TS-808. RunOffGroove has an article describing how to make an adapter that adapts a 4069 to a 4049.
I decided to just make another PCB since I had already created a PCB for the original 4049 circuit. The adapter would work but ordering some PCBs from PCBWay.com costs about $25 for 10 boards which worth the time spent hacking a solution. And, the boards are well made and reliable!
This is an update of the UBE Screamer board. Same circuit just revised. I had these boards fabricated at PCBWay.com. The quality is very great!
The UBE Screamer is a very interesting take on the Ibanez Tube Screamer by RunOffGroove.com. It’s the general circuit topology of the TS-808 but uses CMOS inverters in place of the transistors and op-amps in the original.
This is the second version of the UBE Screamer board. This version fixes a mistake with the reverse polarity diode. I’m calling this ready for public consumption and will add it to the OSH Park projects pages soon.
The enclosure is grounded through the jacks. The bottom cover though doesn’t make an electrical connection to the main enclosure body due to the powder coat. I used a drill bit to remove the powder coat inside the count sink recess, this allows the screw to make contact with the back cover for full shielding.
I recently updated the board with a few minor changes. You can order the updated board from PCBWay.com.
This UBE Screamer by RunOffGroove.com is a unique twist on the venerable Ibanez Tube Screamer TS-808. It replaces the op-amps and transistor stages with a single hex inverter using an inverter in place of each op-amp and transistor. This has a great sound that stands up to all of the other overdrives. Read more about it over at RunOffGroove.com
Well worth the effort, build it yourself! I’ve created a public project at OSH Park. Order boards and follow the build docs.
Here’s a project that I built up some years ago. This never found it’s way into a box. I dug it out and decided to try and box it up. Difficult with the number of switches and knobs. I think I have a viable plan to shoehorn it into a BB sized. box.
This is a pretty interesting distortion box. It’s sort of a Tube Screamer, Rat, Distortion +, with an Octave up. When I finish it up it should be all of those things in one box.
This was built using the layout generously provided by R.G. Keen of GEOFEX fame.
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.