22/7 on OSH Park

Built and test this second version of the 22/7 by RunOffGroove.com. Sounds good. This is a great alternative for Big Muff fans. The OSHPark project is public and verified. Check it out on my projects page.

22/7 is a Big Muff built around CMOS inverters in place of the transistors used in the traditional BMP circuit. The CMOS inverters have a tube like sound when over driven.

If you don’t want to build your own this one is for sale on Reverb.

UBE Screamer PCB v1.1

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.

Build your own! Check out my OSH Park projects page. Or buy this one at my Reverb shop.

UBE Screamer by RunOffGroove

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.

Ugly Face on OSH Park

Just published the Ugly Face v 1.1 to OSH Park. Built and tested, it works well! This is classic DIY project, it’s almost a rite of passage for new DIY stomp box enthusiasts.

The Ugly Face is more of a synthesizer than fuzz pedal. It produces square output from the input guitar signal. You can imagine the internal oscillator running whenever the input signal reaches a threshold. This gives you frequencies above or below the input frequency at the output. The Ugly Face also adds an envelope control to animate the oscillator frequency. The sound is surprisingly more musical than a lot of other “harsh” distortions.

Order some boards at OSH Park and follow the build docs below to make your own.

Guitar thing

This finely crafted guitar body was made from plywood with a mildly figured masonite top. The construction is much like the Danelectro guitars from the early sixties. The body shape is a Gibson Melody Maker, the neck and bridge are from a Fender Telecaster. The pickup arrangement and wiring will use three pickups and a five position switch like a Fender Stratocaster.

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OSH PARK

This is a really cool service that manufactures open source PCB designs. You can order any of the open source designs on the site. Most of the stuff is not stompbox oriented. It takes a little google-fu to search up stompbox projects. You can also upload your own designs.

You have to order 3 PCB minimum for each board you order. The orders seem to get ganged with other orders so it sounds like your order doesn’t get printed immediately. That said the prices seem very reasonable.

https://www.oshpark.com/

I just placed an order for a few PCBs. I’ll post again when the order comes in…

Precision SG jr

Looks good

Everything was packaged well and ship timely.

A few disappointments

Ideas

I want a soapbar. The dog ear route is not the same size it’s both larger and smaller.

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I’m thinking about modifying the headstock. As is the tuners on the bass side are little closer to the edge than the treble side tuners. Also the proportions are not as aesthetically pleasing as the Gibson headstock. I’m thinking I might make the sides straight like a melody maker headstock. To make this happen I can flatten the sides. Leaving quarter inch of material on the outside, will leave the shape slightly flared, as the holes are drilled on a subtle diagonal. Or, I can cut the sides straight fill the holes and re drill.

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Some Fuzz Faces

Finally getting back to building some Fuzz Face’s I started a while back. Here’s a picture, you can see the sockets for the transistors, two sets of three in a row, in the center. The input socket is two small socket pins on the right center, and the output cap is on the bottom center.

Fuzz Face with sockets
Fuzz Face with sockets