Super-Freq

Preliminary Octave Fuzz Idea

Here’s an idea based on the Kay F-1. Here’s the Kay.

The Kay uses the two back to back transistors to create an octave. Notice Q2 supplying an output from both the collector and the emitter. I’m guessing the collector and emitter resistors R6 and R7 need to be equal for this to work. The signal at C5 is the inverse of C4.

I thought I’d add an extra transistor and a pot to mix the original signal and the octave. Here’s a preliminary schematic. This still needs some part values. I decided to move the clipping diodes to the new transistor to raise the output of the octave section.

To make this work I’d need to bias Q2 and Q5 from the output of Q1c, not sure if this works, though it seems like it should.

Add comment | August 11th, 2011

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Building an Ugly Face

I built an Ugly Face last week and took some pictures. This uses the Ugly face PCB I made and the typical DIY stompbox parts. I used the alpha 12mm pots in a B sized box. The more common 16mm pots would also work.

3 comments | April 17th, 2011

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Pignose

The DIY swap meet was great. I saw this Pignose amp at one of the tables. Normally this wouldn’t really interest me. But, my wife had put this amp on her Amazon wish list. They wanted $40, I didn’t have the cash on hand. Luckily I sold a few things so I got the Pignose at the end of the day. Turns out one of the guys at the table lives in my neighborhood.

Anyway, here’s a few pictures. Gotta love the pigs nose shaped switch on the front.

My wife immediately found some batteries and tested it out. I try to encourage this behavior to reinforce the idea that it’s good to send me to the swap meet. Sort of like send Jack to the village with the cow. But, in this case the cow is cluttering the house and magic beans are something that makes everyone ooh and ahh.

I had been thinking about building a Ruby for some time, but had never gotten around to it. At $40 the Pignose even starts to look like a good deal compared to the Ruby. I’d have to order all the parts and spend some hours putting all together, and finding a good speaker could be problem. So all said the Pignose was a good deal.

Of course it does offend my DIY sensibilities. I have to admit that my first thoughts were to build a Ruby inside the Pignose! Luckily (for the Pignose) making it a gift to my wife has saved it from being taken apart.

Looks like it runs on 6 AA batteries, hmmm 9V… The idea of creating a small amp that runs on 9V is a good one. The Ruby gets great reviews on the internet. Not sure what type of speaker they use in the Pignose. But I’m sure it’s a guitar amp type. Th sound is pretty good, not great. It has an over driven quality, though not distorted. It also gets pretty loud. Not sure could annoy the neighbors, but I think I could get my child to say “stop, stop, stop playing that”.

One area where I could see improving the thing is to swap the DC jack on the back with a standard Boss style 9V type. The 1/8″ jack is so uncommon and inconvenient.

Add comment | February 23rd, 2011

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DIY Electronics and Musicians Swap Meet

The DIY Electronics and Musicians swap meet was last Sunday. Good fun was had by all. I’m starting to realize I’m seeing the same people every year. Vendors and customers alike. Which is not a bad a thing. It was nice to hear the guy I traded the Fuzz Factory clone to was still enjoying it. I had traded for a small amp which I brought with me to test stuff with. It’s great to hear that everyone is happy. Then again it would great to see some new faces and open the Swap up to more people. There’s so much great stuff to be had, we need to attract the people to come and take a look at it all.

Joe Gore shared the table with me. He had a great looking line of stuff. The guy is a tireless perfectionist. The effects themselves sounded and looked great.

There are a few pictures of Joe below. The majority of stuff on the table was his. I didn’t have much this year. There are couple shots of what I brought at the other end of the table.

Not sure why, but no one likes Big Muffs? I’ve brought the same two big Muff’s with me for the last 4 or so years and haven’t sold one yet. They look good and sound good, well as good as any Big muff. The Ugly Face is popular. Of course these are unique I suppose. I sold a few PCBs. Anyone who bought feel free to contact me if you have any questions about putting it together. People asked about Germanium Fuzz, they seem to want Tone Benders more than Fuzz Faces. I had a few requests for Tone Benders last year also. Come to think of it, I was trying to trade Steve for his Tone Bender clone the year before last.

If you are the guy who lost the DIY sustainer at the swap, you left it on my table. I didn’t notice until after you had keft the building. I have it, contact me and I’ll see about getting it back to you.

3 comments | February 23rd, 2011

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Sustainers

I was at the DIY swap meet last weekend where I was shown a DIY “e-bow”. It consisted of an electric motor, 9V battery and switch. The shaft of the motor had what looked like a propeller made of electrical tape. The idea was to turn the motor on and hold the device so the spinning “propeller” of tape brushes the strings of your instrument thus creating a sustained sound. (If you left this at my table at the swap let me know and I’ll try and get it back to you)

Sounds pretty kooky at first, but this is not the first device to use this idea. But, before we go any further an explanation of sustainer and e-boy are in order.

The name sustainer, I’ll guess, comes from the sustain pedal on an organ or piano. The idea is to add sustain to the instrument. With stringed instruments you need something to drive the strings. Violins, violas etc, use a bow. I seem to recall reading about some type of hurdy gurdy that rested a spinning wheel on a string to act as a infinite bow. (Feel free to chime in with some details if you like.) When it comes to guitars, electric guitars that is, the classic sustainer is amplifier feedback. The sound coming out of the speakers begins to drive the strings, which in turn creates more output from the pickups. I have often seen guitar players control feed back in various ways, one method is by pressing the headstock against the amplifier cabinet, which is a good way transfer the sound vibrations directly from the amp to the guitar.

Beyond feedback people have come up with very clever methods sustain. These fall into two methods: Physically vibrate the string or magnetically vibrate the strings. (Note that there have been several stompboxes called “sustainers”, but these are really more in the compressor limiter category).

Magnetic sustainers work on the concept of using an electro magnet to drive the strings. Really this is almost the same as driving a speaker cone. A signal from your amplifier is used to create a fluctuating magnetic field. This field pulls or pushes the speaker cone towards or away from a magnet in the speaker. The field itself mirrors the audio.

Magnetic sustainers use the same concept as a speaker. The difference that magnetic field is pulling at the strings on your guitar. Magnetic sustainers can be either hand held, like the E-Bow, or mounted in the Instrument like the Sustainiac.

The E-Bow is a small hand held device that contains small pick up similar to a guitar pickup and magnetic driver. The signal from the pickup drives the driver which makes the string vibrate. The more string vibrates the more signal is generated at the pick up which in turn creates a stronger signal at the driver. Sounds a lot like amplifier feed back in some ways.

The Sustainiac is system that replaces the neck pick up on an electric guitar. It works with the bridge pickup, amplifying the signal and powering the driver in the neck pickup. Sounds a lot like the E-Bow, except the Sustainiac mounts in the guitar. Moog music makes a guitar that has six magnetic sustainers, one to drive each string.

The next category of sustainers are mechanical sustainers. These would work by physically vibrating the strings. There was a device called the Gizomtron (love the name) that mounted on your guitar and used small wheels to drive the strings. Sustainaic also makes a sustainer, called the Model C, which attaches to the head stock and provides mechanical sustain by vibrating the headstock. Which brings us back to the motor and the 9V battery. Can you make a sustainer with an electric motor? The Gizmotron proves this is possible even if their device was never popular and had some problems. You really just need some way to get the strings vibrating. Here’s a video of Van Halen using an electric drill as a slide. The spinning action of the chuck is obviously creating some of the sound. Many times the simple solution is the best. There’s probably many off the shelf products that double as sustainers. Here’s the Lips from Anvil using a Dildo. Of course anything that effects the length of the string will effect the pitch. This has been done a few times by various others.

Not sure what else to say on the subject. It seems ripe for experimentation. If you don’t fancy expensive Moog guitar you can probably whip up your own sustainer from parts around the house!

2 comments | February 21st, 2011

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New Stompswitch

You’re probably familiar with the classic blue 3PDT stomp switches that have been around for some years. These are ubiquitous in the stompbox realm. Everyone uses these, from the major manufacturers to the small builders and hobbyists. They work well and the cost is very reasonable. I paid $13 for an offical Fulltone 3PDT about ten years ago, but these days they can be had for $4 or $5 each. Which is very reasonable, though it does make the switch one of the most costly parts in any box.

Recently I ran into http://www.mammothelectronics.com/. Turns out they carry an alternative to the standard blue stomp switch, one that I had never seen before. I bought 5 of these to give them a try.

First impressions say they look well made. The travel on the button is less than the travel on the blue switches, about the half. The switch itself is smaller in all dimensions. It’s not a lot smaller, but the size difference could be significant in a tight project. The switch makes a satisfying click.

The nuts are a little smaller and look a little cheaper, compared to the nuts that come on the blue switches. The nuts look like the stamped nuts that come with some toggle switches. This is a little disappointing. I like having a tight fitting nut that you can get a good grip on and tighten up well with a wrench. These look like they would be hard to tighten up close to the surface of a box, and the nuts are so thin the wrench might slip off.

I’ll have to build something with one of these switches before I can say how well they work in real life.

Add comment | January 7th, 2011

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Switching Madness

Mark Hammer on DIYStompboxes gave me the idea to add a momentary switch to a Ring Modulator. After thinking about this for a while I thought it be great to have both a momentary and bypass switches.

The momentary switch would turn the effect on when when the effect was in bypass or turn the effect off when the bypass switch had the effect engaged.

I posed this to the DIYStompboxes and Phector came up with a good solution. Here’s a picture I drew up with Eagle.