Tonefiend Forum

Welcome Guest 

Show/Hide Header

Welcome Guest, posting in this forum requires registration.





Pages: [1]
Author Topic: Built in octave circuit
KieranWyrd

Posts: 3
Permalink
Post Built in octave circuit
on: May 11, 2013, 04:40
Quote

I was wondering if any of you had any advice on putting an octave down circuit in a guitar? I've got a spare push pull and want it to control an octave down feature. Just straight octave down, no controls,just octave down. Help? I'm terrible at this sorta thing

smgear

Posts: 170
Permalink
Post Re: Built in octave circuit
on: May 11, 2013, 07:00
Quote

Good question. I've contemplated this before. The main issue is whether you are just looking for something basic that will work for walking a bass line or whether you want chords to convincingly track an octave down. If the former, there are some old schematics around that will sort of work but tend to be a little warbly/envelopy. If you want full tracking, then you really need a digital processor. Then there's the issue of whether you want to switch to only the lower signal or whether you want them both blended.

A decent analog down is the old boss OC2. There are a lot of schematics around for that and plenty of threads on other forums. Just google boss oc2 schematics and you'll find plenty of great info. Here's one, but I can't vouch for its quality https://www.sabrotone.com/wp-content/uploads/2011/10/BossOctaverOC2.gif. Or, you can just buy a used one on ebay for about $60 and drop the circuit in your guitar. It sounds like you want the settings pegged, so you can just set it and leave the knobs off and/or just replace the pots with some resistors. It will be smaller and probably cost you about the same as a couple rounds of experimentation (not to mention the time factor). I don't have them on hand, but I know there were a bunch of diy projects (probably anderton and a couple others) in the 70's for different textures of octave down circuits. The OC2 sounds much better than any of those to my ears though. Another good option might be the Pearl OC 07 circuit https://www.freeinfosociety.com/media/images/4093.jpg. But again, it's pretty large for dropping in a guitar.

I'm sure others here are more knowledgeable about some of the modern digital alternatives, but I really dig the EH Pog/Mini Pog/Hog processors. You could theoretically pull the circuit out of a mini pog and drop it inside, but I personally would rather just leave that in pedal form.

side note: the analog octavers seem to track better after some compression. I'm not suggesting that you need to add that to your circuit, but you might want to do some experimentation if your breadboard octaver tests aren't sounding up to your expectation.

KieranWyrd

Posts: 3
Permalink
Post Re: Built in octave circuit
on: May 11, 2013, 08:49
Quote

Most of the octave circuits seem pretty huge, I'm definitely gonna add one to a guitar later but as I'm currently working on a 335 style it just ain't gonna fit. I'm doing my own take on the Pagey Project Phase 2, adding a few extra features and a third pickup but I'm still stuck with one push/pull I have no idea what to do with...

smgear

Posts: 170
Permalink
Post Re: Built in octave circuit
on: May 11, 2013, 11:53
Quote

let us know when you finally do it. I'll be interested to hear the outcome. I'm planning a couple steel framed guitars which will have a big removable block for effects so this is one of options I'll be considering when I finally do it.

For now, I'd suggest either Joe's germanium booster or a little fuzz circuit like the one he just posted. Depending on the style of playing and/or other effects down the line, a little compressor or maybe even a switchable buffer could be cool.

KieranWyrd

Posts: 3
Permalink
Post Re: Built in octave circuit
on: May 11, 2013, 12:32
Quote

The octave or my take on the Pagey Project Phase 2? It may be a while on the octave as i currently inly have one electric but I'll post pics of Pagey Project when it's finished, I decided on merging the old distortion booster and treble/bass booster you see on some old Vox guitars like the Ultrasonic. I'm gonna wire them up to a push/pull for on/off and two thumbwheels underneath the pickguard for controlling the drive level and the treble/bass boost level. I figured it would be best to have the whole project done by a professional as it requires routing, drilling and some pretty complex wiring. I think it's probably a bit big for my first project and I also only have one guitar so if I mess up....I'm pretty stuffed!

Pages: [1]
Mingle Forum by cartpauj
Version: 1.0.34 ; Page loaded in: 0.026 seconds.

Comments are closed.