A SIMPLE OCTAVER DOWN

Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
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jovesdies
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Post by jovesdies »

Hi,
this is my little contribution.
A simple octaver (oune octave down) based on M51134 IC, a chip found in old DOD MEATBOX and Behringer bass amps.
The octave works well with bass guitar. There is a sort of divider noise but with very low volume . This noise disappear with a buffer in front.
Enjoy.
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m51134 octaver.pdf
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~arph
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Post by ~arph »

Mmm.. really interested in how this tracks and what it sounds like got any links to clips?

Never mind, found the meatbox vids and it sounds pretty bad :mrgreen:
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jovesdies
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Post by jovesdies »

The Meatbox sounds really bad but this octaver is NOT THE MEATBOX AT ALL !! I will post a quick sample tomorrow....

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jovesdies
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Post by jovesdies »

here is a little sample. The first lick is bass only. The octave level pot is about 1/3.
Two corrections :
- R9 set the input gain . Try with values from 82K or change it with a 200k pot (higher values causes distortion)
- C6 set the low frequency cutoff. Try 1uf. Higher values causes rumble noise
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m51.rar
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jovesdies
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Post by jovesdies »

A quick picture in a 1590a box
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rpm2.jpg

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charlje
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Post by charlje »

it sounds great !
the plan is very clear, much more minimalist than the OC 2
i'm really interested in building one...
quite busy those days, but I will plan this for september.
maybe it could be the occasion of a transcription on CAD

did you mount it on stripboards ?

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~arph
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Post by ~arph »

Yes it sounds very nice indeed!

I just ordered some of those IC's to experiment with.
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Post by rjpluna »

Hello there, i'm new to this forum.
Could you, please, send me the PCB layout?

THank you!

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Duckman
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Post by Duckman »

Datasheet anyone? Thanks 8)

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Post by Dirk_Hendrik »

Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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Post by Duckman »

:hug: Thanks!
First, I was: "what is he talkin' about?... weird sense of humor" After download, I got it :lol: :applause:

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Post by Dirk_Hendrik »

Errors like that tend to make my day. "Franger" from the Ibanez UE400 PCB silkscreen, "Batter snap" from Shin-Ei, etc :mrgreen:
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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Post by Duckman »

Dirk_Hendrik wrote:Errors like that tend to make my day. "Franger" from the Ibanez UE400 PCB silkscreen, "Batter snap" from Shin-Ei, etc :mrgreen:
:applause:

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Post by mictester »

Dirk_Hendrik wrote:Errors like that tend to make my day. "Franger" from the Ibanez UE400 PCB silkscreen, "Batter snap" from Shin-Ei, etc :mrgreen:
One PCB I saw a while ago described a 4013 as a "jewel frip-frop"..... :slap:
"Why is it humming?" "Because it doesn't know the words!"

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Post by Duckman »

mictester wrote:
Dirk_Hendrik wrote:Errors like that tend to make my day. "Franger" from the Ibanez UE400 PCB silkscreen, "Batter snap" from Shin-Ei, etc :mrgreen:
One PCB I saw a while ago described a 4013 as a "jewel frip-frop"..... :slap:
:hmmm: I can see a whole new thread here: Professional Orthographic Barbarism :mrgreen:

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Post by Dirk_Hendrik »

There was an effects related page that showed a schematic excerpt with a frip-frop years ago. No clue which one.

the jewel is pretty brilliant!
Sorry. Plain out of planes.

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Post by ~arph »

Resurrecting an old thread. I am transferring the hand drawn schematic to Eagle, but I can't locate R18 and R19 on the schematic. ( both 47k )
Also on the BOM the two 100R's in the power section are omitted.
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