A SIMPLE OCTAVER DOWN

Stompboxes circuits published in magazines, books or on DIY electronics websites.

A SIMPLE OCTAVER DOWN

Postby jovesdies » 21 Feb 2013, 14:33

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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Re: A SIMPLE OCTAVER DOWN

Postby ~arph » 21 Feb 2013, 15:26

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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Re: A SIMPLE OCTAVER DOWN

Postby jovesdies » 21 Feb 2013, 16:48

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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Re: A SIMPLE OCTAVER DOWN

Postby jovesdies » 23 Feb 2013, 15:59

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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Re: A SIMPLE OCTAVER DOWN

Postby jovesdies » 23 Feb 2013, 20:55

A quick picture in a 1590a box
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Re: A SIMPLE OCTAVER DOWN

Postby charlje » 21 Jul 2013, 23:02

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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Re: A SIMPLE OCTAVER DOWN

Postby ~arph » 23 Jul 2013, 10:59

Yes it sounds very nice indeed!

I just ordered some of those IC's to experiment with.
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Re: A SIMPLE OCTAVER DOWN

Postby rjpluna » 13 Jan 2015, 13:33

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

THank you!
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Re: A SIMPLE OCTAVER DOWN

Postby Duckman » 13 Jan 2015, 15:20

Datasheet anyone? Thanks 8)
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Re: A SIMPLE OCTAVER DOWN

Postby Dirk_Hendrik » 13 Jan 2015, 19:36

Sorry. Plain out of planes.

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Re: A SIMPLE OCTAVER DOWN

Postby Duckman » 13 Jan 2015, 19:43

: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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Re: A SIMPLE OCTAVER DOWN

Postby Dirk_Hendrik » 13 Jan 2015, 23:43

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.

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Re: A SIMPLE OCTAVER DOWN

Postby Duckman » 14 Jan 2015, 03:10

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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Re: A SIMPLE OCTAVER DOWN

Postby mictester » 14 Jan 2015, 14:33

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:
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Re: A SIMPLE OCTAVER DOWN

Postby Duckman » 14 Jan 2015, 18:05

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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Re: A SIMPLE OCTAVER DOWN

Postby Dirk_Hendrik » 14 Jan 2015, 19:05

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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Re: A SIMPLE OCTAVER DOWN

Postby ~arph » 31 May 2016, 09:00

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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