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Hi all, just built a Divided Octave and love it both before and after my Gonzo Fist Fuzz, so I am going to build another so I always have both options on tap. (And who knows, one before and one after, together, might be great too!)

That said I’m hoping to perform a couple of mods on this next one and any help/advice will be hugely appreciated.

1. I’m hoping to make the octave down on this next build one octave rather than two. Would love to know if this ease easily achievable (like on the MXR Blue Box).

2. I’d like to reduce the volume of the Ringer On signal so it’s it’s closer to the volume of the of the Ringer Off signal

3. Global Volume Out - I’m pretty sure I can accomplish this by simply adding a pot across the output / ground of the Divided Octave (not looking for any more volume, just a bit of attenuation).

4. Going to make Bass Only momentary instead of latched (this i can do without advice! )

Thanks!

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Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Many thanks!

_________________
Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

*** SOLVED ***

I just answered my own question right before hitting send on this post, but figured I would still send it in case anybody else attempting this mod comes up with the same question and moment of confusion. The reason I was not getting continuity between R31 and pin two of IC1 is that my board is still unpopulated and the single jumper on the board is what completes this continuity. Once I probed each end of those jumper eyelets I could tell that it was the missing link between that 82K resistor and pin two if IC1.

Thanks again for your help on this. I finally have some time off work and I’m getting around to it. Just a quick follow up question:

I was probing around the board (still unpopulated) for continuity between the 15K resistor (R59) eyelets and the 4013 (IC8) to confirm which end of the resistor I need to tap for the “1 or 2” octave toggle mod, and while doing so I decided to poke around at the 82K resistor (R31) eyelet that attenuates the ringer volume. I can tell from the parts list that there is only one 82K resistor, so I can’t imagine I’m probing the wrong one, but I can’t seem to get continuity between it and pin two of IC1. I get continuity between pin two and the 68K resistor (R32), and the 33p cap (C21), but nothing from the R31 82K resistor (at either end of the resistor and using the eyelets at the top or bottom of the board), and pin two of IC1. Am I possibly missing something in my interpretation and understanding of the schematic, or should I indeed be getting continuity between the 82K R31 and pin two of IC1?

Many thanks for your time.

_________________
Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

While I’m experimenting with this Divided Octave circuit is there any other mod anyone would recommend trying out?

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Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

You need to install the jumper for the 82k to have continuity.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

For anyone else who wants to attempt the 1 or 2 octave down switch mod . . . tapping the R59 15k resistor to an spdt so it switches from IC8pin13 to IC6pin7 gives a much cleaner single octave down than switching to IC8pin2/11. The single octave from IC8pin2 was quite garbled, but I was pleased to find that the single octave out of IC6pin7 was as smooth as two-octave drop from IC8pin13. Many thanks Keith!

Audio examples of this mod for anyone who's interested:
BYOC DivOct ByPassed
BYOC DivOct -1oct IC8pin2
BYOC DivOct -1oct IC6pin7
BYOC DivOct -2oct

_________________
Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

Nice work!

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Threw together a quick video of my modded Divided Octave.

Mods are:

Bass Only footswitch made momentary instead of latching

Ringer Toggle moved to footswitch

Stability Toggle moved to footswitch (Why?)

Added ability to toggle between -1 octave and -2 octave and put on footswitch
Disconnect R59 (15k) resistor from pin13 of IC8. Connect the open end of R59 to centre lug of SPDT (foot)switch. Attach one outside lug to pin13 of IC8 and the remaining lug to pin7 of IC6.

Added Ringer volume pot
Replace R31 (82k) resistor with a 22k resistor in series with lugs 2 + 3 of an A100k potentiometer.

Added global volume pot
Replace R32 (68k) resistor with a 5.6k resistor in series with lugs 1 + 2 of a B100k potentiometer

https://youtu.be/WMCAbTG24kM

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Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

Very cool. You've put a lot of work into that circuit. Thanks for sharing!

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Thanks for the help!

_________________
Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company

The final package

_________________
Builder of weird fuzz sculptures at the Ketchup 'n' Cream Electric Company