<checks PCB I had made but haven’t assembled yet>
Oh, good.
Pin 6 is the other Set and should be grounded too.
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I should have thought of that, there are 2 indeed.
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Let us know when it’s up for sale 
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Not sure what I want to do about that… for one thing it’s Azarello’s circuit design and I don’t know (haven’t asked) how he’d feel about it. For another thing there’s a big stupid mistake on the board (10uF electrolytic should be 10nF film or ceramic), nothing rendering it unusable of course but not good anyway.
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I think he might be open to it from my limited conversations with him. I would 100% get one. I actually bought some more stripboard and picked up the IC’s recently just to build it.
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This boils down to “Is it licensed? How is it licensed?”. And … if you are concerned about that you need to ask yourself: how do you know it is his design?
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He is selling a pcb and I believe a pedal kit aswell. I would ask him personally before starting competing.
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If nothing else, the panel seems fair game.
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One search on the net leads me directly to someone else who has implemented this:
the Roland SH101 has a nice neat implementation using a CMOS 4013. I sort of expect that this has been implemented by more people because dividing (clock) signals it is one of the basic uses of this chip ( it is in all the text books ). This also seems to me something one can not easily claim copy right for, but I’m no expert in these matters.
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i thought i have all components for built this Sub Osc, so go !
but infact i have not the 2 Zeners diode 5.1V, but i have some 1N4007 and 1N4004, can switch with it ?
thx
No, they’re not Zeners which is what’s needed.
You can omit the Zeners on the sub osc output. The ones on the clock divider outputs are there to limit the outputs to 0–5(ish) volts. Maybe those could be replaced with voltage dividers.
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ok, what have you do for yours ?
I used 1n4733 on the clock outputs, omitted them on the sub osc output.
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I understood, if I only do it with the Sub out they are not necessary, but if I decide to add the clock divisions to the output i need it
i have allready a good clock divider, so i will make only a Dual Sub (with no zener : a good news I didn’t have any 
)
thx
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Running out of zeners is nature’s way of making @Dud slow down.
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And it’s not working …
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You do not need any zener diodes.
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I breadboarded this, seems to work good until you get to lower frequencies, then yuck.
I tried swapping the transistor buffer for a TL072 buffer like this and got the same results
Quick video of the behavior:
Any ideas? Maybe I need an Output buffer not input?
Edit:adding an output buffer made it worse 
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