Slowing down VIIB rate

[GernBlanston]

Hi everyone, Just finished the VIIB this morning and it started straight away and works great. My only complaint is that even the slowest rate seems pretty fast. Is there a way to slow this down with a pot change for example? Rate pot is a C250k. Thanks!

Steve

 

[GernBlanston]

Found a solution. I tack soldered a 100n cap across c22 and another across c23 to slow down the LFO. This makes the speed range much more usable IMO. Hope this is helpful to someone going forward.

Steve

 

[moosapotamus]

Just curious, I notice that there is no build documentation for this pedal ( https://www.pedalpcb.com/product/pcb420/ ), and no part values on the PCBs . How did you build it without a BOM or anything?

 

[Bricksnbeatles]

Just curious, I notice that there is no build documentation for this pedal ( https://www.pedalpcb.com/product/pcb420/ ), and no part values on the PCBs . How did you build it without a BOM or anything?

The physical board has the values, while the image is refdes.

 

[GernBlanston]

There's a couple of preliminary PDF files I found here in the forum that have all the important info. It's a pretty straight forward build and a super cool pedal. For my needs I just wanted it to have more slow speeds available. Steve

 

[moosapotamus]

Thanks for the replies. I like the speed mod. Could also make it switchable, hi/low range. Thx!

 

[Robert]

@moosapotamus Wow talk about a name from the past.

Here you go.

https://docs.pedalpcb.com/project/VIIB-PedalPCB-Preliminary.pdf

 

[pricklyrobot]

So then, would lowering the value of C22 & C23 give you faster rates?

 

[pettert]

So then, would lowering the value of C22 & C23 give you faster rates?

Fastest setting sounds rather fast, if the Behringer UV300 reacts the same, but it would be fun to experiment and see.

 

[pricklyrobot]

I’m curious if it could be pushed into FM territory (like when you modulate something with an audio-rate oscillator instead of an LFO) at all.
I’ve got the old BYOC VB-2 clone, which I believe is the same circuit. I might stick some sockets in those two capacitor spots and mess around with it