Core Capacitor Substitution Question

Testing/Troubleshooting
1

So my new Midibox CV is booting up fine, but my DIN buttons aren’t working yet…

After double checking all my wiring, I realized that the 33pf caps connecting each end of the crystal on my core board were missing. 

How crucial is this value?  I don’t have any 33pf caps, but I have some 47pf caps, will those work too?  Just don’t want to make an order for the 33pfs if I don’t have to.

Thanks,

Lars

2

Hi Lars,

probably the oscillator won’t start with higher cap values, it’s better to use lower values like 22 or 15 pF

Best Regards, Thorsten.

3

Cool, thanks!

This is all working now.  New MBCV pics coming this week.