Smoothing out CE-1 / BBD Chorus modulation

[Bosco Birdswood]

Hi all,

I have a CE-1 that I've resurrected and it's working fine having replaced all electrolytic capacitors.

I'm probably being overly fussy but my one concern or gripe is that the modulation is a little bit binary sounding, only really noticeable when you let a note or chord ring out. Rather than being a nice smooth sine wave LFO it's a little more like a square wave. I actually felt this with the MXR analog chorus from new so it might just be a BBD thing but are there any likely culprits here that I should investigate? This is a very ignorant question but what actually determines the sweep of the modulation on the CE1?

[Vivek]

Do you have an oscilloscope?

The schematic you posted shows waveforms at various locations. Do you see similar waveforms in your circuit ?