[sdiy] Roland MKS-50 chorus mods

[anthony]

Does anyone know of anyone doing any mods to the true stereo chorus on the 
MKS-50? I've been thinking at least of making a 1U patch/control panel for 
it to be able to control more than the rate.

The thing is the BBD's they're using are MN3009's which are 256-stage BBD's. 
I'd like to try a couple of MN3004's (512-stage) but I don't have any. I 
thought about using MN3007's and using smaller caps for the BBD clocks. This 
seems like a good idea because I can here a faint "squip squip squip" from 
probably the clocks interacting and putting audible difference frequencies 
in the mix. It's not that bad, but it seems logical that using much higher 
clock frequencies should make this problem less pronounced, or have I got it 
backward and this is why they're using such a small BBD? I figured it was 
for the S/N ratio more then anything. This synth is really a great unit so I 
can't really complain, but having the PG300 and maybe my own homebrew row of 
knobs to tweak would make it extra superb.

I'm glad I found the service manual online.

aa