Rhodes Chroma VCO

[WeAreAs1 at aol.com]

Hello VCDO fans,

Here is the Fender Rhodes Chroma VCO circuit.  There's more to it than this 
(the PW wavshaping/wavemixing circuit, and the ARP Odyssey-type EX-OR ring 
mod), but this will give you the basic idea.  You could add a couple of trims 
at the CV input for trimming scale and offset, and the 1.87K tempco could 
probably be replaced with a 1K tempco (and a little value juggling).

You can download the XR4151 pdf datasheet at www.exar.com, to better 
understand its inner workings.

Who knows?  Maybe this one will fill the bill for clocking a stable, 
wide-range VCDO. (after changing some of the cap values to smaller ones)

I am curious to find out if any list members have a (working) Rhodes Chroma.  
I have a few questions about it.  Please email me if you do.

Michael Bacich


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