CEM3360 and another OB-8 mod

[gstopp at fibermux.com]

     Hey Juergen,
     
     Is the 3360 control response linear between 0v and 2v? Is it possible 
     to drive the control input with a 0v to 5v control signal, through an 
     input divider of say, 33K/22K? Or does the control input pin have an 
     impedance low enough to warp such a divider's curve? Also the data 
     sheet shows connection for exponential response, and shows the same 0v 
     to 2v range for that. I wonder what the answers to the above questions 
     are in that mode of operation.
     
     Heck I have some 3360's here, maybe I should try it myself....
     
     - Gene
     gstopp at fibermux.com


______________________________ Reply Separator _________________________________
Subject: CEM3360 and another OB-8 mod
Author:  Haible_Juergen#Tel2743 <HJ2743 at denbgm3xm.scnn1.msmgate.m30x.nbg.scn.de>
at ccrelayout
Date:    4/18/96 3:35 PM
     
These "high fidelity" VCAs have one great disadvantage: They have 
extremely unwieldy linear control inputs.

Hey, these 3360's start to conduct at approx.250mV (with a *large* tolerance, 
according to the data sheet!), and they reach their final gain at 2V !! Couldn't
believe it, but it's true. These things have a very good audio quality for sure,
but the linear control input is crap.
     
I think this behaviour would make it very hard to use the 3360 
as a main VCA in a synth voice.
     
JH.