[sdiy] Can I use an LM13600 in place of an LM13700 ?

[WeAreAs1 at aol.com]

In a message dated 9/4/01 9:40:42 PM, harrybissell at prodigy.net writes:

<< I agree (JH) with your assessment if the OTA is used in an
log portamento. Maybe a Vactrol would be a good choice there. >>

Yeah -

The old Oberheim Four-Voice used four vactrols to do log portamento (one for 
each voice channel).  The Four-voice portamento sounded great!  They used the 
Vactec 5C3 vactrol, but you could use one of the currently-available ones 
from Clairex.  The Four-voice keyboard schematics are available at the 
Synthfool pages at Sonicstate 
(http://www.sonicstate.com/synthfool/schm.html).   Look for "Oberheim 4 voice 
keyboard scanning diagrams:  1, 2 , 3, 4, 5 "  The portamento parts are on 
drawing numbers 4 and 5.

Michael Bacich