[sdiy] Re: Korg MS-50 filter/ CA3019

[Joachim]

Hello,

sorry, for warming up old topics.

I was searching for infos about the CA3019 and found
the following list mails in the list archives.

Has anyone in the mean time build a Korg MS-50 filter clone
without the CA3019?

Best regards,
Joachim Backhaus

Here are the mails:

http://elists.resynthesize.com/synth-diy/1999/02/769057/

"From: Haible Juergen ( [EMAIL REMOVED] )
Date: Feb 26, 1999
Subject: AW: MK-50 filter / CA3019

	> Yes, but do they all really need to be matched, or only the 4 ones
in ring?

I'd say they have to be matched in pairs: The two left ones of the 
ring, the
two
right ones of the ring, and the two that connect the ring to the opamps.
So you are right, it would probably work with two arrays, one for the 
ring
and one
for the remaining two diodes.

JH."

http://elists.resynthesize.com/synth-diy/1999/02/769029/

"From: Harry Bissell ( [EMAIL REMOVED] )
Date: Feb 25, 1999
Subject: MK-50 filter / CA3019

I may be off here, but it seems that you could use four of the 
transistors
from an LM or CA3046 array connected as diodes. I just recently saw an 
app
note on the benefits of which junctions or configurations are better for
certain parameters...  Was it in a recent issue of Electronic Design, 
or EDN
magazine? Please advise....   Harry Bissell"