Stupid SSL Mixbuzz question

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Igor

Well-known member
Joined
Jul 17, 2006
Messages
2,193
Location
Israel
Hello to all!
I just curious.
Went into calculations...
As I know, dbx202c control port impedance is around 600R
and they have controll voltage constant of 20db/1v.
If refer to original SSL schem, posted on Jacob's website,
82e26 and 82e27, there's 4k7 resistors in series to control
ports of VCA's.
On GSSL, we actually have 2k1:120r to get 6.1 mv/db.
This messed up my thoughts!!! ;)))
I missed something there.
The question is:
How many volts to get 10 or 20 db of compression
in original SSL compressor there's
at the output of T1 opamp (lf351-right after time const. capacitor) referring to 82e27????
Thanx!
 
Are you familiar with the different versions of VCAs?

Some of them require 50mV/dB compression and some require 6mV/dB compression.

So if your calculation is 6.1mV/dB, then I would guess it was assumed to have 6mV/dB type VCA.

This is a good document that talks about the different versions and control voltages.
http://www.thatcorp.com/datashts/dn127.pdf
 
Hi Greg, I know all this stuff.
Guess, where the question came from? ;))
My purpose is is to get adequate and close as possible to original
SSL mixbuzz behavior.
And.....
PEOPLE!!!!!
Anyone can answer to this question??????

How many volts to get 10 or 20 db of compression
in original SSL compressor there's
at the output of T1 opamp (lf351-right after time const. capacitor) referring to 82e27????
 

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