zamproject
Well-known member
- Joined
- May 11, 2010
- Messages
- 1,630
Hey
After long cleaning, recap and fix on a studer desk, i'm on the way to start the modification i want.
The first big step is to add input modules on empty space.
The desk (modular 5x8 frame slot) is loaded with 18 mono and 4 stereo aux return that mean 26 out to bus.
The goal is to add 6 stereo input, for a total of 38 ch
Of course i have to test and check all this regarding noise etc (reading history about this console talk about first 32ch board)
The point is i'm little lost about the summing right now. The resistor to bus are 3K3 BUT in my actual desk (Yes i have 2 studer 289 :-X ) the resistor to bus are 2k2 for tot 28ch (close to the same setup???)
As i want to use some channel from this desk i have to match resistor, but I have absolutely no idea if i have to go for 3k3 in the added ones or 2K2 in the original ones.
For what i understand from search here, it's an ACN summing but with a transformer. Studer call this 0 ohm summing, manual say input impedance <2 ohm
bus board come from the left, pin 17 & 18
R232 // r233 give me 2k22, any link with the 2K2 from channel to bus?
Regarding this schematic what you guys think about optimal // input resistance
first console 28x 2200 -->78ohm
second 26x3300 -->127ohm
if i put 38ch with 3k3 i get 87ohm, and 58ohm for 2k2.
Zam
After long cleaning, recap and fix on a studer desk, i'm on the way to start the modification i want.
The first big step is to add input modules on empty space.
The desk (modular 5x8 frame slot) is loaded with 18 mono and 4 stereo aux return that mean 26 out to bus.
The goal is to add 6 stereo input, for a total of 38 ch
Of course i have to test and check all this regarding noise etc (reading history about this console talk about first 32ch board)
The point is i'm little lost about the summing right now. The resistor to bus are 3K3 BUT in my actual desk (Yes i have 2 studer 289 :-X ) the resistor to bus are 2k2 for tot 28ch (close to the same setup???)
As i want to use some channel from this desk i have to match resistor, but I have absolutely no idea if i have to go for 3k3 in the added ones or 2K2 in the original ones.
For what i understand from search here, it's an ACN summing but with a transformer. Studer call this 0 ohm summing, manual say input impedance <2 ohm
bus board come from the left, pin 17 & 18
R232 // r233 give me 2k22, any link with the 2K2 from channel to bus?
Regarding this schematic what you guys think about optimal // input resistance
first console 28x 2200 -->78ohm
second 26x3300 -->127ohm
if i put 38ch with 3k3 i get 87ohm, and 58ohm for 2k2.
Zam
