GSSL SuperSC board

[kosty]

I know the external SC Output and Input are unbalanced. Is it theoretically possible to make them balanced by having a custom PCB with the same input and output stage as the GSSL Board for balancing / de-balancing ?

 

[ding]

Another thread I am reviving 

I set up my gssl with a switchable turbo mode and a single super sidechain mode. I used the diagram here on reply #4
http://groupdiy.com/index.php?topic=36643.0 It sounds great but I have one small problem with the superSC. I set up a drum buss and I added a 100Hz low pass filter @ 48db and I am getting strange readings when switching the sidechain.

Off = -16db compression
60 = -8db compression
90 = -12db compression
130 = -15db compression
200 = -6db compression

I check all the connections from the lorlin switch and they are correct but they seem to be out of order. Does this seem correct? Maybe I should test it with a 100Hz tone instead of a drum kit but still it doesnt make sense to me. Any ideas/thoughts?

EDIT:
40Hz Sine
Off = -12db compression
60 = -4db compression
90 = -6db compression
130 = -12db compression
200 = -4db compression

100Hz Sine
Off = -12db compression
60 = -7db compression
90 = -10db compression
130 = -12db compression
200 = -7db compression

Edit: Fixed routing and updated numbers (Ratio @ 4:1, Attack @ 3, Release @ .6)

 

[ding]

Can anyone with a single super sidechain run a 100Hz sine wave, set the compression to 4:1, attack and release at 12 o'clock, and compression at -12 db with the sidechain off and tell me what compression you get from the other settings?

 

[ding]

Had forgot to modify the Lorlin switch from a 4 pole to a 1 pole. Now everything is peachy.

 

[G-Sun]

200r realy:
Is this right
http://no.farnell.com/omron-electronic-components/g5v-2-24dc/relay-pcb-dpdt-24vdc-2a/dp/9949500
?

 

[Harpo]

200r realy:
Is this right
http://no.farnell.com/omron-electronic-components/g5v-2-24dc/relay-pcb-dpdt-24vdc-2a/dp/9949500
?

..is a 24VDC standard type relais with 1152R coil resistance (Omron has a high sensivity type as well).

You probably/maybe want http://no.farnell.com/multicomp/hrs2h-s-dc24v/relay-dpdt-2a-24vdc-tht/dp/9480226
a nominal 24VDC DPDT high sensivity relais with 2880R coil resistance (less than half the current demand of your linked omron relay and with the additional benefit of only 2/3rd the cost).
A 200R relay was never asked for (that was 200mW for the high sensivity type). This 200R in question is simply a voltage dropping resistor in series to a (ment for a different 800R coil resistance) 24VDC relay coil to operate at a +/-15V (=30VDC differential) supply voltage. For this high sensivity 2880R coil resistance, the voltage dropping resistor needed would be 720R. These relay coils can operate at a quite wide range, for usual from 75% up to 120% of nominal coil voltage, but an only 200R voltage dropping resistor will have the relay coil operating close to the 120% edge.

 

[G-Sun]

You probably/maybe want http://no.farnell.com/multicomp/hrs2h-s-dc24v/relay-dpdt-2a-24vdc-tht/dp/9480226
a nominal 24VDC DPDT high sensivity relais with 2880R coil resistance (less than half the current demand of your linked omron relay and with the additional benefit of only 2/3rd the cost).

Thanks a lot!
Relays are a little new to me.
So, I buy this and a 720r resistor.
And the resistor.. I put between the 3 diodes where it's marked 200r?
https://pcbgrinder.com/download/SSCdocuments.pdf
?

 

[G-Sun]

From BOM
https://pcbgrinder.com/download/SSCBOM.jpg

2 x 1k2 meter illumination: What's this?
I bought this DC-meter
https://pcbgrinder.com/index.php?route=product/product&path=94_95&product_id=101
Do I need a separate led for it?

and
2k2 in led: I don't understand 2k2 for leds.
What's this?
Edit: https://pcbgrinder.com/forum/viewtopic.php?f=3&t=33&p=88#p87

 

[mike76]

I just startend to wire the SSC board from Gustav. In the right side of the 2nd IC is a Link marked. It looks different than the links in the gssl Main PCB. Do I have to  connect it? Thanks.

 

[mike76]

If someone has the same question: is has to be soldered

 

[febo2609]

Is anybody have a PCB layout for this GSSL SuperSC board.All link on this threat for pcb layout are dead.

 

[sonicwarrior]

Do you mean this one? => http://sdiy.de/de/projects/superSC.html

What format do you need? I redrew it with Sprint Layout.

 

[febo2609]

PDF wil be ok.
best regards

 

[ilfungo]

Hi
My new gssl is ok!
I want to add turbo board but i want to buil pcb and not buy it...
Where i can find schematics of turbo pcb?
Thanks!!!

 

[sonicwarrior]

PDF wil be ok.

Have to check that on an older computer. Mine is running with Linux and Sprint Layout didn't seem to like Wine the last time I tried.

Where i can find schematics of turbo pcb?

The turbo board is a completely different thing. It is basically just a clone of the sideboard circuit already in the GSSL so with it the GSSL uses a stereo sideboard path and without it mixes stereo down to mono.
See this thread: https://groupdiy.com/index.php?topic=59475.msg755361#msg755361

 

[sonicwarrior]

I couldn't export to PDF. Just image files (jpg, gif) or Gerber.

Attached is the gif of the solder side.

 

[febo2609]

Can you upload gerber file?

 

[sonicwarrior]

You have to rename the file from *.pdf to *.gbr as strangely I can't upload *.gbr files here.

 

[febo2609]

Hi,
thanx for pcb lay out but it is a problem.When I open a gbr  file with  CADCAM profesional program I got seperate a pads from traks.
Pcb pad are not connected with routed net,there are 1mm open space.

Hapy new year.

 

[sonicwarrior]

In GerbView from KiCad I don't see any such problems. Might be your program that's doing this.