New 'ultimate' SSL buss comp clone ;-)

[Rob Flinn]

[quote author="Rob Flinn"]
You can't JUST link the Switch PCB's 12v - you'd have NO Power. I have a perfectly working unit at this point & those pics I posted are exactly how I did it.

Kevin

The power is on the master switch board anyway if you have connected the master main & switch pcb's as normal. I just connected from the back of the main switch pcb to the slave switch pcb, mainly because I too lazy to unbolt the main board again !

I was looking at the pics Keiths version & it looks like he does have these connections since there seems to be a pair of green wires that look like they are coonected to the 12v pins on the slave switch pcb, although the res isn't too high to be sure.

 

[khstudio]

The power is on the master switch board anyway if you have connected the master main & switch pcb's as normal.

Right... that's what my hook-up pic shows...NO?

Hey man... Keith sent me the LARGE pic of his, shown on the first page... PM me your email address & I'll send it over so you can zoom in.

Kevin

 

[timmygrimm]

[quote author="khstudio"]

No. They are Pre-built version made by DBX. You don't HAVE to use them to have a great sounding compressor with the new 218x series VCA's available.
Get some pre-trimmed 2180 A or B's and you'll be happy.

Kevin[/quote]

Thanks for the info... also, I notice that you have a switch ready for a high-pass filter (steffen-style?)... Do you have a plan on how you'd wire that up to the new dual-sidechain design? I've almost finished a standard GSSL and am thinking about "upgrading" and wondering if I can use the HPF sidechain boards I already ordered!

Tim

 

[Rob Flinn]

[quote author="khstudio"]

The power is on the master switch board anyway if you have connected the master main & switch pcb's as normal.

Right... that's what my hook-up pic shows...NO?
Kevin[/quote]

I'm not really sure what point you are trying to make here ? Mine works & so does yours !

 

[khstudio]

[quote author="timmygrimm"][quote author="khstudio"]

No. They are Pre-built version made by DBX. You don't HAVE to use them to have a great sounding compressor with the new 218x series VCA's available.
Get some pre-trimmed 2180 A or B's and you'll be happy.

Kevin[/quote]

Thanks for the info... also, I notice that you have a switch ready for a high-pass filter (steffen-style?)... Do you have a plan on how you'd wire that up to the new dual-sidechain design? I've almost finished a standard GSSL and am thinking about "upgrading" and wondering if I can use the HPF sidechain boards I already ordered!

Tim[/quote]

I spoke with Greg a few days ago about the sidechain boards & #1, he's going to do another run of the boards (since they're gone)

#2, the summing that happens ON the sidechain board (instead of with the 47k resistors) so a few small changes need to happen to have it work correctly. Greg will be posting the info on how to use his sidechain boards one this version... sometime soon. I will try to add it after I see what he says but YES, I have it ready to go (on ny faceplate) & left enough room for 2x sidechain boards.

Kevin

 

[khstudio]

[quote author="Rob Flinn"][quote author="khstudio"]

The power is on the master switch board anyway if you have connected the master main & switch pcb's as normal.

Right... that's what my hook-up pic shows...NO?
Kevin[/quote]

I'm not really sure what point you are trying to make here ? Mine works & so does yours ![/quote]

Rob,
Maybe I'm mis-understanding you but after I posted the pics I felt you were questioning me or just not understanding what I was saying... so this whole time I've been trying to explain myself :?

I mean no harm & just want to speak (Type) clearly so there is NO confussion. This will save others the BS I went thru when I started mine.
Hopfully that clears things up so we can move on. :green:

Do you need the LARGE pic of Keiths guts???

Kevin

 

[SSLtech]

[quote author="khstudio"]Do you need the LARGE pic of Keiths guts???[/quote]
Hey now...

nobody's slicing ME open!!! :shock:

keef

 

[khstudio]

:razz: I knew that would happen... see how words "can" be confusing.

Kevin

 

[Sleeper]

I've been looking at the sidechain thing.
http://www.groupdiy.com/index.php?topic=12024&highlight=ssl+sidechain

Hmmm. The summing thing is a bit tricky though.

First thought was 2 sidechain boards controlled by one switch.
the sidechain board specs a 2p6t switch but just uses one of the poles, so combined control would be easy.

We have 2 problems to solve right.
I'm just going to put them here so it's easier to think straight.

Omit 1 of the 47K side chain mix resistors on each board.

and

To have the option of Gyraf style detection lift one leg of the 47K resistor on the slave main pcb, on the side that feeds the 100pF capacitor and pin 1 of the side chain VCA. Connect it with a piece of wire to the pole of a spdt switch. Connect one throw of the switch to feed the slave side chain (where you lifted the 47K from), which is Oxford mode. Solder the other throw of the switch to the summing point on the master main pcb (the hole next to the 47K summing resistor where it feeds the detector). This is Gyraf mode.

thinking.

 

[radiance]

[quote author="radiance"]
EDIT: ...ah, it already makes sense. I think this is doable with a DAW (for generating the 1kHz sine wave) and some kind of Berhinger Ultra Curve thingy (for the notch filters). Either way, I'll give it a try.....[/quote]

Aahh bummer, just when I want to set this distortion meter thing up I discovered that the display of the Ultra Curve broke down. Mind you, this is my second unit, the first one broke down within half a year.

 

[Sleeper]

ok, so I haven't really been thinking about this just yet...
If I try and figure something out and then have to wait 2 weeks laterto try it it just never seems to work.


still waiting for some caps to finish up the ssl boards...
2 sidechain boards are done and
2 thrust boards are getting stuffed today since I'm waiting for parts.
Just thought I'd bump this in case someone already has it solved.

If not, will be at it soon.

 

[Sleeper]

OK, I think I got the hookup for the sidechain filter boards.
Gonna try this out as soon as possible.
Meanwhile, if somebody can check for errors that would be great.

Kelly

 

[Rob Flinn]

Kelly

Your diagram needs to be slightly higher res to read it properly. either that or I need glasses !!

 

[nielsk]

I have been wanting to build a small board for this, to save the cost & space of buying another complete set. All it needs on it is the key in opamps and the single vca circuit......Anyone else interested?

 

[radiance]

[quote author="nielsk"]I have been wanting to build a small board for this, to save the cost & space of buying another complete set. All it needs on it is the key in opamps and the single vca circuit......Anyone else interested?[/quote]

Sure ......can't have enough of them PCB's layin' arount

 

[Sleeper]

Thanks Perusha
Kelly

 

[Purusha]

800 x 600 pix
or
1024 x 960 pix

 

[Sleeper]

Wanted to bump this before the weekend when I'll get some time to do final assembly. Hope someone can have a peek at the sidechain hookup diagram and let me know if there are any obvious or not so obvious errors.
Kelly

 

[khstudio]

I'll tell ya, this version of this comp is the **** :thumb:

I'm getting ready to add it to my patchbay but would like to be able to use it Balanced & UN-Balanced...

What's the best way to hook up this compressor UN-BALANCED :?:

I assume that (on the input) pin 3 can be shorted to ground but what about the OUTPUT? - Should pin 3 be grounded or lifted?

Thanks,
Kevin

 

[Purusha]

Just curious. Is anyone planning to gather all the info and suggestions for Oxford MOD and put it
somewhere on the web so we don't have to go through all the pages to grasp the hook up procedure?

It would be a nice help for all of us who are about to build it in the near future :thumb: