duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #161 on: October 09, 2019, 12:13:30 PM »
do you have the standoff lengths for the meter board by chance?
Good question. Anyone know of standoff measurements for the meter board?

Ricardus

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #162 on: October 09, 2019, 04:04:24 PM »
Since I've been building SSL preamps, and I'm involved in an SSL channel EQ project, I was wondering if anyone had done the channel dynamics module. So I guess here is my answer!
Audio mastering for hire..

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #163 on: October 12, 2019, 03:17:38 PM »
Anyone have tips for assembling  the ribbon cable connectors?  When I pressed mine together the female connectors exploded. I have more on order.

Ilya

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #164 on: October 12, 2019, 03:39:39 PM »
The trick here is to apply even pressure. You can do it with the vice. Also, there's a special instrument, not that expensive, but for on-offs it's not worth it.
PCBs, enclosures and build guides at www.rackneve.com

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #165 on: October 12, 2019, 06:38:53 PM »
Thanks. I ordered 8 more. Hopefully that’s enough to get it right!

Ricardus

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #166 on: October 12, 2019, 07:12:54 PM »
Anyone have tips for assembling  the ribbon cable connectors?  When I pressed mine together the female connectors exploded. I have more on order.

I messed one up when I tried to make one by hand not long ago. I'll be getting the crimper one of these days.
Audio mastering for hire..

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #167 on: October 24, 2019, 09:42:29 PM »
Vice did the trick on the ribbon connectors. Almost ready to calibrate. Need to pick up some meter leds and it’s calibration time

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #168 on: October 25, 2019, 03:53:32 PM »
Well it looks like my stand-off measurements won’t work. The ribbon cable connectors are too close. It appears the the standoffs for the main pcb need to be real short! I tried 5/16” and it looks like it needs to be almost 1/2 that.
Edit, it looks like 1/8" on the bottom and 1" between the main board and the meter board.
« Last Edit: October 26, 2019, 03:44:07 PM by duantro »

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #169 on: October 28, 2019, 03:26:35 PM »
I have one of my units working and calibrated, the second one passes audio but can't calibrate compression to register anything on the meter or audibly. Also the gate seems to be registering on the meter, but can't hear anything happening. I did have CPS1 (220uf) cap in backwards that wasn't happy. I replaced that and seem to be getting proper voltages on sockets. Any thoughts on where to check? maybe I'll see if I have any extra 78L05's around and swap those.
« Last Edit: October 28, 2019, 03:30:28 PM by duantro »


12afael

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #170 on: October 29, 2019, 05:47:41 AM »
It happen to me something similar. One of the diodes was backwards on one of the precision rectifiers. It can be many things really but that was in my unit.
heavy metal is the law!!!

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #171 on: November 02, 2019, 01:01:15 PM »
I found a bad solder on the relay, signal at last! Time to calibrate
Compressor calibrated, but it looks like gate threshold/vr3  isn't doing anything. Time for more searching...
« Last Edit: November 02, 2019, 07:08:12 PM by duantro »

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #172 on: November 06, 2019, 07:14:22 PM »
OK, I've found some differences in some voltages. Attachment has my voltages of the working unit in blue, and the one that doesn't open up the gate in red. Can anyone see what is shorting the voltages?
Where does the -5 vdc  come from at r41?
« Last Edit: November 07, 2019, 12:41:08 AM by duantro »

12afael

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #173 on: November 07, 2019, 06:45:37 AM »
What voltage do you have at the set gate pot? Does it change??
heavy metal is the law!!!

duantro

Re: SSL 4K channel dynamics. (And more in future). PCB's/kits: Available!
« Reply #174 on: November 07, 2019, 09:58:22 AM »
What voltage do you have at the set gate pot? Does it change??
Thanks for the reply! R31 has 15.41vdc on trimmer side, the same as the working one. And 0vdc on the other side. I took most all voltages and only posted the ones that differ from the working one.


 

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