I'm working on a 16 channel compressor/limiter but I forgot to write down the values of the trimpots and the potentiometers of the distressor when opening it. Is there anyone who can help me with that? Board is in the design fase of testing the physical dimensions of the components.
1176 style opamp Compressor with limiter distortion
- Thread starter tommia
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Hmm, I don’t think a lack of activity on the thread is a sign of a lack of interest. But since the commercial unit you’ve referenced in a couple posts as the basis of this project is still in production, folks may be hesitant to engage. Cloning current production gear is generally considered somewhat bad form. You said it’s a 16-channel unit, so I’d assume it’s not a straight clone, but the thread lacks any further explanation of what this is (perhaps another reason there hasn’t been much activity). Maybe you could tell us a bit more about what you’ve done?
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Definitely interest, but without any information it's impossible to help you, like i told you before
dreamix
Well-known member
Im a bit confused, it says 1176 style comp, and then distressor based, what is this unit? 16 channels with one and the same comp design on each or different compressors ?
A distressor is an 1176 but with opamps, critcal components are just copy paste. Input and output transformers are replaced with textbook opamp circuits, nothing fancy there. The distortion thing is a wrong calibrated 1176, fet circuit is exactly the same. Instead of fancy switches some standard logic is used. Who is talking about cloning?
I need the values of trimmers of a distressor, all is written on the pcb in there, no schematic is needed for that. Also all experience on pcb manufacturing companies are welcome. I need double sided pcb, half the size of a 19 inch unit. Design is done in Kicad.
The idea is a 16 channel unit with very soft knee compressor max 5 db of gain reduction, the goal is more 3 db. And an instant limiter. Almost no controls. A set and forget unit that adds a vintage vibe with a wink at a multitape recorder.
I need the values of trimmers of a distressor, all is written on the pcb in there, no schematic is needed for that. Also all experience on pcb manufacturing companies are welcome. I need double sided pcb, half the size of a 19 inch unit. Design is done in Kicad.
The idea is a 16 channel unit with very soft knee compressor max 5 db of gain reduction, the goal is more 3 db. And an instant limiter. Almost no controls. A set and forget unit that adds a vintage vibe with a wink at a multitape recorder.
MidnightArrakis
Well-known member
Well.....I am able to offer you this PCB fabrication service that is based over there somewhere in Europe:
https://www.elektorpcbservice.com
As others have already noted, yer gonna need either the schematics of whatever it is that you are building or yer gonna need an actual unit to open up and make some measurements on whatever it is that you need to know. Other than that, you're guessing!!!
As someone who has designed their share of electronic equipment, including -- BOTH -- the mechanical and PCB designs of such, should you wish to share with me your KiCAD schematic and PCB files, I will take the time to review both sets of data and see if there are any obvious and even "somewhat subtle" errors within your data files. And, just as a "reference".....I have had PCB's that were fabricated in quantities up to 50,000 units and sold nationwide (here in the U.S.) in several major retail stores. Since then, most of my mechanical and PCB-designs have been for more "industrial" products, while another large number have been for specific designs of "covert intelligence-gathering, surveillance and/or tracking operations" devices/equipment/gadgets including projects for the CIA, FBI, NASA, NRO and The Department of Homeland Security!!! See attached PDF files.
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Michael Tibes
Well-known member
So that is kindof a new design from a functional perspective. I do find it quite interesting, but some more information would certainly spark my curiosity further ;-)
Michael
If there is more interest I could offer the boards here. As it will be some kind of insert on my console, in and output will be unbalanced jacks. Think of an gentle "wrong" allined 1176 build with opamps. Attack, release, threshold, ratio and gain, will be fixed but there is place on the pcb for trimmers or connectors if you want complete control. You can experiment with different soft knees. I'm still thinking of some preamphasis as this is also part of how tape behaves. But the main goal is the fet sound and the limiter function. There will be one switch to choose between 3 modes (16 channels) and a switch to hard bypass all 16 channels. This can also be done on each channel separately if you like. Prototyping is done on breadboard. It is time to send the gerberfile out. As I have no experience in this, I'm a little bit stuck. In the old days I made them myself or it was done in the electronic shop or in the university.
Hi, sorry to contact you like this but im new member and couldn't find private message function..
-I saw that you said you have Haufe 1:1 line input transformers to sell, please contact me about details, i would be in a need for a pair.
Thank you!
-I saw that you said you have Haufe 1:1 line input transformers to sell, please contact me about details, i would be in a need for a pair.
Thank you!
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