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Thanks for the info! Meanwhile I have drawn the diode mod into the schematic you can find below, maybe that one tells more (drawn with red). The last version of the PCB has this extra diode added with the exact same modification of the routes. But as mentioned, the first version that I am trying...

Thanks! However, meanwhile I noticed a problem with the PCB I found to be available. It is the PCB for the first version that uses the MN3005 chip, but 2 things do not match. It seems as if those are not an error, but were added for some reason, there is just no info why: 1. There is an extra...

The Amethiyst Delay is a "reiterpretation" of the old pedal so to say. It has a detailed building instructions pdf but that also seem to lack that info. Meanwhile I checked that 1/4 may not fit to be oriented horizontally, but according to photos of the original board, several resistors are...

I want to make a Boss DM-2 on a PCB near to the size of the original. What size of resistors did they build into the original pedal? Was it 1/4W or 1/8W? I want to make sure I won't run out of space before starting to build. Moreover from 1% tolerance resistors I only have 1/2W type, I guess...

I was informed differently from various sources. FET is said to be lacking intermodulation. Anyhow will see. If it doesn't work I will return it to the store.

Well, it seems though, that on the ready made side there seems to be a solution. Interestingly this pedal can go down to as low as 20 microseconds. That can help me out. I will sell my problematic compressors and buy this one. Having a meter is also very useful. What a pity this one is not...

I cannot confirm this is the correct schematic, because I haven't disassembled that pedal yet. I had the photos from another user. But I will definately create the schematic for the Carl Martin Compressor and the Opto Comp, too. I want to see why those two pedals lack intermodulation and why all...

Well, we won't agree about it but these are our personal opinions indeed. I am planning to desolder the stuff with a so called tinsucker, the metal one that can be heated, placed over the pad and remove the tin with a push of a button. But now as you mentioned it, maybe I will have a...

Ahh, thank you very much for the simple and precise description! The only one so far that I understood! :D

I want to copy and modify this pedal to suit my needs, because as it is, it is not very usable. It is a pretty simple build on its own, connection routes are visible, only normal sized components, the compressor is noise and distortion free, so would be a good starting point. But the only...

You didn't get the point: the chip is in my original Carl Martin pedal. So available!!! If the updated fully controllable board is ready, I will not hesitate placing that chip onto that board. The original Carl Martin Compressor is functionally very useless. Will not be missing that. They ruined...

Bingo: https://thatcorp.com/datashts/dn115.pdf

The Carl Martin Compressor offers the solution that you refer to is not possible (the photo of the chip is from that, not the Opto Comp). It does have a fast attack and is distortionfree, but the fact that the Attack and Release has 1 common knob on that compressor makes it unable to do delicate...

Remember what the comment was in connection with the Fast Audio Peak limiter? That the technology is obsolete prone to distortions, and the THAT chip is a much more advanced technology with better noisefloor and distortion specs. Remember I mentioned the Carl Martin Compressor/Limiter is unlike...

Maybe. That is one possible way. But having realized that the Carl Martin has normal, old fashioned PCB and normal sized parts with values written on all, maybe the best approach would be to clone them and correct the weakness about their controls. The Opto Comp is such a simple circuit that...

What I referred to: some may consider a compressor fast, but it must be clarified about which part of the neck we are talking about. At the stem of the neck where the highest notes are, you need to make sure the attack can be set fast enough to catch the fast transients there in time. If you...

Thanks for the clarification on the version, it helps a lot. Another thing that still confuses me is that the version that is uploaded to Muzique seems to lack attack and Release setting. Those would be essential to delicate limiting or compression. To act fast on peaks and release fast when...

Are you writing about this version? https://www.muzique.com/tech/2166.htm Or the one you presented the schematic for is a different version? By the way, I was looking for resuorces to get the SSM2166 chip earlier, and found it has different versions: SSM2166A, SSM2166P, SSM2166SZ, etc...

No because it tells me nothing. I wrote I am a beginner. I can only rely on my empirical experiences.

Someone recommended this compressor for me while discussing about distortion in compressors. As it was described to me, it is doing compression in an uncommon way, as I understood it is raising the noise floor or the low volume section instead, or something like that. It seemed to be interesting...