etheory
Well-known member
Hi all!
This is purely an academic exercise, but I'm sure that someone should be able to help me out here.
With reference to the schematic available here for the Chilton C30 Compressor: https://www.gearslutz.com/board/attachments/geekslutz-forum/348919d1370939176-chilton-c25-compressor-schematic-chilton-c30-compressor-sch.jpg
Does anyone know what the actual value of resistor R59 is? It looks like it's either 4.7K or 8.7K but it's extremely unclear.
What about R50? It looks like 33K but it could also plausibly by 33R or something else entirely.
Also the portion of the side-chain starting around Z5b is completely nonsensical and I think there must be an issue with the schematic. Without negative feedback, Z5b becomes a comparator, and as a comparator, it is really only on or off. If this is the case, the attack portion of the side-chain is like a sledge-hammer, which simply cannot be the case in the real device.
Can anyone with an actual device please clarify what the actual device looks like in this area?
My guess is that some feedback resistors around Z5b were missed from the schematic.
Thanks!
Sometimes when I see something like this, I just have to understand it, which normally means creating a simulation for the entire circuit, but also often ends up with me finding curious issues that I'd really like to resolve just so I know how things really work.
Any help would be appreciated, but especially from someone with the actual compressor. Even better would be a clearer copy of the schematic, or any corrections from people who have worked on these devices.
This is purely an academic exercise, but I'm sure that someone should be able to help me out here.
With reference to the schematic available here for the Chilton C30 Compressor: https://www.gearslutz.com/board/attachments/geekslutz-forum/348919d1370939176-chilton-c25-compressor-schematic-chilton-c30-compressor-sch.jpg
Does anyone know what the actual value of resistor R59 is? It looks like it's either 4.7K or 8.7K but it's extremely unclear.
What about R50? It looks like 33K but it could also plausibly by 33R or something else entirely.
Also the portion of the side-chain starting around Z5b is completely nonsensical and I think there must be an issue with the schematic. Without negative feedback, Z5b becomes a comparator, and as a comparator, it is really only on or off. If this is the case, the attack portion of the side-chain is like a sledge-hammer, which simply cannot be the case in the real device.
Can anyone with an actual device please clarify what the actual device looks like in this area?
My guess is that some feedback resistors around Z5b were missed from the schematic.
Thanks!
Sometimes when I see something like this, I just have to understand it, which normally means creating a simulation for the entire circuit, but also often ends up with me finding curious issues that I'd really like to resolve just so I know how things really work.
Any help would be appreciated, but especially from someone with the actual compressor. Even better would be a clearer copy of the schematic, or any corrections from people who have worked on these devices.