[sdiy] Compressor / Limiter Circuit for Spring Reverb?

[mark verbos]

Looks like Langomes is unresponsive. I can’t help noticing the similarity when I put a Urei BL-40 schematic next to it. The “Peak Program Amplifier” which legend says is 1176-ish (sorta I have 2 units here). It’s just the sidechain, in the Urei’s case that’s a dual opamp and a couple NPNs, some passives. 

Mark






> On Apr 3, 2026, at 12:41, Tim Cockram via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> Hi,
> 
> Have you tried Iangomes here https://gearspace.com/board/geekzone/1312463-orban-111b-limiter-module.html  ?
> 
> tc
> 
>  <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>	Virus-free.www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <x-msg://1/#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
> On Thu, 2 Apr 2026 at 15:56, James Coplin <james at ticalun.net <mailto:james at ticalun.net>> wrote:
>> 
>> I have an Orban 111b here that I loved but the proprietary and epoxy potted limiter module is bad and I've given up hope of someone figuring it out or being able to de-pot it. 
>> 
>> So, I was wondering about just putting a different compressor / limiter circuit in there just to have a working spring reverb even if it will no longer be the same. Anyone have suggestions for a stereo compressor / limiter circuit that might suitable? Because it also has impossible to find concentric pots that need replacing I was going to make a new front panel in any case.  
>> 
>> James R Coplin
>> ________________________________________________________
>> This is the Synth-diy mailing list
>> Submit email to: Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>> View archive at: https://synth-diy.org/pipermail/synth-diy/
>> Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
>> Selling or trading? Use marketplace at synth-diy.org <mailto:marketplace at synth-diy.org>
> ________________________________________________________
> This is the Synth-diy mailing list
> Submit email to: Synth-diy at synth-diy.org
> View archive at: https://synth-diy.org/pipermail/synth-diy/
> Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20260403/d649280f/attachment.htm>