# 1181 dual vca module **URL:** \ **Category:** KOSMO MODULES\ **Created:** [March 27, 2020, 2:35pm UTC](https://lookmumnocomputer.discourse.group/t/1181-dual-vca-module/456 "2020-03-27T14:35:28Z")\ **Posts on this page:** 1\ **Showing post:** 16
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [May 5, 2023, 4:56pm UTC](https://lookmumnocomputer.discourse.group/t/1181-dual-vca-module/456/16 "2023-05-05T16:56:46Z")
You can probably just leave the Zener diodes out. At least in the first run they were connected to the wrong place (signal instead of CV), and they don’t really do much of anything in the right place. This is from the discussion of the 1184 but it’s the same issue: > [@1184 quad mixer vca (AKA 1183)](https://lookmumnocomputer.discourse.group/t/1184-quad-mixer-vca-aka-1183/455/39): > > yeah the zener diode I have updated this on new ones I need to update the documentation I did it last week. its completely pointless. initially I had it on the cv input, it took this long for me and a friend to realise it wasn’t on the cv input and on the signal input. proper nelson Mandela effect. and since its not needed on the cv input as it stands. been working perfectly fine you can ditch it. however it may explain my wonky signal which im not gunna complain about a bit of character, that … The BOM calls for a BZX55C2V0 which is a 2.0 V Zener, the Tayda one you show is a 2.4 V so isn’t equivalent. --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/1181-dual-vca-module/456)._