From yahoo Sent Tue, Apr 9th 2019, 11:31
Hello, V2 is an older version from 2010. Due to tolerances of the V2164D sometimes the VCA does not close with CV=0. To avoid this a high value resistor (e.g. 4M7) has to be added between pin 4 (upper VCA) or pin 5 (lower VCA) of the V2164 and -12V. This adds a small negative voltage to the CV summing node. -12V is available e.g. at pin 9 of the V2164 or the wire bridge "J1" below the V2164. In V3 and V4 of the module the 4M7 resistors have been added. Hope this helps Dieter Doepfer > Hello all. > > > I’ve just noticed an unusual behaviour on my A132-3 Dual VCA > > > With no gain and 0 cv the bottom channel is letting bleed through. > > > It seems to be on linear mode only, and it is easily audible. Top > channel is fine. > > > Looking at the pcb my module is a v2 revision with two TL074CN > IC’s and and one V2146D IC. > > > https://www.dropbox.com/s/0kgmlmhitb21ix8/A132-3.JPEG?dl=0 > > > If anyone can advise it would be really helpful as I need to use > the module to gate two channels of samples at a theatre event > soon. The sample material suits a linear response, so I really > need both channels to open and close at a similar rate, and to > close to silence! > > > Many thanks, > > > Neal > > > BTW It’s a small LC1 rack, though I’ve tried it in my LC 3 and > LC 6. I’m also using a recently purchased Doepfer A140-2 which I > completely love. It pairs with the A132-3 really well and is so > compact and useful, especially for stereo signals and twin > voices. Would recommend it to anyone wanting to save HP. > > > > > > ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Doepfer_a100/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Doepfer_a100/join (Yahoo! ID required) <*> To change settings via email: xxxxxxx_xxxx-xxxxxx@xxxxxxxxxxx.xxx xxxxxxx_xxxx-xxxxxxxxxxxx@xxxxxxxxxxx.xxx <*> To unsubscribe from this group, send an email to: xxxxxxx_xxxx-xxxxxxxxxxx@xxxxxxxxxxx.xxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/