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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
Problem with VCS Ken STONE/ Bananalogue
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Emalot



Joined: Jul 11, 2011
Posts: 2
Location: Lyon

PostPosted: Wed Mar 12, 2014 9:01 am    Post subject: Problem with VCS Ken STONE/ Bananalogue Reply with quote  Mark this post and the followings unread

Hello everybody,

I finish a second VCS 775 from Elby, and everything is OK except i mesure -15V in the OUT.
When i loop, there is no probleme, the OUT and the Bipolar OUtput are OK, but if i trig like an EG, start to -15V instead of 0V.
It's not exactly -15V, it's -13,43V. I can mesure this -13,43V in the PIN1 of my TL072.
My "INput" doesn't work also. For me it's the same problem but i can't localise it!

I alreay change TL072 and LM3900.
Any idea?

I note a second thing, when i start my module, it's need 1-2 minutes to have a bipolar OUtput. At beginning the Output bipolar is exactly same to the "normal" Output. I note this for my 2 VCS.

I already try to do thread about my problem in Muffwiggler and people tell me to try here.
The link of discussion, because we already try some tricks: http://www.muffwiggler.com/forum/topic-91622.html&highlight=vcs
Thanks for your help.
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Emalot



Joined: Jul 11, 2011
Posts: 2
Location: Lyon

PostPosted: Thu Mar 13, 2014 3:45 am    Post subject: Reply with quote  Mark this post and the followings unread

I change my DECAY POT, some resistors, my TL072.
BUt i didn't find my problem.
LFO mode work perfectly, AD mode do envelope, but from -14V:
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