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 Forum index » Instruments and Equipment » Modular Synthesis
Has anyone ever experienced this?
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druish



Joined: Jun 23, 2009
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Location: New Paltz NY
PostPosted: Thu Jan 14, 2010 8:26 pm    Post subject: Has anyone ever experienced this? Reply with quote  Mark this post and the followings unread
The only thing plugged into my amp is the VCA with nothing patched anywhere and I can hear my VCO through the speakers. Anyone? Confused
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blue hell
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PostPosted: Fri Jan 15, 2010 3:52 am    Post subject: Reply with quote  Mark this post and the followings unread
Some bleed through, such happens ... can be hard to find ... is it bad enough to want to go to the bottom?
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druish



Joined: Jun 23, 2009
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Location: New Paltz NY
PostPosted: Fri Jan 15, 2010 8:42 am    Post subject: Reply with quote  Mark this post and the followings unread
well it isn't terrible. But how does the VCO bleed through to the VCA if it isn't even connected to it? The only "connection" the VCO and VCA have in common is that they are powered by the same supply.
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EdisonRex
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PostPosted: Fri Jan 15, 2010 4:24 pm    Post subject: Reply with quote  Mark this post and the followings unread
druish wrote:
well it isn't terrible. But how does the VCO bleed through to the VCA if it isn't even connected to it? The only "connection" the VCO and VCA have in common is that they are powered by the same supply.


And that could very well be your problem, especially if it's weak power, or wired unoptimally. This is why a lot of folks use big caps and distribution boards. How are these wired, and what powers them?
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druish



Joined: Jun 23, 2009
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Location: New Paltz NY
PostPosted: Fri Jan 15, 2010 11:40 pm    Post subject: Reply with quote  Mark this post and the followings unread
I figured. Its just a test rig. Using a 337T/317T home-brew PS with a distribution board. I actually moved the VCO power connector away from the VCA's and the problem lessened.
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blue hell
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PostPosted: Sat Jan 16, 2010 6:12 am    Post subject: Reply with quote  Mark this post and the followings unread
You could try to put some inductors into the power lines of the VCO, the pig nose like bead thingies I mean.
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druish



Joined: Jun 23, 2009
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PostPosted: Sat Jan 16, 2010 8:06 am    Post subject: Reply with quote  Mark this post and the followings unread
Thanks, I'll give it a try.
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