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 Forum index » DIY Hardware and Software » Thomas Henry designs
MPS ring mod bleed through problem
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druish



Joined: Jun 23, 2009
Posts: 91
Location: New Paltz NY

PostPosted: Tue Nov 16, 2010 8:11 pm    Post subject: MPS ring mod bleed through problem Reply with quote  Mark this post and the followings unread

Having huge troubleshooting issue trying to eliminate audio bleed through from the ring mod section. Star grounded, separated wires etc. nothing seems to completely eliminate it. Its weird, I'm getting bleed through to all the mixer pots, only turning them all down halfway seems to make it slightly less audible but still very annoying. Anybody have or had this issue? any help would be much appreciated.
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fabreeze



Joined: Mar 13, 2006
Posts: 9
Location: Olympia, WA

PostPosted: Wed Jan 30, 2013 8:48 pm    Post subject: ring bleed Reply with quote  Mark this post and the followings unread

I can't believe nobody has responded to this yet.
I have the same problem. As I have with other ring mods.
This one, however, bleeds EVERYWHERE!
The bleed comes from the oscillator made from IC3a.
At first I thought it was just bleeding through to the VCA made from IC3b,
but then I inserted cables into the 3 mixer input jacks, which disconnects the input signals for everything in the main output mixer.
The SYNTH out still has bleed from the ring mod oscillator even though no audio input is connected to it! It is bleeding through IC6d!
It changes intensity when the 3 LEVEL knobs are turned.
I have found it bleeding through other places too.
If I figure it out, I will post it up.
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druish



Joined: Jun 23, 2009
Posts: 91
Location: New Paltz NY

PostPosted: Wed Jan 30, 2013 9:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow, yea that was a long time ago. . .

I eventually "minimized" the issue by replacing most of the wiring with shielded cable and wire placement. Could not completely get rid of it but it was tolerable. I did not go poking around too much so if you discover a better solution, I'm interested. Looks like just us. . .
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