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 Forum index » DIY Hardware and Software » YuSynth
S&H/Noise module - S&H not so functional anymore
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Argitoth



Joined: Jun 24, 2008
Posts: 152
Location: Gilbert, Arizona
Audio files: 3
G2 patch files: 6
PostPosted: Fri Sep 10, 2010 12:09 pm    Post subject: Reply with quote  Mark this post and the followings unread
This too bizarre for my limited skill. I'm going to find someone who does modular synth repairs. I'll let you know how that goes.
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Argitoth



Joined: Jun 24, 2008
Posts: 152
Location: Gilbert, Arizona
Audio files: 3
G2 patch files: 6
PostPosted: Fri Oct 22, 2010 5:57 pm    Post subject: Reply with quote  Mark this post and the followings unread
One module had a broken connection to the power distribution board.

The other module's internal noise circuit was so loud is was overloading the... op amp? or something, I dunno, but it was too much for the circuit to handle.

Both modules had resistors added to them so that it the LED would function properly.

Both modules' noise levels were adjusted to be appropriate for recording or whatever.

Let me know if you need specifics. I can go through my old e-mails or contact Dave Brown
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yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France
PostPosted: Sat Oct 23, 2010 12:47 am    Post subject: Reply with quote  Mark this post and the followings unread
Argitoth wrote:
One module had a broken connection to the power distribution board.

The other module's internal noise circuit was so loud is was overloading the... op amp? or something, I dunno, but it was too much for the circuit to handle.

Both modules had resistors added to them so that it the LED would function properly.

Both modules' noise levels were adjusted to be appropriate for recording or whatever.

Let me know if you need specifics. I can go through my old e-mails or contact Dave Brown


Hi Argitoth.

Probably are you using some kind of very bright LED though, the cicrcuit was designed for plain low consumption LEDs.
Your problems seemed to come from the fact you add a too efficient noise transistor that would over-polarize the FET transistor of the S&H.
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Yves
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