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 Forum index » DIY Hardware and Software » YuSynth
YS VCO: Unstable after a move
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dstrength



Joined: May 23, 2010
Posts: 17
Location: Mobile, Alabama, USA

PostPosted: Wed Oct 17, 2012 5:27 pm    Post subject: YS VCO: Unstable after a move Reply with quote  Mark this post and the followings unread

Well, I recently moved and had my modular stored in not so prime conditions (i.e. very humid) for a month.

Everything survived ok, but one of my Yusynth VCO's is now exhibiting a some random drift..maybe +/-0.5 hz around 100hz.

The voltages are very steady at +Vcc and -Vcc. The tempo still looks nicely coupled to the LM394.

Any ideas of what else to check?
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yusynth



Joined: Nov 24, 2005
Posts: 1222
Location: France

PostPosted: Thu Oct 18, 2012 12:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

May be one of the regulators (78L15 or 79L15) has suffered. Try and replace them with a new one.
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