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 Forum index » DIY Hardware and Software » Thomas Henry designs
XR2206 VCO tri/sine troubles!!
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tokyomatik



Joined: Jan 20, 2011
Posts: 122
Location: berlin
Audio files: 6

PostPosted: Tue Jul 30, 2013 10:02 pm    Post subject: XR2206 VCO tri/sine troubles!!
Subject description: sine looks like a square??
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hi guys! i finish to build an 2206 vco and the sine is kind of strange.
is more than the double in amplitude respect the triangle and it looks like a square wave a bit rounded, im trying to fix it with symmetry and round trimmers but i dont see good results.
the triangle instead has a little spike / imperfection similar to the 4046... nothing too bad.
the square is ok.
i didnt used an lf442 but i already placed an order. at the moment i have an LM358...could be the reason?
im also not really sure about the wiring of the switch, i didnt found any drawing about it...anyone??
i also still have to wire the skew parts but i dont think this could be the cause.... Question
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tokyomatik



Joined: Jan 20, 2011
Posts: 122
Location: berlin
Audio files: 6

PostPosted: Fri Aug 09, 2013 3:04 am    Post subject: Reply with quote  Mark this post and the followings unread

well i swapped the lm358 with an lf442and the result still the same...at this point i will try one by one all the xr2206 that i've in stock and if also this doesnt help....Ahhhhhhhhhhhhhhhhh
i will tKE A PICTURE OF THE BOARD...MAYBE IT WILL ALSO HELP
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