What is the purpose of the processor inputs on this vco?
--- In cgs_synth@yahoogroups.com, sasami@h... wrote:
>
> The wave should remain at a constant height for all incoming
voltages. This
> suggests that there is something wrong with the current source (the dual
> transistor and the parts around it). The current source appears to be
> accting as a voltage source at the moment.
>
> Ken
>
> >Thanks for the reply,
> >I'm double checking everything but nothing seems abnormal. When i
> >apply CV it changes octave correctly and can be tuned but the lower
> >notes have so much gain that the upper haves of the signal are clipped
> >and the output is about 6V pk-pk. when i play the higher notes the
> >gain starts to decrease. two or three octaves up the amplitude is less
> >than 1V pk-pk. Should i get a clean saw with this? Is decreasing gain
> >normal for the higher octaves? I'm going to go on the assumption that
> >i have an improperly placed resistor. Does amyone have any suggestions
> >or things to check to narrow down the fault?
> >
> >--- In cgs_synth@yahoogroups.com, sasami@h... wrote:
> >>
> >> I suggest you look elsewhere for the fault - more likely a wrongly
> >placed
> >> component. Using 2% resistors will at most cause a slight
difference in
> >> stability. It certainly won't be the difference between it working
> >or not.
> >>
> >> Ken
> >>
> >> >Hey. I just built the ken stone vco and i am trying to test it.
I seem
> >> >to be having a problem. The oscillator with no CV applied looks
> >> >clipped. When i add higher CV voltages the amplitude decreases
and it
> >> >is no longer clipped. It also does not give a clean saw output. It
> >> >looks more like a half rectified sinewave. I believe my problem
might
> >> >lie in that i used alot of 2% metal film resistors since i had
alot of
> >> >them already. Does anyone have any sugestions.
> >> >Thanks
> >> >Josh
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >> >
> >> >Yahoo! Groups Links
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
_______________________________________________________________________
> >> Ken Stone sasami@h... or sasami@c...
> >> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> >> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> _______________________________________________________________________
> Ken Stone sasami@h... or sasami@c...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>