Cgs synth

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/>
>>
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>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
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>

_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>