Cgs synth

>
>
>> >i noticed that the output cap is 1uf on the board, but 10uf on the
>>>schematic (the rev1 pre-2010 schem). probably not relevant to the
>>>resonance problem, but otherwise significant?
>>
>>It's pretty insignificant - it just a coupling capacitor. Either is okay.
>>
>>The resonance control does affect gain - that is its purpose. It sounds like
>>one of your signal paths (the feedback path?) isn't working.
>
>well i'm back trying to sort this out. there really isn't much to go
>wrong with the feedback path of this circuit, so i'm wondering --
>
>- if there's a way to wire up the resonance pot wrong?

Three leads - so yes, it is possible!

>- if the pinout of the 2N2222 varies with package?

PN2222 probably have reversed connections.

>- what the resistance to ground should be at various points - i'm
>seeing 3.7k between the wiper of the resonance point and ground.
>seems a touch low... the 1k resistor in the path raises this to 4.7k.

Not really much that can be gained doing that sort of measurement.

Ken
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
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