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.

Ken

>
>>It is probably a bad joint or construction error, and it is probably
>>elsewhere in the circuit, not directly in the resonance circuit.
>>
>>Ken
>>
>>>just "finished" my rev 1 steiner filter finally. thanks to John
>>>Loffink for the mods and Richard Brewster for the before & after mod
>>>schems.
>>>
>>>the filter works fine apart from the resonance, which seems to act as
>>>a volume control! i wired it up so that "full" resonance would be no
>>>resistance between the two pot terminals, seemed the right way... but
>>>with the resonance pot all the way a/clockwise, i get a full strength
>>>signal which sounds like no resonance, and with the pot all the way
>>>clockwise, i get no output at all.
>>>
>>>weird eh? the resonance circuit seems simplicity itself...
>>>
>>>any help appreciated!
>>>
>>>thanks,
>>>j
>>>
>>>
>>>
>>>
>>>------------------------------------
>>>
>>>The CGS Modular Synth home page: http://www.cgs.synth.net/
>>>Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>_______________________________________________________________________
>>Ken Stone sasami@... otherunicorn@...
>>Modular Synth PCBs for sale <http://www.cgs.synth.net/>
>>Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>>
>>
>>
>>------------------------------------
>>
>>The CGS Modular Synth home page: http://www.cgs.synth.net/
>>Yahoo! Groups Links
>>
>>
>>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

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