Cgs synth

>My main worry is:
>Might this be a op amp problem?

Possibly. Is the signal louder at pin 5 of the opamp? If it is, you
definitely have a problem. You should be able to increase the gain of the
opamp by putting a lower value resistor in the Gain Adust reisitpr position.
(See the schematic)

>Can using low quality capacitors be a problem as well?

Probably not. They would have to be attrocious to the point of being faulty.

Ken

>
>--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>>
>> I connected mine up to +/-12 volts today, without midification, though I do
>> have an adjustable plate currrent on my module. I was using line level
>> signals. It worked without issue.
>> One fellow who was using hotter signals was finding some distortion that
>> differed from when running on +/-15 volts.
>>
>> Try reducing the filament current limiting resistors from 1k5 to 1k2, and
>> putting a 20k pot in series with the 8k2 plate resistor.
>>
>> Ken
>> _______________________________________________________________________
>> 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
>
>
>
>

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