A question I've been meaning to ask about the old design. When I adjust the
resonance, there is a large, slow DC offset that tracks the knob turn then
drifts back to zero causing some nasty clipping if I turn it too fast. I
believe it has to do with the 10uF AC coupling cap at the TL071, and have
been meaning to change it to something smaller. How much smaller? Looks
like the new circuit has switched to 1uF, and it's on the other side of the
10k resistor now? Is there something else wrong with my board that could
be causing this? Probably is... never did get it to self-oscillate.
-gerald
resonance, there is a large, slow DC offset that tracks the knob turn then
drifts back to zero causing some nasty clipping if I turn it too fast. I
believe it has to do with the 10uF AC coupling cap at the TL071, and have
been meaning to change it to something smaller. How much smaller? Looks
like the new circuit has switched to 1uF, and it's on the other side of the
10k resistor now? Is there something else wrong with my board that could
be causing this? Probably is... never did get it to self-oscillate.
-gerald
On 11/7/06, sasami@... <sasami@...> wrote:
>Ken, are any of these changes worth doing as a modification to the old
>circuit? I am wondering about the additional diodes.
Yes, I feel the diodes are worthwhile. CV Reject would be worthwhile if you
are getting thumping.
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