Many problems..

[guest]

ive never completely isolated the cause of the warble
i think someone posted that q22 was the culprit for theirs
there are a few long threads on the topic

[eisenhower]

ive never completely isolated the cause of the warble
i think someone posted that q22 was the culprit for theirs
there are a few long threads on the topic

The voltages on my q22 looked correct. Could the chip still be bad?

[guest]

i rechecked the old thread
http://adafruit.com/forums/viewtopic.php?f=12&t=17605
and it was actually q21

i cant guarantee that its actually the problem
almost every filter warble issue that people have solved
was caused by a different device

is ic23 getting hot at all
what is the voltage drop across r1

[eisenhower]

i rechecked the old thread
http://adafruit.com/forums/viewtopic.php?f=12&t=17605
and it was actually q21

i cant guarantee that its actually the problem
almost every filter warble issue that people have solved
was caused by a different device

is ic23 getting hot at all
what is the voltage drop across r1

that thread says the 2sc2291 caused it, which is q22.

I replaced q21 with a spare I had. It didn't change anything.

ic23 does not get hot.
voltage across r1 is 1.22V

[guest]

well its probably not a powersupply problem then

you can try replacing q22
its about all i can think of at the moment