Hi have you solved the "noise" issue?minnow wrote:Hi everyone. Some updates on this.
I have built this according to the layout (not the schematic values, refer to notes):
1. 1K8 on layout (vs 1K on schematic)
2. 100 on layout (vs 100K on schematic)
3. 33uF capacitor polarity (polarity follow schematic, not the layout)
4. 47nF cap connects LM324 pins 1 & 4 on layout (vs pins 5 & 7 on schematic)
It works! Great sounding phaser (coming from someone who dislike phaser effect).
However, there is a kind of "noise" that happens during the trebly end of the sweep (swirl). Like a flourescent lamp "eeeeeeek" noise.
When the sweep (swirl) is on the dark side of the moon, noise is not present / noticeable.
Hope my explanation is not too confusing.
This is noticeable in both switch positions. The position with deeper sweep has more noticeable "noise".
I have tried this effect without the guitar plugged in, meaning the pedal outputs directly to the amp, with a battery.
So ruled out my guitar pickups causing this problem.
I turned off my lights, turned off computer monitor (unplugged from mains) and tried the amp on two different power mains.
The amp is quiet with other pedals.
During my build, every component measured prior to soldering, and measured for contact after soldering.
STILL, probably a build error from my side.
But any help / clue on what to look out for will be great.
Could it be switch wiring error?
One more thing, when I unplug the guitar cable to the pedal, one switch position howls and squeals. Plug in again and it's gone.
I hope anyone else who has built it or anyone working on this can chime in and get this project in FSB going.
As always, thanks everyone!
I'm gonna try to build this one but i'm afraid of the same problem.
Has anyone else build this pedal? I really need comments.
Also i've a question. I couldn't find 2n5088. Shall i use BC239 instead? Or any suggestions?