Neutrino popping loudly?

[add4]

I have just boxed a neutrino (my design, not madbean's same schematic, only sub is BAT46 for diodes), it pops loudly when the effect is turned on. I want to get rid of that.

What i tried :
- increase R1 to 3.3M then 10M -> no change
- Add a 10uF cap between the + and - legs of the LED -> no change
- change the switch -> no change

i'm short of ideas.. if anyone can help i'll be glad to try his/her(?) suggestion !!

THanks in advance

[add4]

the rules of electronics are strange ...
i closed the box so i could at least try it a bit even with popping, and... it doesn't pop anymore..
is there any reasonable explanation to that?

[bangerang101]

Not sure what the cause was in your situation but for future refrence, theres a few other ways to get rid of circuit "pops" when engaging/disengaging effects.

Ive had good success in the past w/ the following methods to cure circuit "pops" (asside from the more well known methods)

- a 100k "pulldown" resistor from output to gnd will eliminate pop, in most circuits (assuming the circuit doesn't already have this pulldown resistor integrated into the circuit). To accomplish this, I ususally just solder the 100k resistor between the output jacks "tip" lug and "sleeve" (ground) lug.

-swap the input capacitor w/ a new/different one... the input capacitor can be the culprit for "pops" if it is faulty/bad.

- make sure nothing is touching against something where it is not supposed to (ie, circuit board touching metal casing on potentiometers), and make sure everything is grounded properly.

W/ those few tips, I'll bet you can eliminate pops 90% of the time. In some cases you just have to live w/ it though, if your using a mechanical switch (non-relay type switching), to bypass the circuit.

[add4]

Thanks for this list, i was hoping for something like that when i posted.
i copy pasted your answer in a file for future reference.

Thanks for your input.

[bangerang101]

Hey, no problem man... glad I could help!