Switch Popping, Duo Phase

[Pete's Pedals]

Built my 2nd Duo-Phase (first one works great). There is loud popping when engaging both footswitches. Any ideas about where to look first before I pull it apart? It works wonderfully (no ticking, even) when it is on and does not pop when switched off.

 

[Cybercow]

If you provide some good detailed photos of the PCB and all the wiring, we might have a better chance of providing assistance.

 

[Pete's Pedals]

Sorry - meant to include...

 

[Cybercow]

Try lifting the diagonal jumpers from both of the stomp switches. You can put them back if no change.

 

[jimilee]

Check your enclosure and see if everything is grounding. With it being painted / powder coated in the inside, the jacks may not be making contact.

 

[Cybercow]

Check your enclosure and see if everything is grounding. With it being painted / powder coated in the inside, the jacks may not be making contact.

Good catch @jimilee
The paint may need to be sanded from the inside of the enclosure where the jacks make contact with the inside of the enclosure.

 

[Pete's Pedals]

Try lifting the diagonal jumpers from both of the stomp switches. You can put them back if no change.

Genius! So I lifted the grounding diagonal wire on each of the switches, and the popping is almost entirely gone. If I crank the amp, can still hear it some. So what would be the issue here? Would it make sense to replace the diagonal wire on each switch with a resistor or capacitor of some value? I have also seen people recommend replacing the 10uf outbound cap with a 1uf bi-polar cap. Any experience with that? Thanks, Cybercow.

 

[Cybercow]

See posts #5 & #6 in this thread.

 

[Pete's Pedals]

Sorry - forgot to say. I tested all the grounding points to the enclosure and it is all good. That, at least, is not the issue.

 

[Mentaltossflycoon]

I had this problem with mine and replacing the 3pdt switches with ppcb basic relay bypass boards was the fix for me. Neither cheap or fast but hey, now my phaser feels phancy.