I’m building an all big box EHX pedal board. One of the pedals is a big box Pulsar. It’s ticking when in bypass mode.
I found this topic and the person who necro bumped it had some great ideas which I tried out today.
With success!
https://www.ehx.com/forums/viewthread/1383/#36904

Here’s a picture of the inside of my pedal.
The green wire is connected to the output jack.
If it sits close to the pcb and more specifically close to the soldering points for the lugs of the shape control pot the ticking gets much louder.

Pulling it away from the pcb reduces the loudness of the ticking:
I unsoldered the green wire to run it further away (not going through that hole in the pcb) and it reduced the ticking even more.

However, as noted by the necro bumper in the linked thread, there’s even ticking when the green wire is not soldered at all, even when you completely remove the green output wire. Obviously there’s no audio signal output any longer, just the ticking.

The ticking is ‘broadcasted’ by the pcb and seemingly rather strongly by the soldering points of the shape control pot.
The output jack, and also the tip of the patch cable inside it, is right above those soldering points, acting like an antenna.
Using shielded wire instead of that unshielded green wire will only solve the ticking picked up by the wire to the output jack. The output jack itself and the tip of the patch cable inside it will still be bare and exposed and picking up ticking.

So I tried his suggestion of adding some shielding.
I simply cut a strip of regular aluminum foil, sandwiched it between some duct tape, to not short out points on the pcb while moving it around, and left the end of the aluminum strip bare so I could connect it to ground, the box/casing in this case.

I folded the ‘shield’ into a loop of some sort (not sure if this is needed) and shoved it between the pcb and the output jack.

Result: Absolutely zero ticking in bypass.

When there’s a pedal active before the Pulsar (or a buffered pedal) there won’t be any ticking either. I guess because in that case the signal is low impedance instead high impedance and thereby susceptible to interference.
I guess, in bypass with no pedal in front, it’s like removing the shielding for some length from your guitar cable and exposing the core conductor to a noisy emi environment.