How to get rid of 'pops' in AB router pedal?

[antojado]

First off, I've done some searches and read what I could find about popping, but if anyone knows of a thread that might be helpful, it would be appreciated.
Basically what I did is build two AB switches into one box using the schematic from fulltone. So I have two inputs to two outputs so two guitars can be sent to two different amps. So the output from one switch goes to the next switch and to the two outputs. One amp is my guitar amp and the other is the house PA (this is at church). The output to the house has one pedal in the chain; a strobostomp. So when I switch the pedal there's a loud pop in the house It doesn't pop as much if at all in my amp. Maybe because of other pedals in that chain? I've tried putting resistors on the input of the pedal and resistors on the output of the pedal and still it pops.  I haven't tried resistors on the inputs and outputs at the same time, but I don't know what difference that would make. The pedal is powered by a Pedal Power and I've tried it plugged in and not. I've also tried isolating the pedal ground from the power ground and that just added hiss (still popped). I used lower value resistors on the leds, but it pops whether they're plugged in or not so I'm guessing that isn't the issue. By the way I used 1M for those. Also, the strobostomp pops as well when switched, and I haven't tried it without it in the chain. Anyway, I know that's a long description, but maybe someone has an idea about how to solve it. Thanks for any help!

[antojado]

Lots of looks but no suggestions yet. If you have any ideas about what might fix it they're appreciated. Thanks.

[ECistheBest]

the fulltone A/B box? did u use 3PDT with an LED? i guess you did some modifications. did u try pulldown resistors on the inputs and outputs yet? that might help a bit. add a 1M or 2M resistor going from the tip of each jack to ground. i don't think u need to adjust the values of thet LED's current limiting resistor.

[Austin73]

i added 10m resistors on all my jacks (I think I did) and that seemed to cure my problems

Aus

[iShawn]

Does this fix work with any popping jacks?  I have one which I made a footswitch with, it runs off the power from the amp, but has no LEDs or anything (so, basically passive).  One button on the footswitch makes a pop when I engage it...

[antojado]

Update: I found that the entire problem is the strobostomp tuner. I switched the ground lift dip switch and removed almost all of the popping. When I plug directly into my ab-ba box it doesn't pop at all. I'm not sure whether it's now on ground lift or not; I just switched it to see what would happen. Maybe I should put the tuner in front of the ab-ba box or I could rebuild it with a tuner out.

iShawn - I added 1M resistors to the output jacks. I've seen values as low as 100k. Some people add them to both input and output jacks, but I would think just doing the output would do the trick. Try it and see if it clears up the problem. If the problem is due to voltage/current spikes then it 'should' cure it. If it's a bad switch or something else, maybe not. In my case it had something to do with the tuner pedal and ground which only switching the ground lift would fix. Maybe to do with mismated impedences?

[iShawn]

I see, it is an amp footswitch so there's only one jack.  I might try it, I'll let you know if it works, but I have a feeling it won't...