Pedals popping

[warioblast]

Few months ago, I turned my JCM2000 DSL 50 into a JTM 50. http://el34world.com/Forum/index.php?topic=21066.msg223171#msg223171
The amp is now a JMP50. All that is left from the DSL50 are the chassis, the switches and the transformers.

During the last months of the DSL50, I noticed that my pedals were popping when I switched them and that they were noisier too. My DSL was pretty ill by that time, so I assumed that it was the cause of the poppings.

Once I finished building the JTM50, my pedals were still popping. As I mentionned earlier the amp is now a JMP50, I put new preamp and power tubes right after the JMP conversion. And my pedals are still popping and I think noisier than I remember.

I tried different cables.
Feeding the amp with only a single pedal.
Pedals powered by my Voodoo Lab Pedal Power 2+ or battery powered.
The pops happen on both channel of the amp. No matter how I set the master volume.

One thing I read about and didn't try yet, is to plug the amp in an other room.

On my board right now I have the following pedals:
_ Analogman NKT Sun Face _ True Bypass . It pops
_ Analogman Beano _ TB. Pops
_ Chicago Iron Octavia _ TB. Pops
_ MXR Phase 90 _ TB. Pops
_ Pedalworx Tejas _ TB. Pops
_ Tremulator _ I don't think this one is TB. Pops
_ Digitech Hardwire Delay _ Pops in TB mode but not it buffered mode
I dug a Roger Mayer pedal out of my drawer to make a test. It doesn't pop with the buffered output... and it doesn't pop with the True Bypass out.     

[Tony Bones]

Plug just a cable into the amp and measure the DC voltage between the tip and ground of the loose end.

[warioblast]

I measured 0.9 mV

[Tony Bones]

That's close enough to zero. I wanted to see if the amp was generating some non-zero voltage there like 0.5V.

I hope someone here in the effects section can help, though I think that if ALL your pedals do it then it is probably not a thing with the pedals but with the amp. ... or maybe the pedal power supply. After that I'm all out of ideas. 

[warioblast]

I think this thread belongs more in the amp section...

I did more tests this afternoon. Turns out the Roger Mayer pops too, with both buffered and true bypass outputs, but not as loud as the other pedals though.

The Digitech Delay in buffered mode is the only one that doesn't pop. The Sunface and the Beano pop and are battery powered.

I have pretty much the same pedals for years now. My power supply and cables are still the same. So I'm really confused as to why even with my DSL, the pops started; I started to think it was because of a bad tube. At one point I used to have 4 more True Bypass pedals in my chain and they were all silent whenever I stomped on them. And I do believe they were quieter too. 

[smackoj]

Here is a real easy to build buffer that you can try in between one or more pedals. If it helps then wallah! The pedal builders all have gone to adding a 'knock down' resistor of 1 to 3.3 Meg from signal to ground just past the input jack. Sometimes you see them use 2 knock downs, one in front and another one from signal to ground just before the output jack.  Good luck

http://guitar-fx-layouts.42897.x6.nabble.com/Stupidly-Awesome-Buffer-by-soulsonic-td24105.html#none

[okguitarman]

check caps has fixed many popping pedals