by hawaii121 » Wed Dec 14, 2011 1:42 pm
Having been down this road a bit myself... If the "pop" sounds like a footswitch click that has a mic next to it (unusually loud) it probably means you have leaking DC voltage somewhere in your chain. If this is true, batteries wont solve it. Here are a few options for trouble shooting.
1. EASY OPTION: Does the pedal still pop when isolated? If "yes" try switching out your pre-amp tube in V1. Most amps rely on the V1 pre-amp tube to remove DC voltage (it's more complicated than this, but in a nutshell that's what they do).
2. MORE TIME CONSUMING: Do you have a multi-meter? If it is leaking DC voltage, batteries are not going to solve the problem. Plug a cable into both sides of all your pedals and take a DC reading on the amp side cable with the pedal "on" and "off" - you should not have a reading of higher than 2mv (again, little rusty on this, but I think that's the right metric) on any pedal, if you do, that pedal might be your culprit.
3. MORE TIME CONSUMING: When I was having this problem, Bjorn kindly helped me trouble shoot and suggested checking all your DC cables as pedal "pop" is one sign they are going bad. The hitch? The pedal that is actually "popping" is not necessarily the one with the problem, so once a "pop" happens, you have to do process of elimination switching DC cables, removing pedal, etc... OR... if you have a multi-meter you can test DC cables the same way you test guitar cables.
Hope some of this is helpful and hopefully your problem is simple. Mine turned into a several week long goose chase that ended with finding out I had 2 or 3 bad pre-amp tubes that I was switching in an out of V1.
Hawaii121
Constant state of flux...