#1
Hi,

I have a problem with the boss ch-1 pedal. It hums(whining sound or smth) loudly, when connected to adapter. Everything is fine with the 9volt battery. I don't think it is the adapters fault, because I have it connected to a Dunlop wah and it gives 600mA, so 200mA for wah and 200mA for chorus. I bought the pedal on eBay, so it may be faulty somehow. I think that it's an electronical problem, but could anybody give me some tips, how this can be fixed?

Thanks
#2
maybe try taking the battery out and then plugging in the adapter? no clue but it's probably something i'd try as a first step
#5
Sure, but what test's are you thinking of? Unfortunately I don't have a multimeter, so I can't check the voltage :/