RC-2 hum mods?

[phector2004]

Does anybody have an idea on how to reduce the high-pitched whine that comes out of a Boss RC-2? It gets irritating at higher volumes/when I have headphones plugged into my amp 

I can't find a schematic anywhere, and I'm not willing to mess around with it unless I'm sure I can change something (an IC, maybe? I have a tendency to break stuff... expensive stuff)

[LiquidMetal]

I had the same problem which was solved once I changed the power supply. In my case this was related to powering more than one pedal with one adapter.

[phector2004]

hmmm i'll have a look into that, but I'm pretty sure it still did it before I daisy chained my pedals. Doesn't sound like a 60Hz hum though, more like a 10kHz thing

[Processaurus]

I had a problem with my PS-5 like that, it kind of made robot noises on the daisy chained power.  Running it off its own power source was the solution.

If it's a internal crosstalk thing from some wires carrying the analog guitar signal coming near its processor, rather than noise on the power lines, one could contrive some shielding to try to separate analog from digital in the space inside.  I covered some tin (because you can solder a ground wire to it) in packing tape and wired it to ground, and it cured the wine in an alesis effect.

I've noticed boss TU-2's have a little tin hood wrapped around the input jack to shield it from the tuner's processor nearby.

[phector2004]

neat idea!

I'll look into finding a schematic, or maybe opening it to try and figure out what's going on
it sounds like there's a gate of some sort that they've implemented to take care of it, cause it only whines when there's ambient noise from the guitar strings. When the strings are dead silent (i.e. muted) the whine goes away

if I can't find anything, I'll give the insulated foil a shot. (Might use duct tape though, to make it more DIY  )

think emailing them would get a reply?

[elshiftos]

Mine whistles too. It appears to be getting onto the PSU rail and into the other pedals. When I pull the PSU from the RC-2 and run it from internal battery, the whistle goes away.

Lost interest with this one - maybe I'll come back to it one day 

[phector2004]

the local guitar store tends to snatch the batteries out of the pedals they sell 

I'll give it a shot, don't think I've ever had a battery in it

[The Tone God]

I had the same issue with my RC-2 using a power supply that has individual regulated outputs but no isolated input power. Careful routing of the RC-2's ground helped alot but it was still an issue at higher volumes. I went with an separate supply just for the RC-2. It was the only way to solve it but I still have issues with going into PA without ground isolation.

Andrew