Boomerang+Pedal Board=Hum?

[fuzzyratfarts]

Independently, neither hum noticeably. With the Boomerang looper in the chain after the entire pedal board, there's a noticeable hum. New cables, LiveWire and Mogamis. The back of the Boomerang says its 9-10vAC. My pedalboard consists of a few Boss pedals, Tim, Zen, this and that, which I believe are all DC. Would the AC Boomerang and DC pedalboard cause this? HELP!

 

[silverface63]

Are you messing with the trim knob?

 

[fuzzyratfarts]

Yes, and it doesn't help..

 

[vorvick]

You may have introduced a ground loop. This has helped me:
http://www.ebtechaudio.com/humxdes.html

 

[dividedsky]

No idea but my boomerang would pick up radio stations. I'll never forget the first time I looped about 10 seconds of talk radio and played over it. Kind of fun actually.